Calera is a town in Bryan County, Oklahoma, United States, located five miles south of Durant and 10 miles north of the Oklahoma-Texas state line. The population was 2,906 at the 2020 census, an increase of 34.2 percent over the figure of 2,164 recorded in 2010 indicating that Calera is experiencing larger growth than Durant and other surrounding areas. It is part of the Durant Micropolitan Area, as well as being part of the Texoma region.

Texoma is an interstate region in the United States, split between Oklahoma and Texas. The name is a portmanteau of Texas and Oklahoma. Businesses use the term in their names to describe their intended service area. This includes 8 counties with a population estimate of 319,455.