Oak Grove is a city located in Kentucky. With a 2020 population of 7,138, it is the 58th largest city in Kentucky and the 3905th largest city in the United States. Oak Grove is currently declining at a rate of -1.64% annually and its population has decreased by -4.69% since the most recent census, which recorded a population of 7,489 in 2010. Oak Grove reached it's highest population of 7,639 in 2012. Spanning over 11 miles, Oak Grove has a population density of 667 people per square mile.
The average household income in Oak Grove is $52,607 with a poverty rate of 20.59%. The median rental costs in recent years comes to $869 per month, and the median house value is $103,100. The median age in Oak Grove is 24.7 years, 24.2 years for males, and 25.5 years for females. For every 100 females there are 118.6 males.