| Year: | 1977 |
| Team: | Northern Arizona Lumberjacks |
| Sport: | football |
| Conference: | Big Sky Conference |
| Short Conf: | Big Sky |
| Record: | 9–3 |
| Conf Record: | 5–1 |
| Head Coach: | Joe Salem |
| Hc Year: | 3rd |
| Stadium: | Lumberjack Stadium, NAU Ensphere |
| Bowl: | NCAA Division II First Round |
| Bowl Result: | L 0–34 vs. Jacksonville State |
The 1977 Northern Arizona Lumberjacks football team was an American football team that represented Northern Arizona University (NAU) as a member of the Big Sky Conference (Big Sky) during the 1977 NCAA Division II football season. In their third year under head coach Joe Salem, the Lumberjacks compiled a 9–3 record (5–1 against conference opponents), outscored opponents by a total of 324 to 204, and finished second out of seven teams in the Big Sky.[1]
The team played its season and home opener on September 3 at Lumberjack Stadium before moving to the newly-constructed NAU Ensphere, later renamed the Walkup Skydome, in Flagstaff, Arizona.[2] The first game in the new stadium was played on September 17 against Montana.[1]
The Lumberjacks earned a berth in the 1977 NCAA Division II Playoffs, losing in the first round to Jacksonville State.
Northern Arizona did not play Idaho, so a non-conference game was designated to count in the standings for each team. Both were home games against Pacific Coast Athletic Association (PCAA) opponents; Idaho lost to Pacific, while NAU defeated Cal State Fullerton.