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.

Bryan County is a county in the U.S. state of Oklahoma. As of the 2020 census, the population was 46,067. Its county seat is Durant. It is the only county in the United States named for Democratic politician William Jennings Bryan.