St. Clairsville is a city located in Ohio. With a 2020 population of 4,934, it is the 255th largest city in Ohio and the 4786th largest city in the United States. St. Clairsville is currently declining at a rate of -0.78% annually and its population has decreased by -4.82% since the most recent census, which recorded a population of 5,184 in 2010. St. Clairsville reached it's highest population of 5,452 in 1980. Spanning over 2 miles, St. Clairsville has a population density of 2,040 people per square mile.
The average household income in St. Clairsville is $79,994 with a poverty rate of 7.56%. The median rental costs in recent years comes to $769 per month, and the median house value is $160,500. The median age in St. Clairsville is 50.5 years, 45.4 years for males, and 55.6 years for females. For every 100 females there are 90.9 males.