Einar Jan Aas (born 12 October 1955) is a Norwegian former footballer who played as a centre-back.
In 1976, they were promoted to the Norwegian Premier League, and Verdens Gang named him central defender of the year in 1977 and 1979.
Midway through the following season, he was transferred to Nottingham Forest, at the time managed by Brian Clough.
He returned to Moss in 1984, and helped the club win its first and to date only League title in 1987, before retiring as a player.
Aas debuted in the national team in 1978, and played 35 international matches in total, scoring three goals.