HomeMichiganSt. Clair CountyMarine City
Marine City, Michigan: commercial real estate data.
Marine City is a Census city of 4,028 people across 2.16 square miles of land, in St. Clair County. Median household income is $67,683, 80.7 percent of occupied homes are owned, and the SBA record carries 16 7(a) approvals to borrowers here worth $5.5 m since FY2020.
Underlined figures are computed by MMCG Analytics, not published by the agency.
Marine City
What Marine City is
- Census place typecity
- Land area2.16 sq mi
- Water area0.74 sq mi
- Population per square mile of land1,868
- County holding the largest share of its areaSt. Clair County, 100.0 percent
US Census Bureau, cartographic boundary file, places, 2024 vintage. US Census Bureau, American Community Survey 5-Year Estimates, place level, 2020-2024 5-year.
Marine City
How many people live in Marine City
- Population4,028
- Median age51.1
- Population under 18575 plus or minus 140
- Share under 1814.3 percent plus or minus 3.5
- Population 65 and over1,173 plus or minus 265
- Share 65 and over29.1 percent plus or minus 6.6
- Households2,024
- Family households1,102
- Share of households that are families54.4 percent
US Census Bureau, American Community Survey 5-Year Estimates, place level, 2020-2024 5-year.
Marine City
Income and work in Marine City
- Median household income$67,683 plus or minus $14,357
- Per capita income$43,130
- Civilian labor force2,066
- Employed1,875
- Unemployed191 plus or minus 134
- Unemployment rate9.2 percent plus or minus 6.4
- Adults 25 and over3,117
- Adults 25 and over with a high school diploma or higher88.4 percent
- Adults 25 and over with a bachelor degree or higher18.4 percent plus or minus 5.0
- Adults 25 and over with a graduate degree9.0 percent plus or minus 4.0
US Census Bureau, American Community Survey 5-Year Estimates, place level, 2020-2024 5-year.
Marine City
Housing in Marine City
- Housing units2,262
- Occupied units2,024
- Vacant units238 plus or minus 124
- Vacancy rate10.5 percent plus or minus 5.4
- Owner occupied1,634
- Renter occupied390 plus or minus 116
- Ownership rate80.7 percent
- Median owner-occupied home value$159,800
- Median gross rent, monthly$944
- Annual rent as a share of median income16.7 percent plus or minus 4.1
- Single family units1,810
- Share single family80.0 percent
- Units in buildings of two or more452 plus or minus 186
- Share in buildings of two or more20.0 percent plus or minus 8.1
- Mobile homes0
- Median year structure built1946
US Census Bureau, American Community Survey 5-Year Estimates, place level, 2020-2024 5-year.
Marine City
How Marine City gets to work
- Workers 16 and over who commute1,799
- Commuting under 15 minutes427 plus or minus 128
- Share commuting under 15 minutes23.7 percent plus or minus 6.7
- Commuting 30 minutes or more854 plus or minus 190
- Share commuting 30 minutes or more47.5 percent
- Drove alone87.7 percent
- Carpooled4.6 percent plus or minus 2.8
- Public transport0.0 percent
- Walked3.1 percent plus or minus 2.7
- Worked from home4.6 percent plus or minus 2.8
US Census Bureau, American Community Survey 5-Year Estimates, place level, 2020-2024 5-year.
Marine City
SBA loans in Marine City (7(a))
- Approvals16
- Gross approval$5,482,400
- Average approval$342,650
- Median approval$93,200
- Largest approval$1,735,000
- Jobs supported81
- Jobs per approval5.1
- Loans with a final outcome4
- Paid in full4
- Charged off0
- Median term120 months
- Share on real estate terms of 20 years or more6.3 percent
- Share to franchises0.0 percent
- Distinct lenders4
- Distinct industries by NAICS12
Counted by borrower city: approvals to borrowers whose address is in Marine City, in any county, FY2020 to FY2026. Only 4 loans have reached a final outcome, fewer than the 30 a charge-off rate needs, so no rate is published.
