Registration No. 333-40480

                      SECURITIES AND EXCHANGE COMMISSION
                             Washington, D.C. 20549

                              --------------------

                         Post-Effective Amendment No. 4
                                       to
                                    FORM S-1
                                       on
                                    FORM S-3
             REGISTRATION STATEMENT UNDER THE SECURITIES ACT OF 1933

                              --------------------

                                 FX ENERGY, INC.
             (Exact Name of Registrant as Specified in Its Charter)

           NEVADA                         1311               87-0504461
           ------                         ----               ----------
      (State or other             (Primary Standard      (I.R.S. Employer
      jurisdiction of                Industrial           Identification
     incorporation or              Classification             Number)
       organization)                 Code Number)


                         3006 Highland Drive, Suite 206
                           Salt Lake City, Utah 84106
                                 (801) 486-5555
       (Address, including zip code, and telephone number, including area
               code, of Registrant's principal executive offices)

                                 David N. Pierce
                         3006 Highland Drive, Suite 206
                           Salt Lake City, Utah 84106
                                 (801) 486-5555

       (Name, address, including zip code, and telephone number, including
                        area code, of agent for service)

                                    Copy to:
                                 James R. Kruse
                                 Kevin C. Timken
                           Kruse, Landa & Maycock, LLC
                           50 West Broadway, 8th Floor
                            Salt Lake City, UT 84101
                            Telephone (801) 531-7090
                            Facsimile (801) 531-7091

Approximate  date of  commencement  of proposed  sale to the public:  As soon as
practicable after the effective date of this registration statement.

If the only securities  being registered on this Form are to be offered pursuant
to dividend or interest reinvestment plans, please check the following box. [ ]

If any of the  securities  being  registered on this Form are to be offered on a
delayed or continuous  basis  pursuant to Rule 415 under the  Securities  Act of
1933, other than securities offered only in connection with dividend or interest
reinvestment plans, check the following box. [X]

If this Form is filed to register additional securities for an offering pursuant
to Rule 462(b) under the Securities Act, please check the following box and list
the  Securities  Act  registration  statement  number of the  earlier  effective
registration statement for the same offering. [ ]

If this Form is a  post-effective  amendment filed pursuant to Rule 462(c) under
the  Securities  Act,  check  the  following  box and  list the  Securities  Act
registration  statement number of the earlier effective  registration  statement
for the same offering. [ ]

If delivery of the prospectus is expected to be made pursuant to Rule 434, check
the following box. [ ]


The  Registrant  hereby amends this amendment to the  registration  statement on
such date or dates as may be  necessary  to delay its  effective  date until the
Registrant  files a  further  amendment  which  specifically  states  that  this
amendment to the  registration  statement will  thereafter  become  effective in
accordance  with  Section  8(a) of the  Securities  Act of 1933,  or  until  the
amendment to the registration  statement  becomes  effective on such date as the
Securities  and  Exchange   Commission  acting  pursuant  to  Section  8(a)  may
determine.



        Post-Effective Amendment No. 4 to Prospectus dated July 10, 2000


                                 FX ENERGY, INC.

- --------------------------------------------------------------------------------
        This post-effective amendment is a part of and should be read in
              conjunction with our prospectus dated July 10, 2000.
- --------------------------------------------------------------------------------

 This post-effective amendment no. 4 updates our prospectus dated July 10, 2000.


                      INFORMATION INCORPORATED BY REFERENCE

         The SEC allows FX Energy to "incorporate  by reference"  information FX
Energy  files with the SEC,  which means that FX Energy can  disclose  important
information to people by referring them to other  documents that FX Energy files
with the SEC. The information incorporated by reference is considered to be part
of this  prospectus.  FX Energy has filed or furnished the  following  documents
with the SEC (File No. 0-25386) pursuant to the Securities  Exchange Act of 1934
and is incorporating those documents by reference in this prospectus.

o Annual  Report on Form 10-K for the year ended  December  31,  2000 (the "Form
10-K").

