1999 Northwestern State Demons football team

The 1999 Northwestern State Demons football team represented Northwestern State University as a member of the Southland Conference during the 1999 NCAA Division I-AA football season. Led by 17th-year head coach Sam Goodwin, the Demons compiled an overall record of 4–7 with a mark of 3–4 in conference play, placing in fifth place in the Southland. Northwestern State played home games at Harry Turpin Stadium in Natchitoches, Louisiana.