50670 ZIP Code, Shell Rock, IA
50670 is a ZIP code in Shell Rock, Iowa in Butler County. It covers 55 square miles of land. The closest ZIP codes are 50647, 50660 and 50619. 2,270 people live here in 803 households. It is rural, with fewer than 100 people per square mile, and most homes are owner-occupied (87%). Median household income is $84,679, above the Iowa median of $75,059; 41% of households have children under 18.
Quick facts
- Mailing city: Shell Rock, IA
- County: Butler County
- Land area: 55 sq mi
- Population: 2,270
- Median household income: $84,679
- Carrier routes: 2 (618 homes)
Key figures
| Measure | Value |
|---|---|
| Residents | 2,270 |
| Households | 803 |
| Median household income | $84,679 |
| Income per person | $39,355 |
| Median age | 41 |
| Homeowners | 87.2% |
| Median home value | $171,500 |
| Median rent | $931 |
| Bachelor's degree or higher | 24.4% |
| Average commute (minutes) | 23.2 |
| Households with kids under 18 | 40.6% |
| Moved in the past year | 5.0% |
| Below the poverty line | 4.9% |
| Broadband internet | 88.3% |
| Speak a non-English language at home | 4.1% |
Household income
| % of households | Value |
|---|---|
| <$10K | 1.1% |
| $10–15K | 3.0% |
| $15–25K | 1.1% |
| $25–35K | 10.7% |
| $35–50K | 6.0% |
| $50–75K | 19.2% |
| $75–100K | 21.3% |
| $100–150K | 22.7% |
| $150–200K | 7.0% |
| $200K+ | 8.0% |
Age
| % of all residents | Value |
|---|---|
| <10 | 12.4% |
| 10–19 | 15.9% |
| 20–24 | 4.9% |
| 25–34 | 9.6% |
| 35–44 | 16.8% |
| 45–54 | 11.4% |
| 55–64 | 8.4% |
| 65–74 | 11.3% |
| 75+ | 9.0% |
Tenure
| % of housing units | Value |
|---|---|
| Owned, with mortgage | 57.2% |
| Owned outright | 24.0% |
| Rented | 11.2% |
| Vacant | 7.6% |
Type of building
| % of housing units | Value |
|---|---|
| Detached house | 90.1% |
| Townhome | 0.0% |
| 2–4 units | 6.4% |
| 5–19 units | 3.2% |
| 20+ units | 0.2% |
| Mobile / other | 0.0% |
Businesses in 50670
35 business establishments with 1,040 employees (ZIP Codes Business Patterns 2023).
- Manufacturing: 7
- Construction: 5
- Transportation and Warehousing: 4
- Retail Trade: 3
- Health Care and Social Assistance: 3
- Accommodation and Food Services: 3
- Other Services (except Public Administration): 3
EDDM carrier routes
50670 has 2 USPS carrier routes with 618 residential and 18 business mailboxes. Open the EDDM route map.
Carrier routes in 50670
50670 has 2 USPS carrier routes (2 rural (R)) with 618 residential and 18 business mailboxes. Routes range from 145 homes (R002) to 473 homes (R201); the median route has 309 homes. The Census counted 803 households in 50670 (2020–2024 average); USPS counts current mailboxes, including new and vacant homes.
| Homes per route | Routes |
|---|---|
| 1–249 | 1 |
| 250–499 | 1 |
| 500–749 | 0 |
| 750–999 | 0 |
| 1,000–1,499 | 0 |
| 1,500+ | 0 |
Best routes in 50670 for…
Most businesses
For B2B offers: office supplies, cleaning, IT, catering and commercial services.
- Route R201 — USPS business mailboxes 9, 473 homes
- Route R002 — USPS business mailboxes 9, 145 homes
Select these 2 routes on the route map
Every carrier route in 50670
| Route | Type | Homes | Businesses | Est. median income | Est. owners | Est. families with kids | Est. moved in past year |
|---|---|---|---|---|---|---|---|
| R002 | Rural | 145 | 9 | $97,649 | — | — | — |
| R201 | Rural | 473 | 9 | $101,130 | — | — | — |
Income, owners, families and movers are estimates for each route (how we estimate them); mailbox counts are current USPS figures. Open 50670 on the EDDM route map.
