Exhibit 8

                            WILLIAMS & ANDERSON, LLP
                                111 Center Street
                               Twenty-Second Floor
                           Little Rock, Arkansas 72201
                                 (501) 372-0800


                                 April __, 1999


Simmons First National Corporation
P. O. Box 7009
Pine Bluff, Arkansas  71611

NBC Bank Corp.
100 West Grove St.
El Dorado, Arkansas 71730


     Re: Simmons First National Corporation Registration Statement on Form S-4

Gentlemen:

         We have  acted as counsel to Simmons  First  National  Corporation,  an
Arkansas  corporation  ("Simmons"),  in connection with the proposed merger (the
"Merger") of NBC Bank Corp.,  an Arkansas  corporation  ("NBCBC")  with and into
Simmons,  pursuant to the terms of the Agreement and Plan of Merger, dated as of
March 22, 1999 (the  "Agreement")  by and between Simmons and NBCBC as described
in the  Registration  Statement  on Form  S-4 to be filed  by  Simmons  with the
Securities and Exchange Commission (the "Registration Statement").  This opinion
is being rendered  pursuant to the  requirements of Item 21(a) of Form S-4 under
the Securities Act of 1933, as amended.

         In connection with this opinion, we have examined and are familiar with
originals or copies,  certified or otherwise identified to our satisfaction,  of
(i) the  Agreement,  (ii)  the  Registration  Statement  and  (iii)  such  other
documents as we have deemed  necessary or  appropriate  in order to enable us to
render the opinions below. In our  examination,  we have assumed the genuineness
of all signatures,  the legal capacity of all natural persons,  the authenticity
of all  documents  submitted  to us as  originals,  the  conformity  to original
documents  of  all  documents  submitted  to  us  as  certified,   conformed  or
photostatic  copies and the  authenticity of the originals of such copies.  This
opinion is subject to the  receipt  by counsel  prior to the  Effective  Date of
certain written representations and covenants of Simmons and NBCBC.

         Based upon and subject to the foregoing,  the  discussion  contained in
the prospectus included as part of the Registration Statement (the "Prospectus")
under the caption "Certain 




Federal Income Tax Consequences", except as otherwise indicated,  expresses our
opinion  as  to  the  material  Federal  income  tax consequences applicable to 
holders of NBCBC Common Stock.  You should be aware, however,  that the  
discussion  under the caption  "Certain  Federal  Income Tax Consequences" in 
the Prospectus represents our conclusions as to the application of existing law 
to the instant  transactions.  There can be no  assurance  that contrary 
positions may not be taken by the Internal Revenue Service.

         This opinion is furnished to you solely for use in connection  with the
Registration  Statement.  We hereby  consent to the filing of this opinion as an
exhibit to the  Registration  Statement.  We also consent to the  references  to
Williams  &  Anderson  LLP  under  the  heading   "Certain  Federal  Income  Tax
Consequences" in the Registration Statement and the Prospectus.


                                          Very truly yours,

                                          WILLIAMS & ANDERSON LLP


                                          /s/ Patrick A. Burrow 
                                         ------------------------
                                             Patrick A. Burrow

PAB/ms