FORM 10-Q
                       SECURITIES AND EXCHANGE COMMISSION
                             Washington, D.C. 20549


(Mark One)
[x]  Quarterly report pursuant to Section 13 or 15(d) of the Securities Exchange
     Act of 1934 For the quarterly period ended

                                 JUNE 30, 2001

[ ]  Transition  report  pursuant  to  Section  13 or  15(d)  of the  Securities
     Exchange  Act  of  1934
     For the transition period from __________ to __________

                         Commission File Number: 0-13807

                             CABLE TV FUND 12-B, LTD
                Exact name of registrant as specified in charter

       Colorado                                           #84-0969999
- ----------------------------                  ----------------------------------
State of organization                               I.R.S. employer I.D. #

                             c/o Comcast Corporation
                 1500 Market Street, Philadelphia, PA 19102-2148
- --------------------------------------------------------------------------------
                      Address of principal executive office

                                 (215) 665-1700
- --------------------------------------------------------------------------------
                          Registrant's telephone number

Indicate by check mark whether the registrant (1) has filed all reports required
to be filed by Section 13 or 15(d) of the Securities Exchange Act of 1934 during
the  preceding 12 months (or for such  shorter  period that the  registrant  was
required  to file  such  reports),  and  (2) has  been  subject  to such  filing
requirements for the past 90 days.

           Yes  X                                          No
              ------                                         -------


                            CABLE TV FUND 12-B, LTD.
                            ------------------------
                             (A Limited Partnership)

                             CONDENSED BALANCE SHEET
                             -----------------------
                                   (Unaudited)




                                                                                           June 30,             December 31,
                                        ASSETS                                               2001                   2000
                                        ------                                          --------------        ---------------
                                                                                                        
Cash                                                                                           $92,275               $140,393
                                                                                        --------------        ---------------

                                                                                               $92,275               $140,393
                                                                                        ==============        ===============


                           LIABILITIES AND PARTNERS' CAPITAL
                           ---------------------------------

LIABILITIES:
   Advances from affiliates.....................................................                $6,579                $15,690
                                                                                        --------------        ---------------

         Total liabilities......................................................                 6,579                 15,690
                                                                                        --------------        ---------------

PARTNERS' CAPITAL:
   General Partner-
     Contributed capital........................................................                 1,000                  1,000
     Distributions..............................................................           (19,696,268)           (19,696,268)
     Accumulated earnings.......................................................            19,716,692             19,726,444
                                                                                        --------------        ---------------

                                                                                                21,424                 31,176
                                                                                        --------------        ---------------

Limited Partners-
   Net contributed capital (111,035 units outstanding
     at June 30, 2001 and December 31, 2000)....................................            47,645,060             47,645,060
   Distributions................................................................          (114,620,017)          (114,620,017)
   Accumulated earnings.........................................................            67,039,229             67,068,484
                                                                                        --------------        ---------------

                                                                                                64,272                 93,527
                                                                                        --------------        ---------------

                                                                                               $92,275               $140,393
                                                                                        ==============        ===============


                  See notes to condensed financial statements.

                                       1


                            CABLE TV FUND 12-B, LTD.
                            ------------------------
                             (A Limited Partnership)

                        CONDENSED STATEMENT OF OPERATIONS
                        ---------------------------------
                                   (Unaudited)



                                                                      Three Months Ended                  Six Months Ended
                                                                           June 30,                           June 30,
                                                                     2001             2000              2001            2000
                                                                 -----------       -----------       ----------      ----------
                                                                                                           
OTHER INCOME (EXPENSE):
   Interest income............................................        $1,491                             $1,553
   Other, net.................................................       (31,751)         ($14,579)         (40,560)       ($32,714)
                                                                 -----------       -----------       ----------      ----------

NET LOSS......................................................      ($30,260)         ($14,579)        ($39,007)       ($32,714)
                                                                 ===========       ===========       ==========      ==========

ALLOCATION OF NET LOSS:
   General Partner............................................       ($7,565)          ($3,644)         ($9,752)        ($8,178)
                                                                 ===========       ===========       ==========      ==========

   Limited Partners...........................................      ($22,695)         ($10,935)        ($29,255)       ($24,536)
                                                                 ===========       ===========       ==========      ==========

NET LOSS PER LIMITED
   PARTNERSHIP UNIT...........................................        ($0.20)           ($0.10)          ($0.26)         ($0.22)
                                                                 ===========       ===========       ==========      ==========

WEIGHTED AVERAGE NUMBER OF LIMITED
   PARTNERSHIP UNITS OUTSTANDING..............................       111,035           111,035          111,035         111,035
                                                                 ===========       ===========       ==========      ==========


                  See notes to condensed financial statements.

