ZIP code · Alvin · Illinois · United States
ZIP code 61811 — Alvin
ZIP code 61811 serves Alvin, Illinois.
- Postal code
- 61811Single source Value from one source, not cross-checked.
- City
- Alvin
- County
- Vermilion FIPS 17183
- State
- Illinois
- Country
- United States
- Coordinates
- 40.3007, -87.6080 — precision precise (locality)
View on OpenStreetMap - Population
- 619 (ZCTA, ACS 5-year)
- Population density
- 23 / sq mi
- Land area
- 26.5 sq mi (68.7 km²) (ZCTA, ACS 5-year)
- Median household income
- $68,750
- Per-capita income
- $35,285
- Median age
- 50.3
- Households
- 286
- Housing units
- 327
- Median home value
- $122,800
- Median gross rent
- $900 / month
- Congressional district
- IL-2 (119th Congress)
- USDA hardiness zone
- 6a (-10 to -5 °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
- 217Telephone 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 61811 with another ZIP · ZIPs within 25 miles · distance from 61811
Map of ZIP code 61811
Climate — monthly normals
Warmest month Jul (avg high 85°F), coldest Jan (avg low 20°F).
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Avg high °F | 35 | 40 | 52 | 65 | 75 | 83 | 85 | 84 | 79 | 67 | 52 | 40 |
| Avg low °F | 20 | 23 | 32 | 42 | 52 | 61 | 65 | 63 | 56 | 44 | 34 | 25 |
| Precip in | 2.5 | 2.2 | 3.2 | 4.5 | 4.6 | 5.2 | 4.3 | 3.3 | 3.3 | 3.7 | 3.7 | 2.7 |
NOAA 1991–2020 climate normals from the nearest station: DANVILLE (11.4 mi) · NOAA NCEI
Places in ZIP 61811
- 1 playgrounds
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