How route demographics are estimated
Mailbox counts come from USPS; demographics are estimates
The number of homes and businesses on each carrier route is the current USPS EDDM count. The Census Bureau does not publish figures for carrier routes, so income, homeownership, ages, families, movers and housing age on a route are EDDM2GO estimates built from Census block groups (neighborhood areas of roughly 600 to 3,000 people).
How a route gets its figures: the block-group length-share method
We trace each route's streets every 25 meters and record which block group each stretch falls in. The route's homes are spread along its streets in proportion to length, so a route with 60% of its street length in one block group is assumed to have 60% of its homes there. Each block group then contributes its Census counts in proportion to the share of its housing units that sit on the route (capped at the whole block group). Medians are recalculated from the combined income, home-value and age brackets, the way the Census Bureau computes them, not averaged.
Margins of error
Census survey figures carry a margin of error at 90% confidence; we carry it through the calculation and show it as ±. Our margins treat the route-to-block-group split as exact, so the real uncertainty is larger. Routes with fewer than 100 estimated households, large margins, or streets we could not place are flagged.
Different years
USPS mailbox counts are current. Census figures are 5-year averages for 2020–2024, so a new subdivision may have more homes on the route today than the Census counted. Use the route figures to compare routes with each other, not as an exact head count.
Why some routes show identical figures
Two routes that run through the same block group get the same percentages and medians, because the Census publishes one set of figures for the whole block group. Their mailbox counts still differ, and those are exact.
Route and mailbox counts: USPS EDDM route data. Route demographics: EDDM2GO estimates from U.S. Census Bureau American Community Survey 5-year block-group data (2020–2024) and 2024 cartographic block-group boundaries. This product uses the Census Bureau Data API but is not endorsed or certified by the Census Bureau.
Nearby ZIP codes
- 50647 — Janesville city, IA (6.3 mi)
- 50660 — New Hartford city, IA (7 mi)
- 50619 — Clarksville city, IA (8.7 mi)
- 50665 — Parkersburg city, IA (10.4 mi)
- 50602 — Allison city, IA (10.6 mi)
- 50677 — Waverly city, IA (10.9 mi)
- 50673 — Stout city, IA (11.6 mi)
- 50613 — Cedar Falls city, IA (12.1 mi)
Areas that include 50670
- Shell Rock, IA ZIP codes — 1 ZIP code
- Butler County ZIP codes — 14 ZIP codes
- Iowa ZIP code data
Where it ranks
- No. 2 of 8: highest median household income in Butler County
- No. 3 of 8: highest median home value in Butler County
- No. 2 of 8: highest share of owner-occupied homes in Butler County
- No. 1 of 8: highest share of households with children in Butler County
- No. 1 of 8: lowest median age in Butler County
- No. 2 of 8: fastest population growth in Butler County
Mail every home in 50670
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) 50670, which approximates the USPS ZIP code area. Census figures: American Community Survey 5-year estimates, 2020–2024.
Frequently asked questions
- What city is 50670 in?
- 50670 is a Shell Rock, IA mailing address. By land area, 3% lies inside Shell Rock; the rest is outside any Census-defined city or community.
- What county is 50670 in?
- 50670 is in Butler County.
- What is the population of 50670?
- About 2,270 people (±332), according to the Census Bureau's American Community Survey 5-year estimates for 2020–2024. The 2020 Census counted 1,959.
- What is the median household income in 50670?
- $84,679 (±$7,591), compared with $75,059 for Iowa as a whole. Half the households in the ZIP code earn more and half earn less.
- How many carrier routes and mailboxes are in 50670?
- 2 USPS carrier routes with 618 residential and 18 business mailboxes (636 in all), from the route data stored by EDDM2GO. An EDDM mailing can target any combination of these routes.
- What ZIP codes are near 50670?
- The closest, measured center to center: 50647 (6.3 mi, Janesville), 50660 (7 mi, New Hartford), 50619 (8.7 mi, Clarksville), 50665 (10.4 mi, Parkersburg), 50602 (10.6 mi, Allison) and 50677 (10.9 mi, Waverly).
This product uses the Census Bureau Data API but is not endorsed or certified by the Census Bureau.