Hennessey is a city located in Oklahoma. With a 2020 population of 2,263, it is the 136th largest city in Oklahoma and the 7158th largest city in the United States. Hennessey is currently growing at a rate of 0.76% annually and its population has increased by 6.19% since the most recent census, which recorded a population of 2,131 in 2010. Spanning over 4 miles, Hennessey has a population density of 610 people per square mile.
The average household income in Hennessey is $77,762 with a poverty rate of 23.42%. The median rental costs in recent years comes to $680 per month, and the median house value is $109,000. The median age in Hennessey is 34.9 years, 34.5 years for males, and 36.8 years for females. For every 100 females there are 93.4 males.