ZIP codes

ZIP codes in Linn County, Iowa

Linn County has 29 ZIP codes. 15 lie entirely inside it and 14 are shared with neighboring counties, so part of their land and their people are elsewhere. About 229,524 people live in the parts inside it (ACS 2020–2024).

By the All Map Tools Team

ZIP codes: 29; 1 more just touches the border (under 1% of their land)
Entirely inside: 15; 99% or more of their land
Shared with other counties: 14; Most with Benton County (6)
Most populated ZIP: 52404; 42,958 people · Cedar Rapids
Least populated ZIP: 52344; 67 people
Largest ZIP by land: 52214; 90 sq mi · Central City

Map of the ZIP codes in Linn County

Entirely in the county (99% or more of its land)
Shared, mostly in this county
Shared, mostly in other counties
Neighboring counties

Open in the interactive tool

Each area is a ZIP code with its number where it fits. Hover over one to see its name.

All ZIP codes in Linn County

29 ZIP codes in Linn County, IA, by number
ZIP code	Main city	Population	Land in the county	Residents in the county
52202	Alburnett	1,269	100%	1,269
52205	Anamosa	8,627	15%	≈ 616
52213	Center Point	4,114	76%	≈ 3,495
52214	Central City	2,761	100%	2,761
52218	Coggon	1,413	56%	≈ 895
52219	Prairieburg	143	100%	143
52227	Ely	2,996	93%	≈ 2,900
52228	Fairfax	3,802	76%	≈ 3,167
52233	Hiawatha	7,000	100%	7,000
52253	Lisbon	2,622	24%	≈ 1,679
52302	Marion	42,706	100%	42,706
52305	Martelle	913	22%	≈ 217
52310	Monticello	6,450	4.2%	≈ 145
52314	Mount Vernon	6,200	100%	6,200
52324	Palo	2,216	82%	≈ 2,101
52328	Robins	2,712	100%	2,712
52332	Shellsburg	1,612	7.8%	≈ 352
52336	Springville	2,397	100%	2,397
52338	Shueyville	3,934	6.1%	≈ 245
52341	Hiawatha	1,378	100%	1,378
52344	—	67	100%	67
52351	Walford	1,329	32%	≈ 563
52352	Walker	1,833	47%	≈ 1,254
52401	Cedar Rapids	2,181	100%	2,181
52402	Cedar Rapids	42,938	100%	42,938
52403	Cedar Rapids	22,551	100%	22,551
52404	Cedar Rapids	42,958	95%	≈ 42,722
52405	Cedar Rapids	26,526	100%	26,526
52411	Cedar Rapids	8,342	100%	8,342

They also touch the county with under 1% of their land, so they aren’t counted: 52203.

ZIP codes shared with other counties

These 14 ZIP codes have part of their land in another county. The first figure is the share of their land in Linn County; then, where the rest lies.

52205 (Anamosa): 15% here; 85% in Jones County.
52213 (Center Point): 76% here; 24% in Benton County.
52218 (Coggon): 56% here; 24% in Buchanan County and 20% in Delaware County.
52227 (Ely): 93% here; 6.6% in Johnson County.
52228 (Fairfax): 76% here; 13% in Benton County and 11% in Johnson County.
52253 (Lisbon): 24% here; 50% in Cedar County, 18% in Jones County, and 8.8% in Johnson County.
52305 (Martelle): 22% here; 78% in Jones County.
52310 (Monticello): 4.2% here; 95% in Jones County.
52324 (Palo): 82% here; 18% in Benton County.
52332 (Shellsburg): 7.8% here; 92% in Benton County.
52338 (Shueyville): 6.1% here; 94% in Johnson County.
52351 (Walford): 32% here; 68% in Benton County.
52352 (Walker): 47% here; 36% in Buchanan County and 17% in Benton County.
52404 (Cedar Rapids): 95% here; 5.0% in Johnson County.

Cities and prefixes

By main city (the city, town or CDP each ZIP shares the most land with), the ones with the most are Cedar Rapids (6), Hiawatha (2), Alburnett (1), Anamosa (1), Center Point (1), and Central City (1); 22 places in all.

They start with 3 different three-digit prefixes, one per USPS sorting center: 522, 523, and 524.

Neighboring counties

Each one with its ZIP codes. Those without a page of their own open in the tool.

Tools for this county

ZIP codes by county or city The same ZIP codes on an interactive map, with the list as CSV or to copy County map with cities Its cities, towns and CDPs with their population ZIP codes in a radius The ZIP codes within 10 miles of its center, or any distance you like

Sources

U.S. Census Bureau, 2020 ZCTA to County, ZCTA to Place and ZCTA to Census Tract Relationship Files (and the 2022 County Subdivision to ZCTA file for Connecticut). Public domain.
U.S. Census Bureau, American Community Survey 2020–2024 5-year estimates, table B01003 (population of each ZIP code, census tract and Connecticut town). Public domain.
U.S. Census Bureau, Vintage 2025 Population Estimates (county population) and 2025 Gazetteer Files (land area and interior point of each ZIP code). Public domain.
U.S. Census Bureau, Cartographic Boundary Files: ZCTAs 2020 and counties 2025, 1:500,000; county adjacency file 2025. Public domain.

How we count. ZIP codes here are the Census Bureau’s ZIP Code Tabulation Areas (ZCTAs), the areas it draws to match USPS ZIP codes; ZIPs with no area of their own (PO boxes, single buildings) aren’t included. A ZIP can cross county lines: “Land in the county” is the exact share of its land inside, from the Census relationship files. “Residents in the county” is the whole ZIP for those entirely inside; for shared ones it’s an estimate, spreading the people of each census tract over the land it shares with the ZIP. Population: ACS 2020–2024. Methodology.

Spotted a mistake? Let us know