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ZIP codes

ZIP codes in Monroe County, Michigan

Monroe County has 23 ZIP codes. 15 lie entirely inside it and 8 are shared with neighboring counties, so part of their land and their people are elsewhere. About 154,972 people live in the parts inside it (ACS 2020–2024).

By the All Map Tools Team

ZIP codes
23
2 more just touch the border (under 1% of their land)
Entirely inside
15
99% or more of their land
Shared with other counties
8
Most with Lenawee County (4)
Most populated ZIP
48162
28,156 people · Monroe
Least populated ZIP
48177
533 people
Largest ZIP by land
48160
78 sq mi · Milan

Map of the ZIP codes in Monroe County

Lenawee County Washtenaw County Wayne County Lucas County, OH 48111 · Belleville · 44,709 people · 0.6% in the county 48117 · Carleton · 10,262 people · 99.3% in the county 48131 · Dundee · 8,637 people · 100% in the county 48133 · Luna Pier · 7,085 people · 100% in the county 48134 · Flat Rock · 23,935 people · 15% in the county 48140 · Ida · 3,664 people · 100% in the county 48144 · Lambertville · 10,507 people · 100% in the county 48145 · 2,904 people · 100% in the county 48157 · Luna Pier · 1,244 people · 100% in the county 48159 · Maybee · 2,578 people · 100% in the county 48160 · Milan · 13,972 people · 52% in the county 48161 · Monroe · 26,304 people · 100% in the county 48162 · Monroe · 28,156 people · 100% in the county 48164 · 9,576 people · 3.7% in the county 48166 · Stony Point · 14,056 people · 100% in the county 48177 · 533 people · 100% in the county 48179 · South Rockwood · 3,209 people · 100% in the county 48182 · Temperance · 20,179 people · 100% in the county 48191 · 4,403 people · 12% in the county 49228 · Blissfield · 5,467 people · 0.5% in the county 49229 · Britton · 3,540 people · 11% in the county 49238 · Deerfield · 1,914 people · 30% in the county 49267 · 3,974 people · 79% in the county 49270 · Petersburg · 5,567 people · 100% in the county 49276 · 703 people · 31% in the 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 Monroe County

23 ZIP codes in Monroe County, MI, by number
ZIP code Main city Population Land in the county Residents in the county
48117 Carleton 10,262 99.3% ≈ 10,155
48131 Dundee 8,637 100% 8,637
48133 Luna Pier 7,085 100% 7,085
48134 Flat Rock 23,935 15% ≈ 592
48140 Ida 3,664 100% 3,664
48144 Lambertville 10,507 100% 10,507
48145 — 2,904 100% 2,904
48157 Luna Pier 1,244 100% 1,244
48159 Maybee 2,578 100% 2,578
48160 Milan 13,972 52% ≈ 3,699
48161 Monroe 26,304 100% 26,304
48162 Monroe 28,156 100% 28,156
48164 — 9,576 3.7% ≈ 252
48166 Stony Point 14,056 100% 14,056
48177 — 533 100% 533
48179 South Rockwood 3,209 100% 3,209
48182 Temperance 20,179 100% 20,179
48191 — 4,403 12% ≈ 253
49229 Britton 3,540 11% ≈ 473
49238 Deerfield 1,914 30% ≈ 871
49267 — 3,974 79% ≈ 3,598
49270 Petersburg 5,567 100% 5,567
49276 — 703 31% ≈ 370

They also touch the county with under 1% of their land, so they aren’t counted: 48111 and 49228.

ZIP codes shared with other counties

These 8 ZIP codes have part of their land in another county. The first figure is the share of their land in Monroe County; then, where the rest lies.

Cities and prefixes

By main city (the city, town or CDP each ZIP shares the most land with), the ones with the most are Luna Pier (2), Monroe (2), Britton (1), Carleton (1), Deerfield (1), and Dundee (1); 15 places in all.

They start with 2 different three-digit prefixes, one per USPS sorting center: 481 and 492.

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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