ZIP code · Mill Creek · Oklahoma · United States
ZIP code 74856 — Mill Creek
ZIP code 74856 serves Mill Creek, Oklahoma.
- Postal code
- 74856Single source Value from one source, not cross-checked.
- City
- Mill Creek
- County
- Johnston FIPS 40069
- State
- Oklahoma
- Country
- United States
- Coordinates
- 34.3098, -96.7884 — precision precise (locality)
View on OpenStreetMap - Population
- 794 (ZCTA, ACS 5-year)
- Population density
- 4 / sq mi
- Land area
- 188.2 sq mi (487.3 km²) (ZCTA, ACS 5-year)
- Median household income
- $65,250
- Per-capita income
- $32,950
- Median age
- 50.3
- Households
- 261
- Housing units
- 312
- Median home value
- $121,900
- Median gross rent
- $875 / month
- Congressional districts
- OK-2 (also OK-4) (119th Congress)
- USDA hardiness zone
- 7b (5 to 10 °F)Planting / growing zone from the 2023 USDA Plant Hardiness Zone Map: average annual extreme minimum temperature, 1991–2020.
- Time zone
- America/Chicago (UTC−6 / UTC−5 DST)
- Area code
- 580Telephone area codes serving this ZIP (NANPA central-office assignments). A ZIP and an area code are different boundaries; at a border both codes may apply.
Tools: compare 74856 with another ZIP · ZIPs within 25 miles · distance from 74856
Map of ZIP code 74856
Climate — monthly normals
Warmest month Aug (avg high 94°F), coldest Jan (avg low 30°F).
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Avg high °F | 52 | 56 | 65 | 72 | 79 | 88 | 93 | 94 | 86 | 75 | 64 | 54 |
| Avg low °F | 30 | 34 | 42 | 50 | 59 | 68 | 71 | 70 | 63 | 51 | 40 | 32 |
NOAA 1991–2020 climate normals from the nearest station: TISHOMINGO 6N MESONET (6.5 mi) · NOAA NCEI
Places in ZIP 74856
- 1 schools
Places mapped inside this ZIP’s ZCTA area in OpenStreetMap. OSM is community-maintained: counts reflect what has been mapped, and completeness varies by area — treat them as at-least figures. © OpenStreetMap contributors (ODbL) · Methodology
About this page
US ZIP codes have five digits. They are postal routing areas, not administrative boundaries: a ZIP can span more than one city or county, and the city shown is the primary USPS name for that code.
GeoNames · U.S. Census Bureau (ACS) · U.S. Census Bureau · NOAA NCEI · usda-phzm. Data generated on 2026-08-21. Methodology · Report an error on this page