Exhibit 15 Baird, Kurtz & Dobson 200 East 11th Avenue P. O. Box 8306 Pine Bluff, AR 71611 October 30, 1998 Securities and Exchange Commission 450 Fifth Street, N.W. Washington, D.C. 20549 Dear Sirs: We are aware that Simmons First National Corporation has incorporated our report dated August 6, 1998, by reference with respect to the unaudited consolidated financial statements of Simmons First National Corporation included in its Quarterly Report (Form 10-Q) for the three months and six months ended June 30, 1998, in the Registration Statement (Form S-4) and the related Prospectus for the registration of 301,833 shares of common stock of Simmons First National Corporation. We are also aware of our responsibilities under the Securities Act of 1933. /s/ Baird, Kurtz & Dobson, CPAs