ZIP code · Saint Charles · Iowa · United States
ZIP code 50240 — Saint Charles
ZIP code 50240 serves Saint Charles, Iowa.
- Postal code
- 50240Single source Value from one source, not cross-checked.
- City
- Saint Charles
- County
- Madison FIPS 19121
- State
- Iowa
- Country
- United States
- Coordinates
- 41.2924, -93.8242 — precision precise (locality)
View on OpenStreetMap - Population
- 2,299 (ZCTA, ACS 5-year)
- Population density
- 31 / sq mi
- Land area
- 75.3 sq mi (195 km²) (ZCTA, ACS 5-year)
- Median household income
- $110,027
- Per-capita income
- $51,133
- Median age
- 46.1
- Households
- 871
- Housing units
- 936
- Median home value
- $297,200
- Median gross rent
- $939 / month
- Congressional districts
- IA-3 (also IA-1) (119th Congress)
- USDA hardiness zone
- 5b (-15 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
- 641Telephone 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 50240 with another ZIP · ZIPs within 25 miles · distance from 50240
Map of ZIP code 50240
Climate — monthly normals
Warmest month Jul (avg high 84°F), coldest Jan (avg low 10°F).
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Avg high °F | 30 | 35 | 48 | 61 | 71 | 80 | 84 | 82 | 76 | 63 | 48 | 35 |
| Avg low °F | 10 | 13 | 25 | 35 | 48 | 58 | 62 | 59 | 51 | 38 | 26 | 16 |
| Precip in | 0.8 | 1.3 | 2.1 | 3.6 | 5.0 | 4.6 | 4.1 | 3.6 | 3.6 | 2.9 | 2.0 | 1.2 |
NOAA 1991–2020 climate normals from the nearest station: WINTERSET 1S (10.2 mi) · NOAA NCEI
Places in ZIP 50240
- 1 schools
- 1 pharmacies
- 1 restaurants & cafés
- 2 parks
- 1 libraries
- 1 post offices
- 6 places of worship
- 1 gas stations
- 1 police & fire stations
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