Olpe is a city located in Lyon County Kansas. With a 2020 population of 531, it is the 270th largest city in Kansas and the 13055th largest city in the United States . Olpe is currently declining at a rate of -0.38% annually and its population has decreased by -2.75% since the most recent census, which recorded a population of 546 in 2010. Olpe reached it's highest population of 546 in 2010. Spanning over 1 miles, Olpe has a population density of 757 people per square mile.
The average household income in Olpe is $67,618 with a poverty rate of 3.47%. The median rental costs in recent years comes to $904 per month, and the median house value is $133,300. The median age in Olpe is 37.9 years, 41.6 years for males, and 35.1 years for females.