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County ZIP codes · Michigan · FIPS 26131

Ontonagon County, MI ZIP Codes

Ontonagon County, Michigan has 12 ZIP codes (Census 2020 ZCTA-county file; GeoNames postal codes, October 2026), all residential. 8 of the residential ones lie mainly in Ontonagon County and 4 mainly in a neighboring county; 5 cross the county line.

  • ACS2020-24
  • Census2020

Where are the ZIP codes of Ontonagon County?

49910 · Bergland: $40k49912 · Bruce Crossing: $57k49925 · Ewen: $56k49929 · Greenland: $43k49947 · Marenisco: $49k49948 · Mass City: $73k49952 · Nisula: $80k49953 · Ontonagon: $59k49960 · Rockland: $44k49965 · Toivola: $78k49967 · Trout Creek: $44k49971 · White Pine: $40k49953499474996749912499654992549948499104995249960499714992949910 · Bergland: $40k49912 · Bruce Crossing: $57k49925 · Ewen: $56k49929 · Greenland: $43k49947 · Marenisco: $49k49948 · Mass City: $73k49952 · Nisula: $80k49953 · Ontonagon: $59k49960 · Rockland: $44k49965 · Toivola: $78k49967 · Trout Creek: $44k49971 · White Pine: $40k499534994749967499124996549925499484991049952499604997149910 · Bergland: $40k49912 · Bruce Crossing: $57k49925 · Ewen: $56k49929 · Greenland: $43k49947 · Marenisco: $49k49948 · Mass City: $73k49952 · Nisula: $80k49953 · Ontonagon: $59k49960 · Rockland: $44k49965 · Toivola: $78k49967 · Trout Creek: $44k49971 · White Pine: $40k4995349947499674991249965499254994849910499524996049971
The residential ZIP codes of Ontonagon County (whole outlines, including the parts in neighboring counties), shaded by median household income in national fifths (ACS 2020-2024).<$54.1k$98.1k+no figure

Source: U.S. Census Bureau, 2020 ZCTA cartographic boundaries; ACS 2020-2024 5-year estimates (B19013).

All 12 residential ZIP codes in Ontonagon County

8 ZIP codes lie mainly in Ontonagon County; 4 more reach into it from a neighboring county and follow the first table.

Residential ZIP codes mainly in Ontonagon County, largest first; "In this county" is the share of the ZIP's land in the county
In this county
49953 Ontonagon 2,368 5 $59k $120k 100%
49912 Bruce Crossing 834 4 $57k $115k 100%
49948 Mass City 581 5 $73k $100k 98%
49925 Ewen 566 3 $56k $113k 100%
49971 White Pine 369 16 $40k $60k 100%
49910 Bergland 298 7 $40k $301k 100%
49960 Rockland 291 7 $44k $62k 100%
49929 Greenland 121 6 $43k $63k 100%

Partly in Ontonagon County

Residential ZIP codes mainly in another county that reach at least 1% into Ontonagon County, by their share here
In this county
49967 Trout Creek 383 1 $44k $96k 37%
49947 Marenisco 673 2 $49k $205k 20%
49965 Toivola 544 3 $78k $232k 13%
49952 Nisula 111 1 $80k $104k 2%

Download the 12 ZIP codes as CSV

Source: U.S. Census Bureau, ACS 2020-2024 5-year estimates; county shares by land area (Census 2020 ZCTA-county relationship file).

Which ZIP codes cross the county line?

5 ZIP codes of Ontonagon County extend into another county. A ZIP code follows mail routes, not county borders.

Share of each ZIP code's land in Ontonagon County and in the neighboring counties
ZIPIn OntonagonElsewhere
4994720%Gogebic County80%
4994898%Houghton County2%
4996513%Houghton County87%
4996737%Houghton County44%; Iron County19%
499522%Houghton County98%

Source: U.S. Census Bureau, 2020 ZCTA-county relationship file (shares of land area).

Which first three digits do Ontonagon County's ZIP codes use?

The first three digits of a ZIP code name the sectional center, the mail processing plant that sorts it. Every ZIP code of Ontonagon County starts with 499.

Three-digit prefixes of Ontonagon County's ZIP codes, the sectional center for each (USPS labeling list L005, effective October 1, 2026) and how many of the prefix's codes are Ontonagon County's
PrefixSectional centerHereAll codes
499Iron Mountain, MI (SCF 498)1247

Source: U.S. Postal Service, labeling list L005 (3-digit ZIP Code prefix groups, SCF sortation), effective October 1, 2026.