UNITED STATES
               SECURITIES AND EXCHANGE COMMISSION
                     Washington, D.C. 20549


                            FORM 8-K


                          CURRENT REPORT
Pursuant to Section 13 or 15(d) of The Securities Exchange Act of 1934


Date of Report (Date of earliest event reported)  August 30, 2007


         AEI INCOME & GROWTH FUND XXI LIMITED PARTNERSHIP
      (Exact name of registrant as specified in its charter)


      State of Minnesota            0-29274            41-1789725
(State or other jurisdiction  (Commission File       (IRS Employer
      of incorporation)             Number)        Identification No.)


       30 East 7th Street, Suite 1300, St. Paul, Minnesota, 55101
                (Address of Principal Executive Offices)


                          (651) 227-7333
       (Registrant's telephone number, including area code)



  (Former name or former address, if changed since last report)

Check  the  appropriate  box below if  the  Form  8-K  filing  is
intended to simultaneously satisfy the filing obligation  of  the
registrant under any of the following provisions:

[  ]  Written  communication  pursuant  to  Rule  425  under  the
      Securities Act (17 CFR 230.425)
[  ]  Soliciting  material  pursuant to  Rule  14a-12  under  the
      Exchange Act (17 CFR 240.14a-12)
[  ]  Pre-commencement communications pursuant to  Rule  14d-2(b)
      under the Exchange Act
      (17 CFR 240.14d-2(b))
[  ]  Pre-commencement communications pursuant to  Rule  13e-4(c)
      under the Exchange Act
      (17 CFR 240.13e-4(c))


Section 2 - Financial Information

Item 2.01 Completion of Acquisition or Disposition of Assets.

       On  August  30,  2007,  the  Partnership  sold  a  Champps
Americana  restaurant in San Antonio, Texas to the  tenant.   The
Partnership   received   net  cash  proceeds   of   approximately
$3,145,000  for the property, which resulted in  a  net  gain  of
approximately $1,020,000.

Section 9 - Financial Statements and Exhibits

Item 9.01 Financial Statements and Exhibits.

      (a) Financial  statements  of  businesses  acquired  -  Not
          Applicable.

      (b) Pro forma  financial information - A limited number  of
          pro  forma  adjustments are required to illustrate  the
          effects  of  the transaction on the balance  sheet  and
          income  statement.  The following narrative description
          is  furnished  in  lieu  of the pro  forma  statements.
          Assuming  the  Partnership had  sold  the  property  on
          January 1, 2006:

          The Partnership's Investments in Real Estate would have
          been  reduced  by  $2,233,661 and  its  Current  Assets
          (cash) would have increased by $3,145,000 and Partner's
          Capital would have increased by $911,339.

          For  the  year  ended December 31,  2006,  Income  from
          Continuing  Operations would have  decreased  $267,742,
          representing a decrease in rental income of $336,847, a
          decrease  in  depreciation expense  of  $65,257  and  a
          decrease  in  property management expenses  of  $3,848.
          For  the  six  months ended June 30, 2007, Income  from
          Continuing  Operations would have  decreased  $147,703,
          representing a decrease in rental income of $180,803, a
          decrease  in  depreciation expense  of  $32,628  and  a
          decrease in property management expenses of $472.

          The  net  effect  of these pro forma adjustments  would
          have  caused Net Income to decrease from $1,851,899  to
          $1,584,157  and from $647,947 to $500,244, which  would
          have  resulted in Net Income of $68.78 and  $21.72  per
          Limited Partnership Unit outstanding for the year ended
          December  31,  2006 and the six months ended  June  30,
          2007, respectively.

      (c) Shell company transactions - Not Applicable.

      (d) Exhibits.

          Exhibit 10.1 - Purchase Agreement dated August 6,  2007
          between   the   Partnership   and   Champps   Operating
          Corporation   relating  to  the   Property   at   11075
          Interstate Highway 10 West, San Antonio, Texas.

                           SIGNATURES

      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 hereunto duly authorized.



                              AEI INCOME & GROWTH FUND XXI
                              LIMITED PARTNERSHIP

                              By: AEI Fund Management XXI, Inc.
                                 Its:  Managing General Partner

Date: September 4, 2007       /s/ Patrick W Keene
                              By: Patrick W. Keene
                                 Its:  Chief Financial Officer