FSG

FSG can refer to: Finite state grammar Falling sand game Fishersgate railway station, a railway station in Sussex, England Fluorosilicate glass Focal segmental glomerulosclerosis Free Spirit Gathering, an American Pagan and Pantheist event United States Federal Sentencing Guidelines

== Organizations == Fellow of the Society of Genealogists Florida State Guard, active during World War II Folkestone School for Girls, in England Fortress Study Group, a British historical charity Free Standards Group, a defunct open-source standards organization