ZIP code · Rock City · Illinois · United States
ZIP code 61070 — Rock City
ZIP code 61070 serves Rock City, Illinois.
- Postal code
- 61070Single source Value from one source, not cross-checked.
- City
- Rock City
- County
- Stephenson FIPS 17177
- State
- Illinois
- Country
- United States
- Coordinates
- 42.4103, -89.4759 — precision precise (locality)
View on OpenStreetMap - Population
- 1,325 (ZCTA, ACS 5-year)
- Population density
- 41 / sq mi
- Land area
- 32.4 sq mi (83.8 km²) (ZCTA, ACS 5-year)
- Median household income
- $83,542
- Per-capita income
- $44,387
- Median age
- 52.4
- Households
- 509
- Housing units
- 600
- Median home value
- $173,000
- Median gross rent
- $845 / month
- Congressional district
- IL-16 (119th Congress)
- USDA hardiness zone
- 5a (-20 to -15 °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
- 815 (from the nearest rate centre)Telephone 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 61070 with another ZIP · ZIPs within 25 miles · distance from 61070
Map of ZIP code 61070
Climate — monthly normals
Warmest month Jul (avg high 82°F), coldest Jan (avg low 11°F).
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Avg high °F | 28 | 33 | 45 | 58 | 70 | 79 | 82 | 81 | 74 | 62 | 46 | 33 |
| Avg low °F | 11 | 15 | 26 | 36 | 48 | 59 | 62 | 60 | 51 | 39 | 28 | 18 |
| Precip in | 1.6 | 1.6 | 2.1 | 3.7 | 4.4 | 5.3 | 4.2 | 4.2 | 4.1 | 3.0 | 2.4 | 1.8 |
NOAA 1991–2020 climate normals from the nearest station: FREEPORT WASTE WTP (10.2 mi) · NOAA NCEI
Places in ZIP 61070
- 1 parks
- 1 post offices
- 3 places of worship
- 1 banks
- 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