What city is 51250 in?

51250 is a Sioux Center, IA mailing address. By land area, 8% lies inside Sioux Center; the rest is outside any Census-defined city or community.

What is the population of 51250?

About 9,970 people (±685), according to the Census Bureau's American Community Survey 5-year estimates for 2020–2024. The 2020 Census counted 9,427.

What is the median household income in 51250?

$94,119 (±$14,087), 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 51250?

7 USPS carrier routes with 3,302 residential and 239 business mailboxes (3,542 in all), from the route data stored by EDDM2GO. An EDDM mailing can target any combination of these routes.

What ZIP codes are near 51250?

The closest, measured center to center: 51041 (8 mi, Orange City), 51239 (8.3 mi, Hull), 51036 (8.4 mi, Maurice), 51247 (9.7 mi, Rock Valley), 51027 (10.6 mi, Ireton) and 51234 (11.7 mi, Boyden).

51250 ZIP Code, Sioux Center, IA

51250 is a ZIP code in Sioux Center, Iowa in Sioux County. It covers 73 square miles of land. The closest ZIP codes are 51041, 51239 and 51036. 9,970 people live here in 3,373 households, more than in 9 of every 10 Iowa ZIP codes. With about 136 people per square mile it is lightly settled, and most homes are owner-occupied (78%). Median household income is $94,119, above the Iowa median of $75,059.

Quick facts

Mailing city: Sioux Center, IA
County: Sioux County
Land area: 73 sq mi
Population: 9,970
Median household income: $94,119
Carrier routes: 7 (3,302 homes)

Key figures

Measure	Value
Residents	9,970
Households	3,373
Median household income	$94,119
Income per person	$37,713
Median age	31.6
Homeowners	78.4%
Median home value	$294,000
Median rent	not published
Bachelor's degree or higher	41.3%
Average commute (minutes)	12.1
Households with kids under 18	39.5%
Moved in the past year	9.9%
Below the poverty line	2.9%
Broadband internet	92.8%
Speak a non-English language at home	8.9%

Household income

% of households	Value
<$10K	2.4%
$10–15K	1.3%
$15–25K	2.7%
$25–35K	11.3%
$35–50K	7.2%
$50–75K	13.8%
$75–100K	14.2%
$100–150K	27.7%
$150–200K	7.8%
$200K+	11.5%

Age

% of all residents	Value
<10	12.8%
10–19	20.9%
20–24	9.4%
25–34	12.1%
35–44	9.4%
45–54	11.2%
55–64	9.8%
65–74	6.8%
75+	7.6%

Tenure

% of housing units	Value
Owned, with mortgage	46.4%
Owned outright	30.5%
Rented	21.0%
Vacant	2.1%

Type of building

% of housing units	Value
Detached house	76.7%
Townhome	7.2%
2–4 units	3.3%
5–19 units	10.1%
20+ units	2.6%
Mobile / other	0.3%

Businesses in 51250

411 business establishments with 7,941 employees (ZIP Codes Business Patterns 2023).

Construction: 52
Retail Trade: 47
Health Care and Social Assistance: 38
Professional, Scientific, and Technical Services: 36
Other Services (except Public Administration): 35
Transportation and Warehousing: 31
Wholesale Trade: 27
Finance and Insurance: 25

EDDM carrier routes

51250 has 7 USPS carrier routes with 3,302 residential and 239 business mailboxes. Open the EDDM route map.

Carrier routes in 51250

51250 has 7 USPS carrier routes (3 city (C), 4 rural (R)) with 3,302 residential and 239 business mailboxes. Routes range from 145 homes (R002) to 719 homes (C003); the median route has 454 homes. The Census counted 3,373 households in 51250 (2020–2024 average); USPS counts current mailboxes, including new and vacant homes.

Homes per route	Routes
1–249	1
250–499	3
500–749	3
750–999	0
1,000–1,499	0
1,500+	0

Best routes in 51250 for…

Most businesses

For B2B offers: office supplies, cleaning, IT, catering and commercial services.

Route C003 — USPS business mailboxes 69, 719 homes
Route C002 — USPS business mailboxes 57, 614 homes
Route R001 — USPS business mailboxes 40, 382 homes
Route R003 — USPS business mailboxes 36, 644 homes
Route C001 — USPS business mailboxes 28, 454 homes

Select these 5 routes on the route map

Every carrier route in 51250

Route	Type	Homes	Businesses	Est. median income	Est. owners	Est. families with kids	Est. moved in past year
C001	City	454	28	$99,780	—	—	—
C002	City	614	57	$75,769	—	—	—
C003	City	719	69	$81,052	—	—	—
R001	Rural	382	40	$111,474	—	—	—
R002	Rural	145	5	$99,780	—	—	—
R003	Rural	644	36	$111,474	—	—	—
R004	Rural	344	4	$103,724	—	—	—

Income, owners, families and movers are estimates for each route (how we estimate them); mailbox counts are current USPS figures. Open 51250 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

51041 — Orange City city, IA (8 mi)
51239 — Hull city, IA (8.3 mi)
51036 — Maurice city, IA (8.4 mi)
51247 — Rock Valley city, IA (9.7 mi)
51027 — Ireton city, IA (10.6 mi)
51234 — Boyden city, IA (11.7 mi)
51003 — Alton city, IA (13.1 mi)
51235 — Doon city, IA (14.1 mi)

Areas that include 51250

Where it ranks

Mail every home in 51250

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) 51250, which approximates the USPS ZIP code area. Census figures: American Community Survey 5-year estimates, 2020–2024.

Frequently asked questions

What city is 51250 in?: 51250 is a Sioux Center, IA mailing address. By land area, 8% lies inside Sioux Center; the rest is outside any Census-defined city or community.
What county is 51250 in?: 51250 is in Sioux County.
What is the population of 51250?: About 9,970 people (±685), according to the Census Bureau's American Community Survey 5-year estimates for 2020–2024. The 2020 Census counted 9,427.
What is the median household income in 51250?: $94,119 (±$14,087), 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 51250?: 7 USPS carrier routes with 3,302 residential and 239 business mailboxes (3,542 in all), from the route data stored by EDDM2GO. An EDDM mailing can target any combination of these routes.
What ZIP codes are near 51250?: The closest, measured center to center: 51041 (8 mi, Orange City), 51239 (8.3 mi, Hull), 51036 (8.4 mi, Maurice), 51247 (9.7 mi, Rock Valley), 51027 (10.6 mi, Ireton) and 51234 (11.7 mi, Boyden).

This product uses the Census Bureau Data API but is not endorsed or certified by the Census Bureau.