Lauren Bay-Regula (born August 9, 1981) is a Canadian athlete and sportswoman.
A former collegiate NCAA Division I All-American, left-handed hitting softball pitcher originally from Trail, British Columbia, she began playing softball at age 12, and eventually graduated from OSU-Stillwater, playing from 2000-03 where she holds all-time school records.
She was a part of the Canadian Softball Team who finished ninth at the 2002 World Championships in Saskatoon, Saskatchewan and fifth at the 2004 Athens Olympics.
Bay-Regula pitched in 2005 for the Chicago Bandits of the National Pro Fastpitch; in 2006, Bay signed with the expansion Philadelphia Force.
After her marriage she added her husband's surname to her own to create a portmanteau surname, Bay-Regula.