Mill Creek is a town in Johnston County, Oklahoma, home to about 278 people across 0.4 square miles. Its ZIP code is 74856.
Homes sold for a median of $27 per square foot in the three months ending August 2026.
Mostly Mill Creek
Each card is that ZIP code’s whole market, including any part outside Mill Creek. Seller’s market: under 4 months of supply; buyer’s market: over 6. Methodology
We’re writing up Mill Creek’s story and what everyday life there is like, for people thinking about moving in.
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| Nearest major airport | OKC Will Rogers World Airport (OKC)88 miles away |
|---|---|
| Nearest city of 250,000+ | Plano, TX87 miles away |
| Nearest city of 1 million+ | Dallas, TX105 miles away |
Straight-line distances from the center of Mill Creek; 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.
Mill Creek had 293 residents in the 2020 census, down 14% since 2000.
It’s the 482nd largest of 827 towns in Oklahoma by population.
Johnston County grew from 16,734 residents in 1910 to 10,272 in 2020.
Johnston County, 1910–2020
Source: U.S. Census Bureau decennial censuses (counties 1900–1990 from the Bureau’s historical county file).
Average highs peak around 95°F in summer, and winter lows average 30°F. About 41.4 inches of rain and melted snow fall in a typical year, with about 2 inches of snow.
Source: NOAA 1991–2020 climate normals, Madill, OK weather station (15 miles away).
2,059 jobs at 171 businesses in Johnston County. The biggest industries by employees:
Source: U.S. Census Bureau County Business Patterns 2023 (private employers; jobs counted where people work).
2 doctors and other health care providers list an office in Mill Creek.
Nearest hospitals
Providers with an office here
| Dentists | 1 |
|---|---|
| Mental health providers | 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.
Public schools here are run by Mill Creek. Check each district’s attendance zones for a specific address.
| School | Grades | Students | Type | Distance |
|---|---|---|---|---|
| Mill Creek EsMill Creek | Pre-K–8 | 138 | Public | 6.5 mi |
| Mill Creek HsMill Creek | 9–12 | 62 | Public | 6.5 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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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.