Browse / United States / Illinois / Boulder Hill
Boulder Hill
IllinoisCDP
Boulder Hill
Total population
8,989
Median home value
$238,700
Bachelor's+
Median income
$80,377
Air quality index
Demographic figures from US Census Bureau · ACS 5-year estimates. Overview below cites Wikipedia and may reference a different year.
City facts
Facts from Wikidata (CC0).
Overview
Boulder Hill is a census-designated place (CDP) in Oswego Township, Kendall County, Illinois, United States. According to the 2020 census, the population was 8,394. It is part of the Chicago metropolitan area on the Fox River, south of Aurora.
Read more on WikipediaHistory & geography
Geography
Boulder Hill is located at (41.7113530, -88.3351400). Up until the early 2000s, the Boulder Hill subdivision had a small development area, equating to almost a town square. The community itself has a strong identity, as the people from Boulder Hill are not classified as being from Montgomery or Oswego, two nearby larger towns. Postal service is provided to Boulder Hill via the Montgomery Post Office. While Boulder Hill is unincorporated and not part of the village of Montgomery, there is confusion due to Boulder Hill residents' mailing addresses including "Montgomery" as the designated address. Governmental services provided to Boulder Hill primarily come from either Kendall County or Oswego Township offices. The community has four churches, a grocery store, a small retail development, a gas station, three schools (two elementary and a middle school), a retirement facility, and the area used to have an automotive dealership. There is minimal vacant land left for development. The villages of Oswego and Montgomery have both expanded their communities up to the boundaries of Boulder Hill, so there is no room for further business expansion. Other than the Boulder Hill Market, most of the commercial businesses located in Boulder Hill are part of the village of Oswego. Being unincorporated, Boulder Hill's property taxes have risen in recent years as the various taxing bodies such as the Oswegoland Park District and the Oswego School District have expanded to keep up with the growth of adjacent communities such as Oswego. So while Boulder Hill was previously known for having low property taxes because it does not have its own government, that is no longer the case.
Excerpted from the corresponding Wikipedia article (CC BY-SA).
Demographics & economy
Race & ethnicity
Source: US Census Bureau — American Community Survey, 5-year estimates.
Geography
Coordinates & boundaries from the US Census TIGER/Line shapefiles.
Climate
Current forecast
Forecast for Boulder Hill, IL from NOAA NWS API.
Air quality
Current readings from Open-Meteo Air Quality API (Copernicus CAMS European reanalysis).
Industrial & pollution facilities
Natural hazard risk
Health (adults)
Age-adjusted prevalence estimates from CDC PLACES (latest release).
Walkability
Amenities nearby
Wildlife & biodiversity
Most-observed species
- American RobinTurdus migratorius Linnaeus, 1766 · Aves38,444
- Northern CardinalCardinalis cardinalis (Linnaeus, 1758) · Aves35,976
- Canada Goose (canadensis Group)Branta canadensis (Linnaeus, 1758) · Aves35,376
- MallardAnas platyrhynchos Linnaeus, 1758 · Aves33,001
- Red-winged BlackbirdAgelaius phoeniceus (Linnaeus, 1766) · Aves31,700
- Mourning DoveZenaida macroura (Linnaeus, 1758) · Aves28,939
- American GoldfinchSpinus tristis (Linnaeus, 1758) · Aves27,118
- Black-capped ChickadeePoecile atricapillus (Linnaeus, 1766) · Aves26,405
Citizen-science & research observations from the Global Biodiversity Information Facility (GBIF).
Schools
Largest nearby schools
- Oswego High SchoolHigh · Oswego · 2,901 students · 16.3:1 ratio
- Oswego East High SchoolHigh · Oswego · 2,836 students · 16.7:1 ratio
- Yorkville High SchoolHigh · Yorkville · 2,118 students · 16.4:1 ratio
- Traughber Jr High SchoolMiddle · Oswego · 1,135 students · 18.6:1 ratio
- Yorkville Middle SchoolMiddle · Yorkville · 1,105 students · 17.3:1 ratio
- Thompson Jr High SchoolMiddle · Oswego · 840 students · 15.8:1 ratio
- Lakewood Creek ElementaryElementary · Montgomery · 762 students · 20.1:1 ratio
- Murphy Junior High SchoolMiddle · Plainfield · 713 students · 14.6:1 ratio
Public K–12 schools within ~10 mi from Urban Institute Education Data Portal (NCES Common Core of Data, 2022).
Earthquake history
Most recent
- M 2.9 — 2026-07-0821 km ENE of Kenilworth, Illinois
- M 2.6 — 2025-03-156 km W of Dwight, Illinois
- M 3.1 — 2024-07-152 km WNW of Somonauk, Illinois
- M 3.6 — 2023-11-151 km SSW of Standard, Illinois
- M 2.9 — 2015-03-253 km WNW of Lake in the Hills, Illinois
- M 3.2 — 2013-11-041 km SSW of Lyons, Illinois
Events from the USGS Earthquake Catalog (global) (FDSN Event Web Service).
Photos
Sights & places nearby
Notable people from here








People born within ~10 km, from Wikidata (CC0). Click any name for their Wikipedia article.
Nearby places in Illinois
- Montgomery1.5 mi away · pop. 21,515
- Plainfield7.2 mi away
- Plano10.7 mi away
- Plattville12.4 mi away
- Kaneville12.9 mi away · pop. 523
- Elburn13.8 mi away · pop. 6,354
- Campton Hills17.1 mi away · pop. 10,877
- Lockport Heights17.2 mi away
- Glen Ellyn17.7 mi away · pop. 28,390
- Carol Stream17.8 mi away · pop. 39,460
- Minooka18.3 mi away · pop. 12,891
- Lily Lake18.5 mi away · pop. 1,293
Geography & sun
Elevation, sunrise/sunset and daylight from Open-Meteo. Solar climatology from NASA POWER.
Nearby airports
Public attention
Pageview totals from the Wikimedia Pageviews API.
Books about Boulder Hill


Search results from Open Library.
Recent natural events nearby
Ground air-quality sensors
Recently spotted species
Nearest stream gauge
Events
Gallery
Sources
- • Wikipedia
- • US Census Bureau (ACS 5-year estimates)
- • NOAA National Weather Service
- • Wikidata
- • Open-Meteo Air Quality (CAMS)
- • USGS Earthquake Catalog (global feed)
- • NCES via Urban Institute Education Data Portal
- • GBIF (Global Biodiversity Information Facility)
- • CDC PLACES
- • Open-Meteo / sunrise-sunset.org
- • Wikipedia Pageviews API
- • Open Library