Koontz Lake is a community in LaPorte County, Indiana, home to about 1,182 people across 3.4 square miles. It has no ZIP code of its own: it’s part of 46574.
Homes sold for a median of $136 per square foot in the three months ending August 2026, a seller’s market.
Mostly Walkerton; part is in Koontz Lake
Each card is that ZIP code’s whole market, including any part outside Koontz Lake. Seller’s market: under 4 months of supply; buyer’s market: over 6. Methodology
We’re writing up Koontz Lake’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)69 miles away |
|---|---|
| Closer regional airport | South Bend International Airport (SBN)19 miles away |
| Nearest city of 250,000+ | Chicago, IL67 miles away |
Straight-line distances from the center of Koontz Lake; 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.
Koontz Lake had 1,667 residents in the 2020 census, up 7% since 2000.
It’s the 310th largest of 693 towns in Indiana by population.
LaPorte County grew from 38,386 residents in 1900 to 112,417 in 2020.
LaPorte County, 1900–2020
Source: U.S. Census Bureau decennial censuses (counties 1900–1990 from the Bureau’s historical county file).
Average highs peak around 84°F in summer, and winter lows average 17°F. About 40.2 inches of rain and melted snow fall in a typical year, with about 55 inches of snow.
Source: NOAA 1991–2020 climate normals, Plymouth, IN weather station (12 miles away).
34,909 jobs at 2,297 businesses in LaPorte County. The biggest industries by employees:
Source: U.S. Census Bureau County Business Patterns 2023 (private employers; jobs counted where people work).
6 doctors and other health care providers list an office in Koontz Lake.
Nearest hospitals
Providers with an office here
| Primary care doctors | 1 |
|---|---|
| Dentists | 1 |
| Nurse practitioners and physician assistants | 1 |
| Mental health providers | 2 |
| Chiropractors | 1 |
| Pharmacies | 1 |
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 (2 nearby)
Libraries (1 nearby)
Museums (1 nearby)
Counts are within about 1.5 miles 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 John Glenn School Corporation. Check each district’s attendance zones for a specific address.
| School | Grades | Students | Type | Distance |
|---|---|---|---|---|
| Walkerton Elementary SchoolWalkerton | Pre-K–6 | 589 | Public | 0.4 mi |
| Harold C Urey Middle SchoolWalkerton | 7–8 | 301 | Public | 0.3 mi |
| John Glenn High SchoolWalkerton | 9–12 | 629 | Public | 0.7 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 Walkerton and Fish Lake.
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.