Eileen Ermita-Buhain (born May 12, 1969) is a Filipino politician. A member of the Lakas-CMD Party, she has been elected to three terms as a Member of the House of Representatives of the Philippines, representing the 1st District of Batangas. She first won election to Congress in 2001, and was re-elected in 2004 and 2007.
Ermita-Buhain is married to the swimmer and former Olympian Eric Buhain, who currently serves as Chairman of the Games and Amusement Board. Her father, Eduardo, has served as Executive Secretary of the administration of President Gloria Macapagal-Arroyo since 2004.