ZIP code · Blandinsville · Illinois · United States
ZIP code 61420 — Blandinsville
ZIP code 61420 serves Blandinsville, Illinois.
- Postal code
- 61420Single source Value from one source, not cross-checked.
- City
- Blandinsville
- County
- McDonough FIPS 17109
- State
- Illinois
- Country
- United States
- Coordinates
- 40.5516, -90.8595 — precision precise (locality)
View on OpenStreetMap - Population
- 1,034 (ZCTA, ACS 5-year)
- Population density
- 15 / sq mi
- Land area
- 68.5 sq mi (177.4 km²) (ZCTA, ACS 5-year)
- Median household income
- $61,375
- Per-capita income
- $29,563
- Median age
- 40
- Households
- 431
- Housing units
- 514
- Median home value
- $81,800
- Median gross rent
- $850 / month
- Congressional district
- IL-15 (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
- 309Telephone 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 61420 with another ZIP · ZIPs within 25 miles · distance from 61420
Map of ZIP code 61420
Climate — monthly normals
Warmest month Jul (avg high 85°F), coldest Jan (avg low 15°F).
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Avg high °F | 32 | 37 | 49 | 62 | 72 | 81 | 85 | 83 | 77 | 64 | 49 | 37 |
| Avg low °F | 15 | 19 | 29 | 40 | 52 | 61 | 65 | 63 | 54 | 42 | 31 | 21 |
| Precip in | 1.6 | 1.8 | 2.4 | 3.9 | 5.2 | 4.9 | 4.2 | 3.4 | 3.8 | 3.1 | 2.5 | 2.0 |
NOAA 1991–2020 climate normals from the nearest station: LA HARPE (6.2 mi) · NOAA NCEI
Places in ZIP 61420
- 2 parks
- 1 libraries
- 1 post offices
- 4 places of worship
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