Lake Petersburg, IL
Population 769 · Illinois
About Lake Petersburg, IL
Lake Petersburg is a small community in Illinois with a population of 769 residents. The median household income is $124,643 per year, which is above the national average. The median age in Lake Petersburg is 59 years.
Housing in Lake Petersburg has a median home value of $336,200 and median monthly rent of $0. Of the 388 total housing units, the majority are owner-occupied, with 346 owner-occupied and 0 renter-occupied units.
The unemployment rate in Lake Petersburg is 2.9% and the poverty rate is 0.0%. 40.6% of residents hold a bachelor's degree or higher. The average commute time is 34.6 minutes.
Cost of Living in Lake Petersburg, IL
Compared to national averages, Lake Petersburg has a median household income of $124,643 (66% above the national median of $75,149). Home values average $336,200, which is 37% above the national median. Monthly rent at $0 is 100% below the US average of $1,163. Within Illinois, Lake Petersburg's income is 66% above the state average of $75,072, and home values are 103% above the state median of $165,779.
Why Live in Lake Petersburg, IL?
Lake Petersburg offers a strong local economy with a median household income of $124,643, well above the national average, and rent that’s lower than the national average at $0/month, and a strong job market with an unemployment rate of just 2.9%. Additionally, the city features a well-educated community where 40.6% of residents hold a bachelor’s degree or higher, and a low poverty rate of 0.0%, better than the national average.
Lake Petersburg has a population of 769 with a median age of 59 years. Compare Lake Petersburg with other cities to see how it stacks up, or explore all cities in Illinois.
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Other Cities in Illinois
Data source: US Census Bureau ACS 5-Year Estimates. Last updated: 2026-04-05.
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Frequently Asked Questions about Lake Petersburg
What is the population of Lake Petersburg, IL?
The population of Lake Petersburg, IL is 769 according to the latest Census data.
What is the median household income in Lake Petersburg?
The median household income in Lake Petersburg, IL is $124,643 per year.
What is the median home value in Lake Petersburg?
The median home value in Lake Petersburg, IL is $336,200.
What is the average rent in Lake Petersburg?
The median monthly rent in Lake Petersburg, IL is $0.
What is the unemployment rate in Lake Petersburg?
The unemployment rate in Lake Petersburg, IL is 2.9%.