Traill may refer to:

• Traill (surname), including a list of people with the name
• Traill County, North Dakota, a county in the U.S.
• Traill International School, in Bangkok, Thailand
• Traill Island, in eastern Greenland
• 'Traill', a cultivar of barley
• Kapp Traill, headland at the southern part of Jan Mayen in Norway named after Thomas Stewart Traill

• All pages with titles containing Traill
• Trail (disambiguation)
• Miss Traill's House, historic property in Bathurst, Australia
• Mr. Perrin and Mr. Traill, a 1911 novel and 1948 film
• Traill's flycatcher, supposed bird species