Lake Ellsworth Addition, Oklahoma

Lake Ellsworth Addition is a census-designated place (CDP) in Comanche County, Oklahoma, United States. It was first listed as a CDP prior to the 2020 census.

The CDP is in northern Comanche County, to the northeast of Lake Ellsworth, an impoundment on East Cache Creek, a south-flowing tributary of the Red River. It sits just north of the lake's Tony Creek inlet. It is 6 mi southeast of Apache, 5 mi west-northwest of Fletcher, and 5 mi north of Elgin.