ZIP codes

ZIP codes in Delaware County, Ohio

Delaware County has 19 ZIP codes. 7 lie entirely inside it and 12 are shared with neighboring counties, so part of their land and their people are elsewhere. About 223,666 people live in the parts inside it (ACS 2020–2024).

By the All Map Tools Team

ZIP codes: 19; 5 more just touch the border (under 1% of their land)
Entirely inside: 7; 99% or more of their land
Shared with other counties: 12; Most with Licking County (4)
Most populated ZIP: 43015; 61,401 people · Delaware
Least populated ZIP: 43066; 1,368 people · Radnor; 1 more with nobody living there
Largest ZIP by land: 43015; 128 sq mi · Delaware

Map of the ZIP codes in Delaware 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 Delaware County

19 ZIP codes in Delaware County, OH, by number
ZIP code	Main city	Population	Land in the county	Residents in the county
43003	Ashley	3,723	50%	≈ 1,967
43011	Centerburg	6,594	14%	≈ 796
43015	Delaware	61,401	99.4%	≈ 61,113
43017	Dublin	41,613	22%	≈ 4,780
43021	Galena	14,403	100%	14,403
43031	Johnstown	13,876	5.3%	≈ 912
43032	Kilbourne	0	100%	0
43035	Columbus	36,012	100%	36,012
43054	New Albany	27,594	1.5%	≈ 81
43061	Ostrander	4,921	84%	≈ 3,670
43065	Powell	46,679	95%	≈ 38,214
43066	Radnor	1,368	100%	1,368
43074	Sunbury	16,873	98%	≈ 16,735
43082	Westerville	34,563	100%	34,563
43240	Columbus	7,679	100%	7,679
43334	Marengo	6,326	2.5%	≈ 169
43342	Prospect	3,836	4.6%	≈ 172
43344	Richwood	6,173	4.8%	≈ 383
43356	Waldo	1,120	18%	≈ 233

They also touch the county with under 1% of their land, so they aren’t counted: 43013, 43016, 43040, 43081, and 43235.

ZIP codes shared with other counties

These 12 ZIP codes have part of their land in another county. The first figure is the share of their land in Delaware County; then, where the rest lies.

43003 (Ashley): 50% here; 50% in Morrow County.
43011 (Centerburg): 14% here; 52% in Knox County, 19% in Licking County, and 15% in Morrow County.
43017 (Dublin): 22% here; 74% in Franklin County and 4.1% in Union County.
43031 (Johnstown): 5.3% here; 95% in Licking County.
43054 (New Albany): 1.5% here; 79% in Franklin County and 20% in Licking County.
43061 (Ostrander): 84% here; 16% in Union County.
43065 (Powell): 95% here; 4.5% in Franklin County.
43074 (Sunbury): 98% here; 2.1% in Licking County.
43334 (Marengo): 2.5% here; 97% in Morrow County.
43342 (Prospect): 4.6% here; 89% in Marion County and 6.7% in Union County.
43344 (Richwood): 4.8% here; 94% in Union County.
43356 (Waldo): 18% here; 73% in Marion County and 9.8% in Morrow 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 Columbus (2), Ashley (1), Centerburg (1), Delaware (1), Dublin (1), and Galena (1); 18 places in all.

They start with 3 different three-digit prefixes, one per USPS sorting center: 430, 432, and 433.

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.

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