Bart Williams may refer to:

• Bart Williams (actor) (1949–2015), American character actor and documentary filmmaker
• Bart Williams (rugby league), rugby league player

• New York State Office for People with Developmental Disabilities
• New York State of Mind
• New York State Parks
• New York State Parkway System
• New York State Police Troop C scandal
• New York State public-benefit authorities
• New York State public benefit authorities
• New York State public benefit corporation
• New York State public-benefit corporations
• New York state public-benefit corporations
• New York State Public High School Athletic Association
• New York State Reference Markers
• New York State Reference Route 961F
• New York State Reference Route 962J
• New York State Reference Route 983T
• New York State Reference Route 983W
• New York State Reference Route 990V
• New York State Regents
• New York State Register of Historic Places
• New York State Rifle and Pistol Association
• New york state rifle and pistol association
• New York State Rifle & Pistol Association
• New York State Route
• New York State Route 1
• New York State Route 10