Spencer is a city located in Oklahoma. With a 2020 population of 3,915, it is the 90th largest city in Oklahoma and the 5464th largest city in the United States. Spencer is currently declining at a rate of -0.84% annually but its population has increased by 0.08% since the most recent census, which recorded a population of 3,912 in 2010. Spencer reached it's highest population of 4,064 in 1980. Spanning over 5 miles, Spencer has a population density of 729 people per square mile.
The average household income in Spencer is $50,683 with a poverty rate of 14.98%. The median rental costs in recent years comes to $643 per month, and the median house value is $75,300. The median age in Spencer is 46 years, 39.3 years for males, and 51.4 years for females. For every 100 females there are 101.1 males.