Castle Rock is a town in Grant County, Wisconsin, home to about 353 people across 36 square miles. It has no ZIP code of its own: it’s part of 53543, 53569 and 53573.
Homes sold for a median of $166 per square foot across 3 ZIP codes in the three months ending August 2026, and 1 of 3 were seller’s markets.
Mostly Highland Village; part is in Castle Rock
Mostly Montfort Village (Grant County); part is in Castle Rock
Mostly Muscoda Village (Grant County); part is in Castle Rock
Each card is that ZIP code’s whole market, including any part outside Castle Rock. Seller’s market: under 4 months of supply; buyer’s market: over 6. Methodology
We’re writing up Castle Rock’s story and what everyday life there is like, for people thinking about moving in.
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| Nearest major airport | General Mitchell International Airport (MKE)128 miles away |
|---|---|
| Closer regional airport | Dubuque Regional Airport (DBQ)52 miles away |
| Nearest city of 250,000+ | Madison, WI50 miles away |
| Nearest city of 1 million+ | Chicago, IL166 miles away |
Straight-line distances from the center of Castle Rock; 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.
Castle Rock had 240 residents in the 2020 census, down 24% since 2000.
It’s the 1639th largest of 1,889 towns in Wisconsin by population.
Grant County grew from 38,881 residents in 1900 to 51,938 in 2020.
Grant 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 10°F. About 34.1 inches of rain and melted snow fall in a typical year.
Source: NOAA 1991–2020 climate normals, Boscobel Ap, WI weather station (13 miles away).
13,342 jobs at 1,177 businesses in Grant 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 Castle Rock’s ZIP codes.
Nearest hospitals
Providers with an office here
| Nurse practitioners and physician assistants | 3 |
|---|---|
| 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 (1 nearby)
Grocery stores (1 nearby)
Libraries
Counts are within about 4 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 Highland School District, Riverdale School District. Check each district’s attendance zones for a specific address.
| School | Grades | Students | Type | Distance |
|---|---|---|---|---|
| Highland Community ElementaryHighland | Pre-K–5 | 124 | Public | 6.0 mi |
| Riverdale ElementaryMuscoda | Pre-K–6 | 337 | Public | 4.3 mi |
| Highland Community MiddleHighland | 6–8 | 58 | Public | 6.0 mi |
| Riverdale AcademyMuscoda | 6–12 | 14 | Alternative Education | 4.3 mi |
| Riverdale Junior HighMuscoda | 7–8 | 88 | Public | 4.3 mi |
| Highland Community HighHighland | 9–12 | 94 | Public | 6.0 mi |
| Riverdale HighMuscoda | 9–12 | 192 | Public | 4.3 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 Muscoda Village (Grant County), Highland Village, Highland Town (Iowa County), Muscoda Town, Montfort Village (Grant County), Eagle Town (Richland County), Wingville, Orion, Pulaski Town, Dayton Town (Richland County), Eden Town (Iowa County), Montfort Village (Iowa County), Linden Town, Muscoda Village (Iowa County) and Mifflin.
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.