Dennis, OK

Dennis is an unincorporated community and census-designated place in Delaware County, Oklahoma, near Grand Lake. The 2020 census counted 221 residents. The Dennis Post Office existed from March 25, 1914, until January 31, 1956. Dennis is said to be named for a local resident, Peter Dennis. Taken together, these details give a newcomer a usable picture of Dennis, where its history, geography, and current gathering places meet. For Dennis, the memorable detail is the way older history and current gathering places share one local map. Dennis is located in north-central Delaware County on the south side of Grand Lake. Dennis is 12 miles northwest of Jay, the county seat, and 16 miles by road southwest of Grove.