The 1985 Humboldt State Lumberjacks football team represented Humboldt State University—now known as California State Polytechnic University, Humboldt—as a member of the Northern California Athletic Conference (NCAC) during the 1985 NCAA Division II football season.
Led by Bud Van Deren in his 20th and final season as head coach, Lumberjacks compiled an overall record of 2–8 with a mark of 1–4 in conference play, tying for fifth place in the NCAC.
Humboldt State played home games at the Redwood Bowl in Arcata, California.
In 20 years under Van Deren, the Lumberjacks compiled a record of 98–101–4 (.493).
They had nine winning seasons, and won the conference championship once, in 1968.