                                       2

                            CABLE TV FUND 12-B, LTD.
                            ------------------------
                             (A Limited Partnership)

                        CONDENSED STATEMENT OF CASH FLOWS
                        ---------------------------------
                                   (Unaudited)



                                                                                            Six Months Ended
                                                                                                June 30,
                                                                                        2001                 2000
                                                                                    -----------          ------------
                                                                                                     
CASH FLOWS FROM OPERATING ACTIVITIES:
   Net loss.....................................................................       ($39,007)             ($32,714)
   Adjustments to reconcile net loss to net cash
     used in operating activities:
       (Decrease) increase in advances from affiliates..........................         (9,111)               32,714
                                                                                    -----------          ------------

         Net cash used in operating activities..................................        (48,118)

Cash, beginning of period.......................................................        140,393
                                                                                    -----------          ------------

Cash, end of period.............................................................        $92,275
                                                                                    ===========          ============

SUPPLEMENTAL CASH FLOW DISCLOSURE:
   Interest paid................................................................            $59                  $649
                                                                                    ===========          ============



                  See notes to condensed financial statements.

                                       3

                            CABLE TV FUND 12-B, LTD.
                            ------------------------
                             (A Limited Partnership)

                     NOTES TO CONDENSED FINANCIAL STATEMENTS
                     ---------------------------------------
                                   (Unaudited)

(1) The condensed  balance sheet as of December 31, 2000 has been condensed from
the audited  balance sheet as of that date.  The  condensed  balance sheet as of
June 30,  2001,  the  condensed  statement of  operations  for the three and six
months ended June 30, 2001 and 2000,  and the condensed  statement of cash flows
for the six months  ended June 30, 2001 and 2000 have been  prepared by Cable TV
Fund  12-B,  Ltd.  (the   "Partnership")  and  have  not  been  audited  by  the
Partnership's   independent  auditors.   In  the  opinion  of  management,   all
adjustments  necessary  to present  fairly the  financial  position,  results of
operations and cash flows as of June 30, 2001 and for all periods presented have
been made.

         Certain  information  and note  disclosures  normally  included  in the
Partnership's annual financial statements prepared in accordance with accounting
principles  generally  accepted  in the United  States  have been  condensed  or
omitted. These condensed financial statements should be read in conjunction with
the  financial  statements  and  notes  thereto  included  in the  Partnership's
December  31,  2000  Annual  Report on Form 10-K filed with the  Securities  and
Exchange  Commission.  The results of operations  for the periods ended June 30,
2001 are not necessarily indicative of operating results for the full year.

         The Partnership owns no properties directly.  The Partnership owns a 9%
interest in Cable TV Fund 12-BCD Venture (the  "Venture").  The Venture has sold
all of its cable television systems.  The Venture was liquidated in October 2000
and therefore, the Partnership has no investment in the Venture at June 30, 2001
or December  31,  2000.  The  Partnership  and the  Venture  have  continued  in
existence because of pending litigation in which the Partnership and the Venture
are a party. It cannot be predicted when the Partnership and the Venture will be
dissolved.

(2) The Partnership  reimburses its general  partner for certain  administrative
expenses.  These expenses  represent the salaries and related  benefits paid for
corporate personnel.  Such personnel provide  administrative,  accounting,  tax,
legal and investor  relations  services to the Partnership.  Such services,  and
their related  costs,  are necessary to the  administration  of the  Partnership
until the Partnership is dissolved.  Such charges were included in Other, net in
the accompanying  condensed statement of operations.  Reimbursements made to the
general partner by the Partnership for administrative  expenses during the three
and six month periods ended June 30, 2001 were $3,030 and $7,487,  respectively.
Reimbursements  made to the general  partner by the  Venture for  administrative
expenses  for the three and six month  periods  ended June 30, 2000 were $44,770
and  $97,690,  respectively,  of which  $4,110  and  $8,968,  respectively,  was
attributable to the Partnership.


