Residential delivery area · Minnesota

ZIP Code 55781: Side Lake, MN

ZIP code 55781 uses the postal name Side Lake, Minnesota and lies mostly in Itasca County (56% of its land) with the rest in St. Louis County (Census 2020 ZIP-county file). About 820 people live there (Census Bureau, ACS 2020-2024). Median household income is $101,406 (Census Bureau, ACS 2020-2024). Its land lies outside any incorporated or census-designated place.

ACS2020-24
Census2020
FHFA2022
ZBP2023
IRS2022

5national area: Minnesota, Iowa, Montana, North Dakota, South Dakota and Wisconsin

557sectional center: Duluth, MN (SCF 556)

81delivery area within it

Town: Side Lake · its only residential ZIP
County: Itasca County (56%); St. Louis County (44%)
Micro area: Grand Rapids, MN
House district: MN-8 119th Congress
State: Minnesota
Time zone: Central
Land area: 81.4 sq mi · 10 people per sq mi

Where is ZIP code 55781?

55781 centers on 47.681°, -93.065° and covers 81.4 square miles of land plus 5.3 of water. It borders 5 ZIP codes: 55719, 55723, 55769, 55703, 55746.

Shaded by median household income, in national fifths (ACS 2020-2024); 55781 outlined. Census 2020 ZCTA boundaries. <$54.1k$98.1k+no figure

The map draws ZIP code areas only. For the streets inside 55781, open its center on OpenStreetMap.

Source: U.S. Census Bureau, 2020 ZCTA cartographic boundaries and the 2023 Gazetteer (2020 ZCTAs); ZIP-to-county shares, Census places and House districts (119th Congress) from the Census 2020 relationship files (shares of land); metro area from the OMB delineation (July 2023); town name and time zone from simplemaps US ZIP Codes (CC BY 4.0).

How does 55781 compare with the rest of Itasca County?

Rank of 55781 among the residential ZIP codes of its town, county and state (1 = the most; income and home value among ZIP codes of 1,000+ people living in households)
Measure	55781	In Itasca County	In MN
People (ACS 2020-2024)	821	16th of 30	605th of 881
Median household income	$101k	not ranked	not ranked
Median home value	$393k	not ranked	not ranked

55781's income and home value are not ranked: it has fewer than 1,000 residents (821). Rankings use ZIP codes of 1,000 or more people living in households, with margins at most 25% of the figure.

It is denser than 17% of U.S. residential ZIP codes. ZIP codes at the ACS caps ($250,000 or more for household income, $2,000,000 or more for home value) share the top rank.

Source: U.S. Census Bureau, ACS 2020-2024 5-year estimates (B01003, B19013, B25077); ranks by PlainZIP over residential ZIP codes (ZCTAs).

How many people live in 55781?

The 2020 Census counted 728 people in 55781; the ACS, which samples households over 2020-2024, estimates 821. Its boundary changed between the 2010 and 2020 censuses, so the two counts are not compared.

People, ACS 2020-2024: 821±235 (90% margin)
2020 Census count: 728
Households: 331
Median age: 60.2

Source: U.S. Census Bureau, ACS 2020-2024 5-year estimates (B01003, B01002, B11001); 2020 Census (DHC P1); 2010 Census (SF1 P1).

Who lives in 55781?

Of the 821 people the ACS estimates in 55781, 14.3% are under 18 and 42.3% are 65 or older. The largest group by race and Hispanic origin is White (not Hispanic) (94.4%).

Under 1814.3%
18 to 6443.5%
65 and older42.3%

Age of the people of 55781 (ACS 2020-2024, B01001)

White, not Hispanic94.4%
Other or two or more3.3%
Hispanic or Latino2.1%
Black, not Hispanic0.1%
Asian, not Hispanic0.1%

Race and Hispanic origin in 55781 (ACS 2020-2024, B03002); each person counted once

Source: U.S. Census Bureau, ACS 2020-2024 5-year estimates (B01001 age by sex, B03002 Hispanic or Latino origin by race); shares of the estimated population, small ZIP codes carry wide margins.

What do households in 55781 earn?

Median household income is $101,406 (ACS 2020-2024).

Median household income: $101,406±$10,526
Income per person: $48,046
Below the poverty line: 2.3%
Unemployed (of the labor force): 7.5%
Adults 25+ with a bachelor's degree: 37.0%
Adjusted gross income per tax return, 2022: $90,273410 returns; wages 46% of AGI (IRS)

Source: U.S. Census Bureau, ACS 2020-2024 and 2015-2019 5-year estimates (B19013, B19301, B17001, B23025, B15003; 2015-2019 dollars converted with the BLS CPI-U, 1.22699); IRS Statistics of Income, ZIP code data, tax year 2022 (adjusted gross income per return, filed under the address on the return).

What are homes worth in 55781?

Median home value (owners' estimate): $392,900
Median gross rent: $1,313
Homes owned by their occupants: 95.2%
Housing units: 850

Index = 100 in 2001, the first year FHFA reports for 55781; 2022: 181.4. Annual, not seasonally adjusted; FHFA calls its ZIP-level indexes developmental. FHFA's series for 55781 stops in 2022: it publishes no ZIP index for a year with too few repeat sales.

Source: U.S. Census Bureau, ACS 2020-2024 5-year estimates (B25077, B25064, B25003, B25001); FHFA House Price Index, annual five-digit ZIP, updated 2026-03-31.

What businesses are in 55781?

7 business establishments had a location in this ZIP code in 2023, 3 fewer than in 2018; the most are in accommodation and food services (ZIP Code Business Patterns).

Accommodation and food services4

Source: U.S. Census Bureau, ZIP Code Business Patterns 2023 and 2018 (establishments with paid employees, by the business's ZIP code).

Which ZIP codes are next to 55781?

ZIP codes that share a boundary with 55781, then the nearest by center
ZIP	Town	People	Household income	Distance
55719	Chisholm	5,613	$54k	13.5 mi
55723	Cook	1,927	$65k	14.7 mi
55769	Nashwauk	2,219	$66k	14.9 mi
55703	Angora	906	$72k	15.0 mi
55746	Hibbing	16,730	$56k	24.4 mi
55710	Britt	1,362	$87k	17.2 mi (near)
55713	Buhl	1,048	$59k	19.3 mi (near)
55753	Keewatin	1,215	$54k	19.6 mi (near)
55758	Kinney	121	$57k	20.1 mi (near)

Source: PlainZIP from the Census 2020 ZCTA boundaries (shared edges) and internal points; figures ACS 2020-2024.