Diamond is a village in Grundy County, Illinois, home to about 2,984 people across 1.9 square miles. It has no ZIP code of its own: it’s part of 60416 and 60481.
Homes sold for a median of $198 per square foot across 2 ZIP codes in the three months ending August 2026, and all of them were seller’s markets.
Mostly Coal City; part is in Diamond
Mostly Wilmington; part is in Diamond
Each card is that ZIP code’s whole market, including any part outside Diamond. Seller’s market: under 4 months of supply; buyer’s market: over 6. Methodology
We’re writing up Diamond’s story and what everyday life there is like, for people thinking about moving in.
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| Nearest major airport | Chicago Midway International Airport (MDW)43 miles away |
|---|---|
| Nearest city of 250,000+ | Chicago, IL47 miles away |
Straight-line distances from the center of Diamond; driving is longer.
Source: Airports from OurAirports (scheduled passenger service); city centers and populations from the U.S. Census Bureau.
Source: Members of Congress from the congress-legislators project; districts from the Census Bureau’s relationship files; governor and mayor from Wikidata.
Diamond had 2,640 residents in the 2020 census, up 90% since 2000.
It’s the 427th largest of 1,450 towns in Illinois by population.
Grundy County grew from 24,136 residents in 1900 to 52,533 in 2020.
Grundy County, 1900–2020
Source: U.S. Census Bureau decennial censuses (counties 1900–1990 from the Bureau’s historical county file).
Average highs peak around 85°F in summer, and winter lows average 17°F. About 37.5 inches of rain and melted snow fall in a typical year, with about 18 inches of snow.
Source: NOAA 1991–2020 climate normals, Channahon Dresden Isl Dam, IL weather station (7 miles away).
17,169 jobs at 1,202 businesses in Grundy County. The biggest industries by employees:
Source: U.S. Census Bureau County Business Patterns 2023 (private employers; jobs counted where people work).
85 doctors and other health care providers list an office in Diamond’s ZIP codes.
Nearest hospitals
Providers with an office here
| Primary care doctors | 9 |
|---|---|
| Specialist doctors | 2 |
| Dentists | 6 |
| Nurse practitioners and physician assistants | 16 |
| Mental health providers | 28 |
| Physical and occupational therapists | 11 |
| Optometrists | 5 |
| Chiropractors | 8 |
| Pharmacies | 5 |
Source: Hospitals from CMS Hospital General Information (ratings are CMS overall star ratings); straight-line distances; providers from the CMS National Plan and Provider Enumeration System (NPPES), by practice address and primary specialty.
Parks (1 nearby)
Grocery stores
Libraries
Museums
Counts are within about 1 mile of the center of town.
Source: Map data © OpenStreetMap contributors (openstreetmap.org/copyright), as mapped by volunteers; it can miss places or include closed ones.
Public schools here are run by Wilmington CUSD 209U, Coal City CUSD 1, S Will Co Coop for Spec Ed. Check each district’s attendance zones for a specific address.
| School | Grades | Students | Type | Distance |
|---|---|---|---|---|
| Bruning Elem SchoolWilmington | Pre-K–1 | 222 | Public | 5.6 mi |
| Coal City Early Childhood CenterCoal City | Pre-K–1 | 437 | Public | 3.2 mi |
| Coal City Elem SchoolCoal City | 2–3 | 302 | Public | 2.0 mi |
| L J Stevens Intermediate SchoolWilmington | 2–5 | 353 | Public | 5.7 mi |
| Coal City Intermediate SchoolCoal City | 4–5 | 294 | Public | 1.8 mi |
| Coal City Middle SchoolCoal City | 6–8 | 454 | Public | 3.0 mi |
| Wilmington Middle SchoolWilmington | 6–8 | 254 | Public | 5.7 mi |
| Coal City High SchoolCoal City | 9–12 | 642 | Public | 2.7 mi |
| Wilmington High SchoolWilmington | 9–12 | 432 | Public | 6.1 mi |
| SOWIC Education CenterWilmington | — | — | Special Education | 6.1 mi |
| SOWIC-EC WilmingtonWilmington | — | — | Special Education | 5.6 mi |
| SOWIC-Educ & Life Skills-WilmingtWilmington | — | — | Special Education | 6.1 mi |
Source: U.S. Department of Education, NCES: Common Core of Data (2024-2025) for public schools. Listed by address; we don’t rate schools.
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Shares ZIP codes with Wilmington, Coal City, Braidwood, Custer Park, Lakewood Shores, Rest Haven, Carbon Hill, Symerton, Ritchie and Lorenzo.
Town boundaries don’t always match ZIP codes: a ZIP code can cross into neighboring towns, and a town can share a ZIP code with its neighbors. Facts describe the town itself; market figures describe whole ZIP codes.