US Small Business Administration, 7(a) FOIA release, FY2020 to FY2026 year to date, as of 2026-06-30.
Marine City
SBA loans in Marine City (504)
- Approvals5
- Gross approval$5,296,000
- Average approval$1,059,200
- Median approval$186,000
- Largest approval$3,362,000
- Jobs supported37
- Loans with a final outcome1
- Charged off0
- Median term240 months
- Distinct CDCs1
Counted by borrower city: approvals to borrowers whose address is in Marine City, in any county, FY2010 to FY2026. Only 1 loan has reached a final outcome, fewer than the 30 a charge-off rate needs, so no rate is published.
US Small Business Administration, 504 FOIA release, FY2010 to FY2026 year to date, as of 2026-06-30.
Marine City
Flood risk in Marine City
- NFIP communityCity of Marine City
- NFIP community number260200
- Participating in the NFIPYes
- Community Rating System classNone
- Currently effective map date05/03/10
The City of Marine City participates in the National Flood Insurance Program as community 260200 and carries no Community Rating System class, so no CRS premium discount applies to it.
Federal Emergency Management Agency, NFIP Community Status Book (OpenFEMA), as of 2026-09-26.
St. Clair County, not Marine City
St. Clair County context, not Marine City figures
- Establishments in St. Clair County3,080
- Covered employment, St. Clair County42,283
- Average annual pay, St. Clair County$55,695
- Housing units permitted, St. Clair County235
Every figure in this section is published for St. Clair County as a whole and is not a measurement of Marine City.
All St. Clair County figures →
US Census Bureau, County Business Patterns, 2023. US Bureau of Labor Statistics, Quarterly Census of Employment and Wages, 2024 annual averages. US Census Bureau, Building Permits Survey, 2024 annual.
Coverage
What this page does not hold.
Parcel detail, zoning and the flood zone at an address are not on this page; they resolve at the address in the platform. How this page was built →
Common questions
Marine City questions, answered from the record.
How many people live in Marine City, Michigan?
4,028, in 2,024 households. Marine City city covers 2.16 square miles of land, which is 1,868 people per square mile. Source: US Census Bureau, American Community Survey 5-Year Estimates, place level, 2020-2024 5-year.
What county is Marine City in?
St. Clair County, which holds 100.0 percent of the place by area. Source: US Census Bureau, cartographic boundary file, places, 2024 vintage.
What is the median household income in Marine City?
$67,683. The median owner-occupied home is valued at $159,800. Median gross rent is $944 per month. Source: US Census Bureau, American Community Survey 5-Year Estimates, place level, 2020-2024 5-year.
How much SBA lending goes to Marine City businesses?
16 7(a) approvals totaling $5.5 m since FY2020, across 4 lenders, median approval $93,200, plus 5 504 approvals worth $5.3 m since FY2010. These count approvals to borrowers whose address is in Marine City, not projects sited inside the place boundary, and they are approvals recorded in the release rather than loans disbursed.
Do SBA loans to Marine City borrowers get paid back?
No rate is published for Marine City. Only 4 loans have reached a final outcome, fewer than the 30 a charge-off rate needs, so no rate is published. The counts are shown instead.
Is Marine City in the National Flood Insurance Program?
Yes. Marine City appears in the FEMA Community Status Book as Marine City, city of, community 260200, with no Community Rating System class, so no CRS discount applies. Whether a specific parcel sits in a mapped special flood hazard area is an address level question the platform answers.
Are the county figures on this page Marine City figures?
No, and they are labeled so. County Business Patterns, QCEW, the Building Permits Survey, BEA product and IRS migration are published for St. Clair County as a whole and there is no place level equivalent. They appear in one clearly marked section as context and are never presented as measurements of Marine City.
Is zoning published for Marine City?
No. Nothing on this page presents parcel level zoning.
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