The 1998 Jacksonville State Gamecocks football team represented Jacksonville State University as a member of the Southland Football League during the 1998 NCAA Division I-AA football season.
Led by second-year head coach Mike Williams, the Gamecocks compiled an overall record of 7–4 with a mark of 4–3 in conference play, placing fourth in the Southland.
Jacksonville State played home games at Paul Snow Stadium in Jacksonville, Alabama.
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