         All  documents  FX  Energy  files  with the SEC  after the date of this
prospectus will be deemed to be incorporated by reference in this prospectus and
to automatically  update and supersede the information in this  prospectus.  Any
statement  that is  modified  or  superseded  will not be  deemed,  except as so
modified or  superseded,  to be a part of this  prospectus.  References  to this
prospectus  include  information  incorporated  by  reference  as  well  as  any
subsequent prospectus supplements.

         FX  Energy  will  provide  at no  cost  to each  person  to  whom  this
prospectus is delivered,  upon written or oral request of that person, a copy of
any or all of the  information  that has been  incorporated by reference in this
prospectus but not delivered  with this  prospectus  (not including  exhibits to
that  information  unless  those  exhibits  are  specifically   incorporated  by
reference in that  information).  Investors should direct requests to FX Energy,
Inc., 3006 Highland Drive, Suite 206, Salt Lake City, UT 84106, Attention: Scott
J. Duncan, Telephone: (801) 486-5555.

                              AVAILABLE INFORMATION

         FX  Energy  has  filed a  registration  statement  (together  with  all
amendments and exhibits,  the "Registration  Statement") with the Securities and
Exchange  Commission  (the "SEC") to register the shares of common stock offered
by the selling  stockholders  under the  Securities Act of 1933, as amended (the
"Securities  Act").  This  prospectus,  which  is a  part  of  the  Registration
Statement,  does not contain certain  information set forth in the  Registration
Statement  because  SEC rules  permit  such  omission.  Statements  made in this
prospectus  as to the content of any contract,  agreement or other  document are
not necessarily  complete.  Some contracts,  agreements,  or other documents are
filed or incorporated by reference as an exhibit to the  Registration  Statement
or to a document  incorporated by reference in this prospectus.  In those cases,
investors should refer to such exhibits for more complete descriptions.

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         FX Energy files  reports,  proxy and  information  statements and other
information  with the SEC. The public may read and copy at prescribed  rates any
materials FX Energy files with the SEC, including the Registration Statement and
the exhibits thereto, at the SEC's offices at:

Public Reference Room        Citicorp Center            Seven World Trade Center
450 Fifth Street, N.W.       500 West Madison Street    New York, New York 10048
Washington, D.C. 20549       Chicago, Illinois 60661

For information, telephone the SEC's Public Reference Room at 1-800-SEC-0330.

The SEC Internet site at  http://www.sec.gov  contains materials FX Energy files
with the SEC in electronic versions through the SEC's Electronic Data Gathering,
Analysis and Retrieval system (EDGAR).

Public information is also available at:    The Nasdaq Stock Market
                                            1735 K Street, N.W.
                                            Washington, D.C. 20006.

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ITEM 17.  UNDERTAKINGS

Rule 415 Offerings: Post-Effective Amendments.  [Regulation S-K, Item 512(a)]

         The undersigned registrant hereby undertakes:

                  (1) To file,  during any  period in which  offers or sales are
         being made, a post-effective  amendment to this registration  statement
         to  include  any  material  information  with  respect  to the  plan of
         distribution not previously disclosed in the registration  statement or
         any material change to such information in the registration statement.

                  (2) That, for the purpose of determining  any liability  under
         the Securities Act of 1933, each such post-effective amendment shall be
         deemed to be a new  registration  statement  relating to the securities
         offered therein, and the offering of such securities at that time shall
         be deemed to be the initial bona fide offering thereof.

                  (3) To remove from  registration by means of a  post-effective
         amendment any of the securities  being registered that remain unsold at
         the termination of the offering.

Filings Incorporating Subsequent Exchange Act Documents by Reference [Regulation
S-K, Item 512(b)]

         The  undersigned  registrant  hereby  undertakes  that, for purposes of
determining  any liability  under the Securities Act of 1933, each filing of the
registrant's  annual  report  pursuant to section  13(a) or section 15(d) of the
Securities  Exchange  Act of 1934  (and,  where  applicable,  each  filing of an
employee  benefit  plan's  annual  report  pursuant  to  section  15(d)  of  the
Securities  Exchange  Act of 1934)  that is  incorporated  by  reference  in the
registration  statement  shall  be  deemed  to be a new  registration  statement
relating to the securities offered therein,  and the offering of such securities
at that time shall be deemed to be the initial bona fide offering thereof.

