The oil field was the richest the world had yet known, making more money than the California Gold Rush and Colorado Silver Rush combined and making Oklahoma known around the world for oil production. With the fall of oil prices in the 1980s many of the communities surrounding Tulsa, the "Oil Capital of the World" fell into deep recession, and Glenpool was not spared this fate. An annual celebration called "Black Gold Days" commemorates the glory years of Glenpool's history.
There were 2,761 households out of which 49.7% had children under the age of 18 living with them, 63.2% were married couples living together, 14.3% had a female householder with no husband present, and 18.5% were non-families. 15.7% of all households were made up of individuals and 3.8% had someone living alone who was 65 years of age or older. The average household size was 2.91 and the average family size was 3.25.
In the city the population was spread out with 33.5% under the age of 18, 8.6% from 18 to 24, 35.5% from 25 to 44, 16.8% from 45 to 64, and 5.7% who were 65 years of age or older. The median age was 30 years. For every 100 females there were 90.3 males. For every 100 females age 18 and over, there were 88.5 males.
The median income for a household in the city was $43,209, and the median income for a family was $47,093. Males had a median income of $32,377 versus $23,927 for females. The per capita income for the city was $16,868. About 6.2% of families and 6.4% of the population were below the poverty line, including 6.0% of those under age 18 and 6.3% of those age 65 or over.