Residential delivery area · Michigan
ZIP Code 48028: Harsens Island, MI
ZIP code 48028 uses the postal name Harsens Island, Michigan and lies entirely in St. Clair County (Census 2020 ZIP-county file). About 1,300 people live there (Census Bureau, ACS 2020-2024). Median household income is $109,730 (Census Bureau, ACS 2020-2024). Its land lies outside any incorporated or census-designated place.
- ACS2020-24
- Census2020
- FHFA2025
- ZBP2023
- IRS2022
- Town
- Harsens Island · its only residential ZIP
- County
- St. Clair County
- Metro area
- Detroit-Warren-Dearborn, MI
- House district
- MI-9 119th Congress
- State
- Michigan
- Time zone
- Eastern
- Land area
- 17.8 sq mi · 72 people per sq mi
Where is ZIP code 48028?
48028 centers on 42.580°, -82.617° and covers 17.8 square miles of land plus 14.6 of water. It borders 1 ZIP code: 48001.
The map draws ZIP code areas only. For the streets inside 48028, 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 48028 compare with the rest of St. Clair County?
| Measure | 48028 | In St. Clair County | In MI |
|---|---|---|---|
| People (ACS 2020-2024) | 1,272 | 23rd of 23 | 778th of 992 |
| Median household income | $110k | 1st of 21 | 56th of 774 |
| Median home value | $391k | not ranked | not ranked |
48028's median home value is not ranked: its 90% margin of error (±$100,159) is more than a quarter of the figure ($390,800). Rankings use ZIP codes of 1,000 or more people living in households, with margins at most 25% of the figure.
Its median household income is higher than in 86% of U.S. residential ZIP codes, and it is denser than 48% 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 48028?
The 2020 Census counted 921 people in 48028; the ACS, which samples households over 2020-2024, estimates 1,272. Between the 2010 and 2020 censuses its population fell 22.6% (its boundary stayed at least 90% the same).
- People, ACS 2020-2024
- 1,272±249 (90% margin)
- 2020 Census count
- 921−22.6% since 2010 (1,190)
- Households
- 684
- Median age
- 65.6
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 48028?
Of the 1,272 people the ACS estimates in 48028, 2.7% are under 18 and 50.9% are 65 or older. The largest group by race and Hispanic origin is White (not Hispanic) (98.6%).
- Under 182.7%
- 18 to 6446.5%
- 65 and older50.9%
- White, not Hispanic98.6%
- Other or two or more1.4%
- Hispanic or Latino0.0%
- Black, not Hispanic0.0%
- Asian, not Hispanic0.0%
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 48028 earn?
Median household income is $109,730 (ACS 2020-2024), the highest of the 21 ranked ZIP codes in St. Clair County. It rose from $65,644 in 2015-2019 (in 2024 dollars), a change larger than the surveys' margins of error.
- Median household income
- $109,730±$14,446
- Income per person
- $76,531
- Below the poverty line
- 4.9%
- Unemployed (of the labor force)
- 2.0%
- Adults 25+ with a bachelor's degree
- 29.0%
- Adjusted gross income per tax return, 2022
- $100,989550 returns; wages 40% 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 48028?
FHFA's house price index for 48028, built from repeat sales and appraisals of the same homes, rose 69% from 2015 to 2025 and rose 37% from 2020 to 2025.
- Median home value (owners' estimate)
- $390,800
- Median gross rent
- –
- Homes owned by their occupants
- 98.2%
- Housing units
- 1,589
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 48028?
21 business establishments had a location in this ZIP code in 2023, the same count as in 2018; the most are in arts, entertainment, and recreation (ZIP Code Business Patterns).
- Arts, entertainment, and recreation6
- Construction4
- Retail trade4
- Accommodation and food services3
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 48028?
| ZIP | Town | People | Household income | Distance |
|---|---|---|---|---|
| 48001 | Algonac | 11,224 | $69k | 4.4 mi |
| 48039 | Marine City | 7,437 | $83k | 8.6 mi (near) |
| 48023 | Fair Haven | 5,031 | $71k | 8.8 mi (near) |
| 48045 | Harrison Township | 24,061 | $80k | 10.2 mi (near) |
| 48047 | New Baltimore | 40,302 | $95k | 10.3 mi (near) |
| 48064 | Casco | 4,180 | $88k | 13.0 mi (near) |
| 48051 | New Baltimore | 17,922 | $91k | 13.1 mi (near) |
| 48043 | Mount Clemens | 15,429 | $52k | 13.5 mi (near) |
Source: PlainZIP from the Census 2020 ZCTA boundaries (shared edges) and internal points; figures ACS 2020-2024.