Ainsworth may refer to:
Places
;Canada
- Ainsworth Hot Springs, British Columbia
;United Kingdom
- Ainsworth, Greater Manchester, England
;United States
- Ainsworth, Indiana
- Ainsworth, Iowa
- Ainsworth, Nebraska
- Ainsworth, Wisconsin
- Ainsworth, Washington, ghost town
- Ainsworth State Park, Oregon
People
- Ainsworth (surname)
Ships
- City of Ainsworth, a pioneer sternwheeler from British Columbia; its deep-water wreck is a heritage site
Other uses
- Ainsworth baronets