                                       4

                            CABLE TV FUND 12-B, LTD.
                            ------------------------
                             (A Limited Partnership)

         MANAGEMENT'S DISCUSSION AND ANALYSIS OF FINANCIAL CONDITION AND
         ---------------------------------------------------------------
                              RESULTS OF OPERATIONS
                              ---------------------


FINANCIAL CONDITION
- -------------------

         The  Venture  was  liquidated  in  October  2000  and  therefore,   the
Partnership has no investment in the Venture at June 30, 2001. The only asset of
the  Partnership  at June 30,  2001 was its cash on hand  which is being held in
reserve to pay the Partnership's  administrative  expenses until the Partnership
is  dissolved.  The  Partnership  and the Venture  have  continued  in existence
because of pending  litigation  in which the  Partnership  and the Venture are a
party.  It cannot be  predicted  when the  Partnership  and the Venture  will be
dissolved.

RESULTS OF OPERATIONS
- ---------------------

         The  Venture  has  sold all of its  cable  television  systems  and was
liquidated in October 2000.  Other expense of $40,560  incurred in the first six
months of 2001 by the Partnership  related to various costs  associated with the
administration of the Partnership.

                           Part II - OTHER INFORMATION

Item 1.  Legal Proceedings

         The  Partnership is a nominal  defendant in several cases  consolidated
under the caption City Partnership Co.,  derivatively on behalf of Cable TV Fund
14-B, Ltd.,  plaintiff v. Jones  Intercable,  Inc.,  defendant and Cable TV Fund
14-B, Ltd., nominal defendant (U.S. District Court, District of Colorado,  Civil
Action No.  99-WM-1051)(consolidated  with  99-WM-1155,  99-WM-1702,  99-B-1508,
99-B-1604,   99-B-1751  and  99-B-1778).  The  plaintiffs  in  these  cases  are
challenging  the terms of,  and the  procedures  of the  limited  partner  votes
approving,  Jones  Intercable's  acquisitions  of the cable  television  systems
serving  Albuquerque,  New Mexico,  Calvert  County,  Maryland  and Palmdale and
Littlerock,   California   formerly  owned  by  the  Partnership   and/or  other
partnerships of which Jones  Intercable was the general  partner.  Comcast Cable
Communications,  Inc. is the Partnership's  current general partner as successor
to Jones  Intercable.  The  cases are  presented  as both  class and  derivative
actions. In June 2001, the plaintiffs filed a motion for class certification. In
August 2001,  defendant  Comcast  Cable  Communications,  Inc.  filed a brief in
opposition  to  plaintiffs'  motion  for class  certification.  A hearing on the
motion is scheduled for  September  2001.  If the  plaintiffs'  motion for class
certification is denied, the cases would proceed only as derivative actions.

         The  Partnership  was a defendant  in a case  captioned  Everest  Cable
Investors, LLC, et al., plaintiffs v. Jones Intercable, Inc., et al., defendants
(Superior  Court, Los Angeles County,  State of California,  Case No. BC 213632)
originally filed in July 1999.  Plaintiffs alleged that certain of them formed a
venture to acquire  limited  partnership  interests in the  Partnership and that
plaintiffs were frustrated in this purpose by Jones Intercable's alleged refusal
to provide  plaintiffs  with a list of the names and  addresses  of the  limited
partners of the Partnership. Plaintiffs alleged that their failure to obtain the
partnership list prevented them from making a tender offer for the Partnership's
limited partnership interests causing them economic loss. None of the plaintiffs
is a limited partner of the  Partnership but one of the plaintiffs  alleged that
it held a power of attorney from a limited partner of the Partnership. The trial
court found that a holder of a power of attorney is not a real party in interest
capable  of suing on the rights of the  principal  and thus  dismissed  the case
against the Partnership. The plaintiffs have chosen not to appeal this ruling of
the  trial  court  and  thus  the  Partnership  is no  longer  a  party  to this
litigation.

Item 6.  Exhibits and Reports on Form 8-K.

         a)   Exhibits

              None.

         b)   Reports on Form 8-K

              None.

                                       5



                                    SIGNATURE


         Pursuant to the  requirements  of the Securities  Exchange Act of 1934,
the  registrant  has duly  caused  this report to be signed on its behalf by the
undersigned thereunto duly authorized.

                                       CABLE TV FUND 12-B, LTD.

                                       BY:   COMCAST CABLE COMMUNICATIONS, INC.
                                             -----------------------------------
                                             General Partner


                                       By:   /S/ Lawrence J. Salva
                                             -----------------------------------
                                             Lawrence J. Salva
                                             Senior Vice President
                                             (Principal Accounting Officer)


Dated:  August 13, 2001