The 2006 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 2006 NCAA Division I FCS football season.

In their ninth year under head coach Jerome Souers, the Lumberjacks compiled a 6–5 record (5–3 against conference opponents), outscored opponents by a total of 378 to 296, and finished fourth out of nine teams in the Big Sky.

[1] The team played its home games at the J. Lawrence Walkup Skydome, commonly known as the Walkup Skydome, in Flagstaff, Arizona.

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