The median home value in Swansea, IL is $271,720 as of 2026-06-30, up 1.53% from a year earlier.
Median Home Value
$271,720
Year-over-Year
+1.53%
Population
14,515
Swansea ranks #175 of 279 Illinois cities tracked here by median home value, and sits 14.7% below the state's city median of $318,423. It sits in Saint Clair County, where the county-wide median is $180,981.
Swansea police recorded a violent crime rate of 41 per 100,000 residents in 2024 — lower than most cities that report to the FBI. Property crime runs at 744 per 100,000.
Reported by the city's own police department to the FBI's Uniform Crime Reporting Program (what this covers).
The median home value in Swansea is $271,720. That's up 1.53% from a year earlier. That is about 14.7% below the typical county in Illinois.
Homes in Swansea are more expensive than Saint Clair County as a whole, where the median is $180,981 — a difference of about 50.1%.
Swansea police reported 41 violent crimes per 100,000 residents, covering a population of about 14,515. Crime rates are one input among many — they vary block to block within a city, and this figure is a citywide average.