Glenpool is a city in Tulsa County, Oklahoma, United States. It is part of the Tulsa Metropolitan Statistical Area. As of 2020, the population was 14,040, which represented an increase of 29.9% since the 2010 census, which reported the total population as 10,808. Glenpool is notable because the discovery of oil in 1905, which caused an economic boom that propelled the growth of Tulsa and its surroundings.