61081 ZIP Code, Sterling, IL
61081 is a ZIP code in Sterling, Illinois — mostly in Whiteside County (95% of its land), with smaller parts in Lee County. It covers 124 square miles of land. The closest ZIP codes are 61037, 61071 and 61051. 20,844 people live here in 8,884 households. With about 168 people per square mile it is lightly settled, and most homes are owner-occupied (73%). Median household income is $67,586, below the Illinois median of $83,390.
Quick facts
- Mailing city: Sterling, IL
- County: Whiteside County
- Land area: 124 sq mi
- Population: 20,844
- Median household income: $67,586
Key figures
| Measure | Value |
|---|---|
| Residents | 20,844 |
| Households | 8,884 |
| Median household income | $67,586 |
| Income per person | $38,370 |
| Median age | 43.3 |
| Homeowners | 72.8% |
| Median home value | $123,400 |
| Median rent | $870 |
| Bachelor's degree or higher | 22.2% |
| Average commute (minutes) | 19.9 |
| Households with kids under 18 | 26.8% |
| Moved in the past year | 5.2% |
| Below the poverty line | 12.2% |
| Broadband internet | 87.7% |
| Speak a non-English language at home | 10.3% |
Household income
| % of households | Value |
|---|---|
| <$10K | 4.9% |
| $10–15K | 4.9% |
| $15–25K | 6.9% |
| $25–35K | 9.0% |
| $35–50K | 14.5% |
| $50–75K | 14.9% |
| $75–100K | 13.0% |
| $100–150K | 19.3% |
| $150–200K | 8.1% |
| $200K+ | 4.7% |
Age
| % of all residents | Value |
|---|---|
| <10 | 11.7% |
| 10–19 | 11.3% |
| 20–24 | 6.4% |
| 25–34 | 10.6% |
| 35–44 | 12.0% |
| 45–54 | 13.1% |
| 55–64 | 12.5% |
| 65–74 | 13.0% |
| 75+ | 9.5% |
Tenure
| % of housing units | Value |
|---|---|
| Owned, with mortgage | 36.4% |
| Owned outright | 29.6% |
| Rented | 24.5% |
| Vacant | 9.6% |
Type of building
| % of housing units | Value |
|---|---|
| Detached house | 77.4% |
| Townhome | 1.6% |
| 2–4 units | 10.6% |
| 5–19 units | 4.4% |
| 20+ units | 5.4% |
| Mobile / other | 0.6% |
Businesses in 61081
490 business establishments with 10,763 employees (ZIP Codes Business Patterns 2023).
- Retail Trade: 82
- Health Care and Social Assistance: 60
- Other Services (except Public Administration): 58
- Accommodation and Food Services: 57
- Construction: 43
- Finance and Insurance: 34
- Manufacturing: 31
- Administrative and Support and Waste Management and Remediation Services: 27
EDDM carrier routes
See every USPS carrier route in 61081 with residential and business mailbox counts on the route map. Open the EDDM route map.
Nearby ZIP codes
- 61037 — Galt CDP, IL (4.4 mi)
- 61071 — Rock Falls city, IL (8.9 mi)
- 61051 — Milledgeville village, IL (9.3 mi)
- 61091 (10.4 mi)
- 61014 — Chadwick village, IL (11.5 mi)
- 61270 — Morrison city, IL (11.6 mi)
- 61261 — Lyndon village, IL (11.8 mi)
- 61064 — Polo city, IL (12.4 mi)
Areas that include 61081
- Sterling, IL ZIP codes — 1 ZIP code
- Como, IL ZIP codes — 1 ZIP code
- Galt, IL ZIP codes — 2 ZIP codes
- Coleta, IL ZIP codes — 1 ZIP code
- Whiteside County ZIP codes — 13 ZIP codes
- Illinois ZIP code data
Where it ranks
- No. 5 of 9: highest median household income in Whiteside County
- No. 5 of 9: highest share of households with children in Whiteside County
- No. 5 of 9: lowest median age in Whiteside County
- No. 5 of 9: highest median age in Whiteside County
- No. 5 of 8: fastest population growth in Whiteside County
Mail every home in 61081
Route counts on this page price as Full Service 6.5 × 9 postcards: we print, bundle by carrier route and hand the mailing to USPS. Prefer to take it to the Post Office yourself? Print only costs less and you pay postage at drop-off.
EDDM guides
ZIP code statistics describe the Census ZIP Code Tabulation Area (ZCTA) 61081, which approximates the USPS ZIP code area. Census figures: American Community Survey 5-year estimates, 2020–2024.
Frequently asked questions
- What city is 61081 in?
- 61081 is a Sterling, IL mailing address. By land area, 5% lies inside Sterling; the rest is outside any Census-defined city or community.
- What county is 61081 in?
- 61081 is mostly in Whiteside County (95% of its land), with smaller parts in Lee County.
- What is the population of 61081?
- About 20,844 people (±502), according to the Census Bureau's American Community Survey 5-year estimates for 2020–2024. The 2020 Census counted 21,064.
- What is the median household income in 61081?
- $67,586 (±$6,117), compared with $83,390 for Illinois as a whole. Half the households in the ZIP code earn more and half earn less.
- How many carrier routes and mailboxes are in 61081?
- EDDM2GO's stored route library does not include 61081 yet. The EDDM route map loads its carrier routes and mailbox counts when you search the ZIP code.
- What ZIP codes are near 61081?
- The closest, measured center to center: 61037 (4.4 mi, Galt), 61071 (8.9 mi, Rock Falls), 61051 (9.3 mi, Milledgeville), 61091 (10.4 mi), 61014 (11.5 mi, Chadwick) and 61270 (11.6 mi, Morrison).
This product uses the Census Bureau Data API but is not endorsed or certified by the Census Bureau.