EXHIBIT 15 November 7, 2003 To the Board of Directors of First Community Bancshares, Inc. We are aware of the incorporation by reference in the Registration Statement Nos. 333-63865, 333-31338, 333-75222, 333-104384 and 333-106338 of First Community Bancshares, Inc. relating to the unaudited consolidated interim financial statements of First Community Bancshares that are included in its Form 10-Q for the quarter ended September 30, 2003. /s/ Ernst & Young LLP Charleston, West Virginia 1