Residential delivery area · Michigan
ZIP Code 48040: Marysville, MI
ZIP code 48040 is in Marysville, Michigan, entirely in St. Clair County (Census 2020 ZIP-county file). About 9,900 people live there (Census Bureau, ACS 2020-2024). Median household income is $66,901 (Census Bureau, ACS 2020-2024).
- ACS2020-24
- Census2020
- FHFA2025
- ZBP2023
- IRS2022
- Town
- Marysville · its only residential ZIP
- County
- St. Clair County
- Census places
- Marysville
- Metro area
- Detroit-Warren-Dearborn, MI
- House district
- MI-9 119th Congress
- State
- Michigan
- Time zone
- Eastern
- Land area
- 6.9 sq mi · 1,436 people per sq mi
Where is ZIP code 48040?
48040 centers on 42.910°, -82.481° and covers 6.9 square miles of land plus 1.0 of water. It borders 3 ZIP codes: 48074, 48079, 48060.
The map draws ZIP code areas only. For the streets inside 48040, 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 48040 compare with the rest of St. Clair County?
| Measure | 48040 | In St. Clair County | In MI |
|---|---|---|---|
| People (ACS 2020-2024) | 9,925 | 5th of 23 | 330th of 992 |
| Median household income | $67k | 17th of 21 | 441st of 774 |
| Median home value | $209k | 18th of 22 | 376th of 779 |
Its median household income is higher than in 42% of U.S. residential ZIP codes, and it is denser than 82% 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 48040?
The 2020 Census counted 9,994 people in 48040; the ACS, which samples households over 2020-2024, estimates 9,925. Between the 2010 and 2020 censuses its population grew 0.4% (its boundary stayed at least 90% the same).
- People, ACS 2020-2024
- 9,925
- 2020 Census count
- 9,994+0.4% since 2010 (9,956)
- Households
- 4,322
- Median age
- 45.4
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 48040?
Of the 9,925 people the ACS estimates in 48040, 22.6% are under 18 and 22.9% are 65 or older. The largest group by race and Hispanic origin is White (not Hispanic) (93.0%).
- Under 1822.6%
- 18 to 6454.6%
- 65 and older22.9%
- White, not Hispanic93.0%
- Other or two or more3.4%
- Hispanic or Latino1.3%
- Asian, not Hispanic1.2%
- Black, not Hispanic1.1%
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 48040 earn?
Median household income is $66,901 (ACS 2020-2024), the 17th highest of the 21 ranked ZIP codes in St. Clair County. It is not measurably different from 2015-2019 ($76,611 in 2024 dollars): the change is within the surveys' margins of error.
- Median household income
- $66,901±$6,899
- Income per person
- $37,451
- Below the poverty line
- 6.4%
- Unemployed (of the labor force)
- 3.4%
- Adults 25+ with a bachelor's degree
- 24.6%
- Adjusted gross income per tax return, 2022
- $64,9405,250 returns; wages 71% 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 48040?
FHFA's house price index for 48040, built from repeat sales and appraisals of the same homes, rose 98% from 2015 to 2025 and rose 50% from 2020 to 2025, and moved +2.1% in 2025.
- Median home value (owners' estimate)
- $208,600
- Median gross rent
- $974
- Homes owned by their occupants
- 83.9%
- Housing units
- 4,528
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 48040?
233 business establishments had a location in this ZIP code in 2023, 9 more than in 2018; the most are in health care and social assistance (ZIP Code Business Patterns).
- Health care and social assistance40
- Accommodation and food services31
- Retail trade29
- Other services (except public administration)26
- Finance and insurance22
- Manufacturing19
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 48040?
| ZIP | Town | People | Household income | Distance |
|---|---|---|---|---|
| 48074 | Smiths Creek | 9,624 | $71k | 4.9 mi |
| 48079 | Saint Clair | 12,711 | $80k | 4.9 mi |
| 48060 | Port Huron | 39,342 | $53k | 5.2 mi |
| 48054 | East China | 7,188 | $83k | 10.0 mi (near) |
| 48049 | North Street | 5,468 | $84k | 10.1 mi (near) |
| 48063 | Columbus | 4,206 | $94k | 10.8 mi (near) |
| 48027 | Goodells | 3,187 | $90k | 11.1 mi (near) |
| 48059 | Fort Gratiot | 15,499 | $80k | 12.3 mi (near) |
Source: PlainZIP from the Census 2020 ZCTA boundaries (shared edges) and internal points; figures ACS 2020-2024.