What city is 51360 in?

51360 is a Spirit Lake, IA mailing address. By land area, 4% lies inside Spirit Lake and 1% lies inside Orleans; the rest is outside any Census-defined city or community.

What is the population of 51360?

About 8,653 people (±328), according to the Census Bureau's American Community Survey 5-year estimates for 2020–2024. The 2020 Census counted 8,553.

What is the median household income in 51360?

$75,882 (±$6,636), 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 51360?

10 USPS carrier routes with 4,978 residential and 368 business mailboxes (5,346 in all), from the route data stored by EDDM2GO. An EDDM mailing can target any combination of these routes.

What ZIP codes are near 51360?

The closest, measured center to center: 51355 (4.1 mi, Okoboji), 51331 (5.6 mi, Arnolds Park), 51363 (7 mi, Superior), 51351 (9.6 mi, Milford), 51364 (11.2 mi, Terril) and 51347 (11.7 mi, Lake Park).

51360 ZIP Code, Spirit Lake, IA

51360 is a ZIP code in Spirit Lake, Iowa in Dickinson County. It covers 105 square miles of land. The closest ZIP codes are 51355, 51331 and 51363. 8,653 people live here in 4,330 households. It is rural, with fewer than 100 people per square mile, and most homes are owner-occupied (75%). Median household income is $75,882, close to the Iowa median of $75,059; the median age is 47.3, older than most ZIP codes.

Quick facts

Mailing city: Spirit Lake, IA
County: Dickinson County
Land area: 105 sq mi
Population: 8,653
Median household income: $75,882
Carrier routes: 10 (4,978 homes)

Key figures

Measure	Value
Residents	8,653
Households	4,330
Median household income	$75,882
Income per person	$45,689
Median age	47.3
Homeowners	75.3%
Median home value	$271,700
Median rent	$935
Bachelor's degree or higher	32.8%
Average commute (minutes)	15.2
Households with kids under 18	21.8%
Moved in the past year	13.4%
Below the poverty line	8.2%
Broadband internet	89.4%
Speak a non-English language at home	1.9%

Household income

% of households	Value
<$10K	1.6%
$10–15K	3.6%
$15–25K	13.3%
$25–35K	2.8%
$35–50K	7.8%
$50–75K	19.5%
$75–100K	16.1%
$100–150K	19.4%
$150–200K	7.9%
$200K+	8.0%

Age

% of all residents	Value
<10	8.9%
10–19	9.1%
20–24	7.6%
25–34	11.8%
35–44	10.6%
45–54	9.4%
55–64	15.4%
65–74	14.4%
75+	12.6%

Tenure

% of housing units	Value
Owned, with mortgage	26.9%
Owned outright	21.6%
Rented	15.8%
Vacant	35.6%

Type of building

% of housing units	Value
Detached house	75.0%
Townhome	3.1%
2–4 units	4.7%
5–19 units	6.3%
20+ units	1.7%
Mobile / other	9.2%

Businesses in 51360

399 business establishments with 4,949 employees (ZIP Codes Business Patterns 2023).

Construction: 59
Retail Trade: 58
Accommodation and Food Services: 44
Health Care and Social Assistance: 40
Other Services (except Public Administration): 33
Professional, Scientific, and Technical Services: 31
Administrative and Support and Waste Management and Remediation Services: 31
Finance and Insurance: 21

EDDM carrier routes

51360 has 10 USPS carrier routes with 4,978 residential and 368 business mailboxes. Open the EDDM route map.

Carrier routes in 51360

51360 has 10 USPS carrier routes (3 city (C), 7 rural (R)) with 4,978 residential and 368 business mailboxes. Routes range from 139 homes (C003) to 888 homes (R010); the median route has 509 homes. The Census counted 4,330 households in 51360 (2020–2024 average); USPS counts current mailboxes, including new and vacant homes.

Homes per route	Routes
1–249	2
250–499	2
500–749	5
750–999	1
1,000–1,499	0
1,500+	0

Best routes in 51360 for…

Most businesses

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

Route C003 — USPS business mailboxes 121, 139 homes
Route R005 — USPS business mailboxes 114, 183 homes
Route R012 — USPS business mailboxes 33, 395 homes
Route R009 — USPS business mailboxes 27, 552 homes
Route R010 — USPS business mailboxes 23, 888 homes

Select these 5 routes on the route map

Every carrier route in 51360

Route	Type	Homes	Businesses	Est. median income	Est. owners	Est. families with kids	Est. moved in past year
C001	City	508	8	$77,095	—	—	—
C002	City	498	21	$51,490	—	—	—
C003	City	139	121	$51,490	—	—	—
R005	Rural	183	114	$100,773	—	—	—
R006	Rural	689	4	$77,095	—	—	—
R007	Rural	617	11	$82,617	—	—	—
R008	Rural	509	6	$86,583	—	—	—
R009	Rural	552	27	$123,923	—	—	—
R010	Rural	888	23	$56,361	—	—	—
R012	Rural	395	33	$72,871	—	—	—

Income, owners, families and movers are estimates for each route (how we estimate them); mailbox counts are current USPS figures. Open 51360 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

51355 — Okoboji city, IA (4.1 mi)
51331 — Arnolds Park city, IA (5.6 mi)
51363 — Superior city, IA (7 mi)
51351 — Milford city, IA (9.6 mi)
51364 — Terril city, IA (11.2 mi)
51347 — Lake Park city, IA (11.7 mi)
51340 — Fostoria city, IA (13.8 mi)
56143 — Jackson city, MN (14 mi)

Areas that include 51360

Spirit Lake, IA ZIP codes — 1 ZIP code
Orleans, IA ZIP codes — 1 ZIP code
Wahpeton, IA ZIP codes — 2 ZIP codes
Dickinson County ZIP codes — 9 ZIP codes
Iowa ZIP code data

Where it ranks

Mail every home in 51360

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) 51360, which approximates the USPS ZIP code area. Census figures: American Community Survey 5-year estimates, 2020–2024.

Frequently asked questions

What city is 51360 in?: 51360 is a Spirit Lake, IA mailing address. By land area, 4% lies inside Spirit Lake and 1% lies inside Orleans; the rest is outside any Census-defined city or community.
What county is 51360 in?: 51360 is in Dickinson County.
What is the population of 51360?: About 8,653 people (±328), according to the Census Bureau's American Community Survey 5-year estimates for 2020–2024. The 2020 Census counted 8,553.
What is the median household income in 51360?: $75,882 (±$6,636), 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 51360?: 10 USPS carrier routes with 4,978 residential and 368 business mailboxes (5,346 in all), from the route data stored by EDDM2GO. An EDDM mailing can target any combination of these routes.
What ZIP codes are near 51360?: The closest, measured center to center: 51355 (4.1 mi, Okoboji), 51331 (5.6 mi, Arnolds Park), 51363 (7 mi, Superior), 51351 (9.6 mi, Milford), 51364 (11.2 mi, Terril) and 51347 (11.7 mi, Lake Park).

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