Places
;United States * Thayer, Illinois * Thayer, Indiana * Thayer, Iowa * Thayer, Kansas * Thayer, Michigan * Thayer, Missouri * Thayer, Nebraska * Thayer, West Virginia * Thayer County, Nebraska * Thayer Street, Providence, Rhode Island * Thayer Township, Thurston County, Nebraska * Mount Thayer, a mountain in the Santa Cruz Mountains of CaliforniaEducation
;United States * Thayer Academy in Braintree, Massachusetts * Thayer Hall, a Harvard University dormitory * Thayer Learning Center, Kidder, Missouri *Other
* Thayer (name), including a list of people with the name * Thayer's gull * Thayer Valve, a valve for trombones * C.A. Thayer, a schooner preserved at the San Francisco Maritime National Historical Park.See also
* Justice Thayer (disambiguation) {{disambiguation