Red Oak is a city in Montgomery County, Iowa, home to about 5,510 people across 3.9 square miles. Its ZIP code is 51566.
Homes sold for a median of $109 per square foot in the three months ending August 2026, a balanced market.
Each card is that ZIP code’s whole market, including any part outside Red Oak. Seller’s market: under 4 months of supply; buyer’s market: over 6. Methodology
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| Nearest major airport | Eppley Airfield (OMA)40 miles away |
|---|---|
| Nearest city of 250,000+ | Omaha, NE47 miles away |
| Nearest city of 1 million+ | Chicago, IL395 miles away |
Straight-line distances from the center of Red Oak; 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.
Red Oak had 5,596 residents in the 2020 census, down 10% since 2000.
It’s the 75th largest of 1,019 towns in Iowa by population.
Montgomery County grew from 17,803 residents in 1900 to 10,330 in 2020.
Montgomery County, 1900–2020
Source: U.S. Census Bureau decennial censuses (counties 1900–1990 from the Bureau’s historical county file).
Average highs peak around 86°F in summer, and winter lows average 13°F. About 37.3 inches of rain and melted snow fall in a typical year, with about 27 inches of snow.
Source: NOAA 1991–2020 climate normals, Red Oak, IA weather station (about a mile away).
3,420 jobs at 294 businesses in Montgomery County. The biggest industries by employees:
Source: U.S. Census Bureau County Business Patterns 2023 (private employers; jobs counted where people work).
70 doctors and other health care providers list an office in Red Oak.
Nearest hospitals
Providers with an office here
| Primary care doctors | 9 |
|---|---|
| Specialist doctors | 9 |
| Dentists | 5 |
| Nurse practitioners and physician assistants | 12 |
| Mental health providers | 12 |
| Physical and occupational therapists | 17 |
| Optometrists | 3 |
| Chiropractors | 3 |
| Pharmacies | 3 |
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 (7 nearby)
Grocery stores (2 nearby)
Pharmacies (1 nearby)
Libraries (1 nearby)
Museums (2 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.
Notable people born here
Source: Wikidata (wikidata.org), the free knowledge base; people are listed by place of birth.
Public schools here are run by Red Oak Comm School District. Check each district’s attendance zones for a specific address.
| School | Grades | Students | Type | Distance |
|---|---|---|---|---|
| Red Oak Early Childhood CenterRed Oak | Pre-K | 51 | Public | 0.4 mi |
| Inman Elementary SchoolRed Oak | K–6 | 461 | Public | 0.9 mi |
| Red Oak Junior/Senior High SchoolRed Oak | 7–12 | 420 | Public | 1.1 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 Coburg.
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.