States · Illinois · Kendall County

Boulder Hill, Illinois.

A community in Kendall County, with no city government of its own. Zillow publishes no home prices for it: see Kendall County’s.

Living in Boulder Hill, Kendall County, Illinois

Boulder Hill, in Kendall County, had 8,394 people in the 2020 census. Half its households earn more than $80,377 a year and half less, against $111,601 across Kendall County; 9% of its people live below the poverty line. 86% of its homes are lived in by their owners and 14% are rented. Unemployment in Kendall County was 3.8% in August 2026, and the county had 1.7% more jobs in 2025 than the year before. The most residents work in schools and health care, then manufacturing.

People 8,394 in the 2020 census; median age 37.6
Household income $80,377 the median, give or take $7,541 · Kendall County: $111,601
Unemployment 3.8% Kendall County, August 2026; 4.5% a year before
Homes 86% lived in by their owners; 14% rented
  • 2,998households
  • 19%of adults have a degree
  • 9%below the poverty line
  • 27 mintypical commute
  • 11%work from home

What residents work in

  • Schools, hospitals and social care18%
  • Manufacturing14%
  • Professional and business services13%
  • Shops (retail)13%
  • Transport, warehouses and utilities9%
  • Building trades8%

Employed residents by industry, from the Census survey. Kendall County had 30,845 jobs in 2025, 1.7% more than the year before (Bureau of Labor Statistics).

Weather through the year

Average daily high and low for each month: coldest in January, 30° and 16°; warmest in July, 84° and 65° 20° 40° 60° 80° J 30° 16° F M A M J J 84° 65° A S O N D
Average daily high and low for each month: coldest in January, 30° and 16°; warmest in July, 84° and 65° 20° 40° 60° 80° J 30° 16° F M A M J J 84° 65° A S O N D

Coldest in January, with highs near 30° and lows near 16°; warmest in July, with highs near 84° and lows near 65°. About 28 inches of snow and 39 inches of rain and melted snow a year.

Average daily high and low, 1991–2020, at the Aurora weather station, 5 miles away (NOAA).

Largest workplaces in Kendall County

  1. Cusd 308School district2,238FTE
  2. Yorkville CUSD 115School district1,005FTE
  3. WalmartGeneral warehousing and storage718
  4. Menards"general warehousing and storage"656
  5. World Class Distribution, Inc Minooka HUbRefrigerated warehousing647
  6. Plano CUSD 88School district465FTE
  7. Mars Wrigley Confectionery USConfectionery, nonchocolate, manufacturing460
  8. Foodservice Chicago446

Staff on average in 2025, as each workplace reported it to OSHA with its injury records: 111 workplaces with 20 or more staff, 13,509 people in all across the county; Boulder Hill has none of its own. School districts come from the Common Core of Data (NCES, 2023–24); FTE marks full-time equivalent staff. Not listed: many offices and banks, which need not report to OSHA; military bases, whose staff OPM withholds; and, in about half the states, city and county governments.

Natural hazards

  1. Cold wavesVery high
  2. TornadoesRelatively high
  3. Inland floodingRelatively high
  4. Strong windrelatively high in parts of Boulder HillRelatively moderate
  5. Winter weatherRelatively moderate

FEMA’s National Risk Index (December 2025) rates the risk each natural hazard poses to the people, buildings and farms in Boulder Hill’s census tracts, against the rest of the country; all of them together, relatively moderate. It is meant for planning, not a substitute for a local risk assessment or a flood map: FEMA’s index.

From the U.S. Census Bureau’s 2020 census and its American Community Survey (2020–2024 five-year estimates), and the Bureau of Labor Statistics. A survey, so each figure has a margin of error, and figures it is not sure of are left out. More on Kendall County.