Diamond, Illinois.
Typical home $308,669 (+3.4% in a year). Chicago-Naperville-Elgin, IL-IN-WI metro.
to buy the typical home at today's mortgage rate — +$805 (+99%) since Jan 2020.
- 1 year
- Up $10,073 +3%
- $298,597$308,669 since Sep 2025
- 5 years
- Up $56,576 +22%
- $252,093$308,669 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.
- Diamond$1,620
- Illinois$1,553
- United States$1,922
At the last five years' pace, a typical home here doubles in price every 17 years.
Typical home values in Diamond, IL rose 3.4% over the past year — faster than the nation's +1.2%.
Living in Diamond, Grundy County, Illinois
Diamond is a village of 2,640 people in Grundy County. Half its households earn more than $73,201 a year and half less, against $92,235 across Grundy County; 10% of its people live below the poverty line. 80% of its homes are lived in by their owners and 20% 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 schools and health care, then shops.
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 It can be wrong or out of date.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. Diamond is a village in Grundy County where most homes are lived in by their owners, and the population is younger than in many small towns. Household incomes sit below the county's, and fewer adults hold a four-year degree than in much of the country. 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 mainly in schools, hospitals and social care, in shops, in the building trades and in professional and business services. Across Grundy County, some of the largest workplaces are Morris Hospital, Minooka CCSD Schools and Constellation, which runs nuclear power generation. The typical commute is moderate, and very few people work from home.
Things to do. The Kankakee River and the Des Plaines River are both a short drive away, as is Midewin National Tallgrass Prairie, a protected area of open prairie. Channahon State Park, also a short drive off, is another protected area worth a visit. Farther afield, Chicagoland Speedway is a race track a longer drive away.
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- 1,137households
- 13%of adults have a degree
- 10%below the poverty line
- 26 mintypical commute
- 3%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 32° and lows near 17°; warmest in July, with highs near 85° and lows near 65°. About 18 inches of snow and 37 inches of rain and melted snow a year.
Average daily high and low, 1991–2020, at the Channahon Dresden Isl Dam weather station, 8 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; Diamond has none 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
- TornadoesVery high
- Inland floodingVery high
- Strong windRelatively high
- Winter weatherRelatively moderate
- Heat wavesRelatively moderate
FEMA’s National Risk Index (December 2025) rates the risk each natural hazard poses to the people, buildings and farms in Diamond’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.
Diamond home values
Zillow measures a city over its municipal boundary. Against the state and national figures, mid-tier homes, smoothed and seasonally adjusted.
- Diamond$308,669
- 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.
- Diamond5
Zip codes with a Diamond address
A different geography, not a breakdown. The figure above covers the municipality; these zips cover everywhere the Post Office calls Diamond — often including townships beyond the city limits. Both come straight from Zillow, and they are not expected to average out.
Zillow publishes no zip-level series with this city on the address.