ECAC West was a college athletic conference which operated in the northeastern United States until 2017.

The conference consisted entirely of schools from upstate New York until 1988 when Mercyhurst joined.

In 1992 all universities that were members SUNYAC and a few other schools left when Mercyhurst took part in the effort that was made to restart the Division II Championship, leaving just seven teams in the ECAC West.

After two more schools dropped their programs the conference was down to five teams in 1994 but it began to recover when Niagara joined in 1996.

When the Division II Tournament ended in 1999 the conference returned to D-III and was left with only four schools but in 2001 it began to sponsor women's hockey as well and its ranks immediately swelled to nine universities.