Sullivan, IL

Data Snapshot: Sullivan, IL

Sullivan is a city in Illinois with a population of 4,253 residents based on U.S. Census Bureau ACS 2023 estimates. Median household income here reaches $62,845 per year, while the poverty rate sits at 9.2%. Typical homes in Sullivan are valued around $95,600, and the median resident age is 38.1 years. About 17.4% of adults hold a bachelor's degree or higher, while 57.4% of working-age residents are in the labor force.

Housing supply pressure shows in Census Building Permit Survey data: 21 residential units were authorized in 2024 (Slowing), down 19% from five years earlier. FBI UCR reporting places total crime at 141.8 incidents per 1,000 residents, above the national average, indicating elevated public-safety concerns. NOAA climate normals record an annual average temperature of 53.0°F with 41.6 inches of precipitation per year and 12.9 inches of snowfall.

On a cost-of-living index where 100 equals the national average, Illinois registers 100.0 (Near Average) per BEA Regional Price Parities 2024. HUD Fair Market Rent for a typical two-bedroom in this state is $1,063 per month. Average monthly utility bills run around $240 based on EIA 2023 residential energy data. FEMA's National Risk Index rates natural-hazard exposure at 54.5 out of 100 (Low).

According to the U.S. Census Bureau's 2023 American Community Survey (ACS) 5-year estimates, PlainCities renders standardized city-level demographic, income, education, employment, and housing indicators across more than 19,000 incorporated places nationwide. Population counts and median household income figures are sourced directly from Census Table B01003 and B19013 respectively, with poverty rates from B17001 and cost-of-living adjustments from the Bureau of Economic Analysis (BEA) Regional Price Parities (RPP) 2024 release. Every value displayed in this snapshot links back to the official upstream tables and is refreshed on the ACS annual release cadence (typically December of the survey year + 1).

Methodology: city boundaries follow the Census Bureau's place-level geography (incorporated places, census-designated places, and consolidated city-county governments), with FIPS codes ensuring consistent identifiers across decennial and annual surveys. Cost-of-living comparisons use BEA's Regional Price Parities (RPP) indexed to the national average (100), enabling cross-city purchasing-power comparisons. See our methodology page for full source attribution, refresh cadence, and known data quality limitations including margin-of-error disclosure and sample-size thresholds.