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

Businesses

• Facility Solutions Group, an American electrical engineering company
• Farrar, Straus and Giroux, an American book publisher
• Fenway Sports Group, an American sports investment company
• Flensburger Schiffbau-Gesellschaft, a German shipbuilder
• Frontier Services Group, a Hong Kong–based, Africa-focused security, aviation, and logistics company