Residential delivery area · Michigan
ZIP Code 48059: Fort Gratiot, MI
ZIP code 48059 uses the postal name Fort Gratiot, Michigan and lies entirely in St. Clair County (Census 2020 ZIP-county file). About 15,000 people live there (Census Bureau, ACS 2020-2024). Median household income is $80,062 (Census Bureau, ACS 2020-2024). By Census place, 3% of its land lies in Lakeport (a census-designated place), and under 1% in smaller places; 96% is outside any Census place.
- ACS2020-24
- Census2020
- FHFA2025
- ZBP2023
- IRS2022
- Town
- Fort Gratiot · its only residential ZIP
- County
- St. Clair County
- Census places
- Lakeport census-designated place
- Metro area
- Detroit-Warren-Dearborn, MI
- House district
- MI-9 119th Congress
- State
- Michigan
- Time zone
- Eastern
- Land area
- 31.7 sq mi · 489 people per sq mi
Where is ZIP code 48059?
48059 centers on 43.089°, -82.488° and covers 31.7 square miles of land plus 7.2 of water. It borders 4 ZIP codes: 48049, 48032, 48060, 48450.
The map draws ZIP code areas only. For the streets inside 48059, 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 48059 compare with the rest of St. Clair County?
| Measure | 48059 | In St. Clair County | In MI |
|---|---|---|---|
| People (ACS 2020-2024) | 15,499 | 2nd of 23 | 250th of 992 |
| Median household income | $80k | 11th of 21 | 256th of 774 |
| Median home value | $222k | 16th of 22 | 334th of 779 |
Its median household income is higher than in 62% of U.S. residential ZIP codes, and it is denser than 72% of all 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 48059?
The 2020 Census counted 15,319 people in 48059; the ACS, which samples households over 2020-2024, estimates 15,499. Between the 2010 and 2020 censuses its population grew 1.3% (its boundary stayed at least 90% the same).
- People, ACS 2020-2024
- 15,499
- 2020 Census count
- 15,319+1.3% since 2010 (15,123)
- Households
- 6,654
- Median age
- 48.6
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 48059?
Of the 15,499 people the ACS estimates in 48059, 19.2% are under 18 and 26.1% are 65 or older. The largest group by race and Hispanic origin is White (not Hispanic) (89.4%).
- Under 1819.2%
- 18 to 6454.7%
- 65 and older26.1%
- White, not Hispanic89.4%
- Hispanic or Latino6.0%
- Other or two or more2.8%
- Black, not Hispanic1.1%
- Asian, not Hispanic0.6%
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 48059 earn?
Median household income is $80,062 (ACS 2020-2024), the 11th highest of the 21 ranked ZIP codes in St. Clair County. It rose from $68,919 in 2015-2019 (in 2024 dollars), a change larger than the surveys' margins of error.
- Median household income
- $80,062
- Income per person
- $39,425
- Below the poverty line
- 6.7%
- Unemployed (of the labor force)
- 4.3%
- Adults 25+ with a bachelor's degree
- 28.9%
- Adjusted gross income per tax return, 2022
- $74,1627,740 returns; wages 62% 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 48059?
FHFA's house price index for 48059, built from repeat sales and appraisals of the same homes, rose 95% from 2015 to 2025 and rose 50% from 2020 to 2025, and moved −0.7% in 2025.
- Median home value (owners' estimate)
- $221,700
- Median gross rent
- $994
- Homes owned by their occupants
- 83.1%
- Housing units
- 7,422
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 48059?
361 business establishments had a location in this ZIP code in 2023, 8 fewer than in 2018; the most are in retail trade (ZIP Code Business Patterns).
- Retail trade95
- Health care and social assistance57
- Accommodation and food services46
- Construction28
- Other services (except public administration)22
- Professional, scientific, and technical services21
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 48059?
| ZIP | Town | People | Household income | Distance |
|---|---|---|---|---|
| 48049 | North Street | 5,468 | $84k | 5.3 mi |
| 48032 | Jeddo | 1,871 | $97k | 6.3 mi |
| 48060 | Port Huron | 39,342 | $53k | 7.4 mi |
| 48450 | Lexington | 4,320 | $53k | 11.6 mi |
| 48006 | Avoca | 3,889 | $71k | 10.2 mi (near) |
| 48074 | Smiths Creek | 9,624 | $71k | 10.3 mi (near) |
| 48040 | Marysville | 9,925 | $67k | 12.3 mi (near) |
| 48027 | Goodells | 3,187 | $90k | 14.4 mi (near) |
Source: PlainZIP from the Census 2020 ZCTA boundaries (shared edges) and internal points; figures ACS 2020-2024.