ZIP code · London Mills · Illinois · United States
ZIP code 61544 — London Mills
ZIP code 61544 serves London Mills, Illinois.
- Postal code
- 61544Single source Value from one source, not cross-checked.
- City
- London Mills
- County
- Fulton FIPS 17057
- State
- Illinois
- Country
- United States
- Coordinates
- 40.6950, -90.2616 — precision precise (locality)
View on OpenStreetMap - Population
- 815 (ZCTA, ACS 5-year)
- Population density
- 21 / sq mi
- Land area
- 39.7 sq mi (102.9 km²) (ZCTA, ACS 5-year)
- Median household income
- $79,333
- Per-capita income
- $43,410
- Median age
- 34.8
- Households
- 292
- Housing units
- 365
- Median home value
- $95,700
- Median gross rent
- $920 / month
- Congressional district
- IL-17 (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
- 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 61544 with another ZIP · ZIPs within 25 miles · distance from 61544
Map of ZIP code 61544
Climate — monthly normals
Warmest month Jul (avg high 84°F), coldest Jan (avg low 13°F).
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Avg high °F | 31 | 36 | 48 | 62 | 72 | 81 | 84 | 82 | 77 | 64 | 49 | 36 |
| Avg low °F | 13 | 17 | 26 | 37 | 49 | 59 | 62 | 60 | 51 | 40 | 29 | 20 |
| Precip in | 1.8 | 1.8 | 2.4 | 3.6 | 5.0 | 4.4 | 4.2 | 3.7 | 3.6 | 2.9 | 2.4 | 1.9 |
NOAA 1991–2020 climate normals from the nearest station: AVON (9.8 mi) · NOAA NCEI
Places in ZIP 61544
- 1 schools
- 1 parks
- 1 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