The New England Women's and Men's Athletic Conference (NEWMAC) is an association of 11 selective academic institutions that are committed to providing high quality competitive athletic opportunities for student-athletes within an educational and respectful environment that embodies the NCAA Division III philosophy. 

Wellesley has won a combined 66 NEWMAC Championships:

Basketball (1): 1986

Crew (9): 2003, 2011, 2012, 2013, 2014, 2015, 2016, 2017, 2018

Cross Country (10): 1986, 1993, 1994, 1995, 1996, 1998, 1999, 2000, 2002, 2005

Field Hockey (8): 1987, 1995, 1996, 1997, 1998, 2002, 2013, 2014

Lacrosse (8): 1990*, 1995, 1996, 1997, 1998, 1999, 2000, 2001

Soccer (1): 1999

Softball (3): 2007, 2014, 2015

Swimming & Diving (4): 1997, 1998, 1999, 2000

Tennis (11): 1990, 1991, 1995*, 1996*, 1998*, 2004, 2005, 2006, 2007, 2008, 2011

Volleyball (11): 1991, 1995, 1996, 1997, 1998, 1999, 2000, 2001, 2002, 2007, 2009

* No Conference Tournament