Dunmore is a borough in Lackawanna County, Pennsylvania, adjoining Scranton. Dunmore was settled in 1835 and incorporated in 1862. Extensive anthracite coal, brick, stone, and silk interests had led to a rapid increase in the population to 8,315 in 1890, 12,583 in 1900, 17,615 in 1910, 20,250 in 1920, and 23,086 in 1940. The population was 14,057 at the 2010 census.