Karen T. "Kate" McCallum (born 1946) is a professional American bridge player from Exeter, New Hampshire. Sometime prior to the 2014 European and World meets (summer and October), she ranked 40th among 73 Women World Grand Masters by world masterpoints (MP) and 23rd by placing points that do not decay over time.
In world championship teams-of-four competition for national women teams, McCallum played in the biennial Venice Cup tournament five times from 1989 to 2009. The 1989 team USA and 1993 team USA2 won the Cup. (From 1991 the Venice Cup field includes two U.S. representatives, the champion and runner-up called "USA1" and "USA2".)