BSFS

BSFS may refer to:


 * Bachelor of Science in Foreign Service, an undergraduate degree offered by Georgetown University's Walsh School of Foreign Service
 * Baltimore Science Fiction Society, a literary organization in Baltimore, Maryland, United States
 * Bristol stool scale, also known as the Bristol Stool Form Scale, which helps communication about stools in health care
 * British-Soviet Friendship Society, a former organization in Britain (1946–1991)