Incorporated Annual and Quarterly Reports [Regulation S-K, Item 512(e)]

         The undersigned  registrant hereby undertakes to deliver or cause to be
delivered with the prospectus,  to each person to whom the prospectus is sent or
given,  the latest annual  report to security  holders that is  incorporated  by
reference  in  the  prospectus  and  furnished   pursuant  to  and  meeting  the
requirements  of rule 14a-3 or rule 14c-3 under the  Securities  Exchange Act of
1934;  and,  where  interim  financial  information  required to be presented by
article 3 of regulation S-X is not set forth in the prospectus,  to deliver,  or
cause to be  delivered to each person to whom the  prospectus  is sent or given,
the latest  quarterly  report that is specifically  incorporated by reference in
the prospectus to provide such interim financial information.

Indemnification.  [Regulation S-K, Item 512(h)]

         Insofar as indemnification for liabilities arising under the Securities
Act may be permitted to  directors,  officers,  and  controlling  persons of the
small business issuer pursuant to the foregoing  provisions,  or otherwise,  the
small business issuer has been advised that in the opinion of the Securities and
Exchange SEC such  indemnification  is against public policy as expressed in the
Securities Act and is, therefore, unenforceable.

         In the event that a claim for indemnification  against such liabilities
(other than the  payment by the small  business  issuer of expenses  incurred or
paid by a director,  officer, or controlling person of the small business issuer
in the  successful  defense of any action,  suit, or  proceeding) is asserted by
such director,  officer, or controlling person in connection with the securities
being  registered,  the small business issuer will, unless in the opinion of its
counsel the matter has been settled by controlling precedent,  submit to a court
of appropriate  jurisdiction the question whether such  indemnification by it is
against public policy as expressed in the Securities Act and will be governed by
the final adjudication of such issue.

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                                   SIGNATURES

         Pursuant to the requirements of the Securities Act of 1933, as amended,
the Registrant certifies that it has reasonable grounds to believe that it meets
all of the  requirements  for  filing  on  Form  S-3 and has  duly  caused  this
Registration Statement to be signed on its behalf by the undersigned,  thereunto
duly authorized, in the city of Salt Lake City, on March 20, 2001.

                                                       FX Energy, Inc.

                                                       By: /s/ Scott J. Duncan
                                                          ---------------------
                                                          Scott J. Duncan
                                                          Vice-President

         Pursuant  to the  requirements  of the  Securities  Act of  1933,  this
amendment to the  Registration  Statement has been signed below by the following
persons in the capacities indicated and on the 20th day of March, 2001.


/s/  David N. Pierce
- --------------------------------------------------------
David N. Pierce
Director, President, and Chief Executive Officer
(Principal Executive Officer and Financial Officer)


/s/  Andrew W. Pierce
- --------------------------------------------------------
Andrew W. Pierce
Director, Vice-President, and Chief Operations Officer
(Principal Operations Officer)

                                                         By: /s/ Scott J. Duncan
                                                             -------------------
/s/ Thomas B. Lovejoy                                        Scott J. Duncan
- -------------------------------------------------------      Attorney-in-Fact
Thomas B. Lovejoy
Director, Chief Financial Officer and Vice Chairman


/s/  Scott J. Duncan
- --------------------------------------------------------
Scott J. Duncan
Director, Vice-President Investor Relations and Secretary


/s/  Dennis L. Tatum
- --------------------------------------------------------
Dennis L. Tatum
Director, Vice President and Treasurer
(Principal Accounting Officer)


/s/ Peter L. Raven
- --------------------------------------------------------
Peter L. Raven
Director


/s/  Jay W. Decker
- --------------------------------------------------------
Jay W. Decker
Director

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