Mazon, Illinois.
Typical home $275,682 (+3.2% in a year). Chicago-Naperville-Elgin, IL-IN-WI metro.
to buy the typical home at today's mortgage rate — +$700 (+94%) since Jan 2020.
- 1 year
- Up $8,548 +3%
- $267,135$275,682 since Sep 2025
- 5 years
- Up $49,426 +22%
- $226,257$275,682 since Sep 2021
Monthly payment to buy the typical home
Home value × that month's 30-year mortgage rate, 20% down, principal and interest. This is the line households feel: prices and rates compound each other.
- Mazon$1,447
- Illinois$1,553
- United States$1,922
At the last five years' pace, a typical home here doubles in price every 18 years.
Typical home values in Mazon, IL rose 3.2% over the past year — faster than the nation's +1.2%.
Living in Mazon, Grundy County, Illinois
Mazon is a village of 979 people in Grundy County. 81% of its homes are lived in by their owners and 19% are rented. Unemployment in Grundy County was 4.9% in August 2026, and the county had 2.7% more jobs in 2025 than the year before. The most residents work in shops, then schools and health care.
Written by AI Claude Sonnet 5.5 wrote this on 23 October 2026 from the figures here, a list of nearby places and what it knows. It can be wrong or out of date.
What it’s like
The place. Mazon is a small village in Grundy County, Illinois, where nearly everyone lives in a home they own. Homes are valued above what is typical for the county's smaller places, and fewer adults hold a four-year degree than in many communities. Winters are cold, with January the coldest month and a fair amount of snow, while July is warm, and the year brings a good deal of rain and melted snow.
Work. Residents work mostly in shops, in schools, hospitals and social care, in the building trades and in manufacturing. Across Grundy County, the largest workplaces include Morris Hospital, Minooka CCSD Schools and Constellation, which generates nuclear power. Commutes are of a moderate length, and very few people work from home.
Things to do. A short drive away are Mazon Creek, a protected area, and Gebhard Woods State Park, along with Heidecke Lake State Fish and Wildlife Area. A longer drive brings you to Starved Rock State Park, one of the best known parks in the state, and to the Kankakee River.
Report a mistake
- 519households
- 20%of adults have a degree
- 10%below the poverty line
- 24 mintypical commute
- 2%work from home
What residents work in
Employed residents by industry, from the Census survey. Grundy County had 22,954 jobs in 2025, 2.7% more than the year before (Bureau of Labor Statistics).
Weather through the year
Coldest in January, with highs near 31° and lows near 16°; warmest in July, with highs near 85° and lows near 65°. About 25 inches of snow and 39 inches of rain and melted snow a year.
Average daily high and low, 1991–2020, at the Morris Northwest weather station, 9 miles away (NOAA).
Largest workplaces in Grundy County
- Morris HospitalGeneral hospital1,182FTE
- Minooka CCSD 201School district706FTE
- ConstellationElectric power generation, nuclear690
- Costco WholesaleGeneral warehousing & storage685
- Costco WholesaleMeat processed from carcasses681
- ConstellationElectric power generation, nuclear657
- W.W. GraingerIndustrial supplies merchant wholesalers623
- D ConstructionRoad construction508
Staff on average in 2025, as each workplace reported it to OSHA with its injury records: 62 workplaces with 20 or more staff, 9,965 people in all across the county; Mazon has one of its own. Hospitals come from their Medicare cost reports (CMS, 2023) and school districts 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
- Cold wavesVery high
- Inland floodingRelatively high
- Strong windRelatively high
- TornadoesRelatively high
- Winter weatherRelatively moderate
FEMA’s National Risk Index (December 2025) rates the risk each natural hazard poses to the people, buildings and farms in Mazon’s census tracts, against the rest of the country; all of them together, relatively high. 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 Grundy County and the Chicago-Naperville-Elgin, IL-IN-WI metro.
Mazon home values
Zillow measures a city over its municipal boundary. Against the state and national figures, mid-tier homes, smoothed and seasonally adjusted.
- Mazon$275,682
- Illinois$295,943
- United States$366,157
When this market ran hot
Each cell is that month's year-on-year home-value growth. Read left to right, top row is the latest year — the 2021–22 band is the boom.
Market heat, inside the city limits
Homes for sale
Active for-sale inventory. More supply hands power to buyers.
Not enough data to draw this yet.
New listings per month
Sellers arriving at the market.
Not enough data to draw this yet.
Zip codes with a Mazon address
A different geography, not a breakdown. The figure above covers the municipality; these zips cover everywhere the Post Office calls Mazon — often including townships beyond the city limits. Both come straight from Zillow, and they are not expected to average out.