HomeWisconsinMarathon CountyColby
Colby, Wisconsin: commercial real estate data.
Colby is a Census city of 1,907 people across 1.64 square miles of land, lying across Marathon County and Clark County. Median household income is $50,114, 53.4 percent of occupied homes are owned, and the SBA record carries 3 7(a) approvals to borrowers here worth $482,500 since FY2020.
Underlined figures are computed by MMCG Analytics, not published by the agency.
Colby
What Colby is
- Census place typecity
- Land area1.64 sq mi
- Water area0.01 sq mi
- Population per square mile of land1,165
- County holding the largest share of its areaMarathon County, 53.1 percent
- Counties this place lies inMarathon County 53.1 percent, Clark County 46.9 percent
Colby crosses a county line. The split above is measured from the Census boundary of the place against the county boundaries, by area, so it says where the ground is and not where the town hall is.
US Census Bureau, cartographic boundary file, places, 2024 vintage. US Census Bureau, American Community Survey 5-Year Estimates, place level, 2020-2024 5-year.
Colby
How many people live in Colby
- Population1,907
- Median age38.3
- Population under 18569 plus or minus 134
- Share under 1829.8 percent
- Population 65 and over425 plus or minus 99
- Share 65 and over22.3 percent
- Households689
- Family households442
- Share of households that are families64.2 percent
US Census Bureau, American Community Survey 5-Year Estimates, place level, 2020-2024 5-year.
Colby
Income and work in Colby
- Median household income$50,114 plus or minus $13,210
- Per capita income$24,388
- Civilian labor force774
- Employed763
- Unemployed11 plus or minus 10
- Unemployment rate1.4 percent plus or minus 1.3
- Adults 25 and over1,216
- Adults 25 and over with a high school diploma or higher86.5 percent
- Adults 25 and over with a bachelor degree or higher16.1 percent plus or minus 5.2
- Adults 25 and over with a graduate degree3.8 percent plus or minus 2.5
US Census Bureau, American Community Survey 5-Year Estimates, place level, 2020-2024 5-year.
Colby
Housing in Colby
- Housing units713
- Occupied units689
- Vacant units24 plus or minus 27
- Vacancy rate3.4 percent plus or minus 3.8
- Owner occupied368
- Renter occupied321 plus or minus 70
- Ownership rate53.4 percent
- Median owner-occupied home value$184,700
- Median gross rent, monthly$854
- Annual rent as a share of median income20.4 percent plus or minus 5.6
- Single family units436
- Share single family61.2 percent
- Units in buildings of two or more243 plus or minus 69
- Share in buildings of two or more34.1 percent plus or minus 9.0
- Mobile homes34 plus or minus 29
- Median year structure built1974
US Census Bureau, American Community Survey 5-Year Estimates, place level, 2020-2024 5-year.
Colby
How Colby gets to work
- Workers 16 and over who commute701
- Commuting under 15 minutes358 plus or minus 87
- Share commuting under 15 minutes51.1 percent
- Commuting 30 minutes or more178 plus or minus 62
- Share commuting 30 minutes or more25.4 percent plus or minus 7.8
- Drove alone79.5 percent
- Carpooled6.5 percent plus or minus 3.7
- Public transport0.0 percent
- Walked3.7 percent plus or minus 2.2
- Worked from home7.2 percent plus or minus 5.7
US Census Bureau, American Community Survey 5-Year Estimates, place level, 2020-2024 5-year.
Colby
SBA loans in Colby (7(a))
- Approvals3
- Gross approval$482,500
- Average approval$160,833
- Median approval$102,500
- Largest approval$350,000
- Jobs supported8
- Jobs per approval2.7
- Loans with a final outcome0
- Paid in full0
- Charged off0
- Median term120 months
- Share on real estate terms of 20 years or more0.0 percent
- Share to franchises0.0 percent
- Distinct lenders3
- Distinct industries by NAICS3
Counted by borrower city: approvals to borrowers whose address is in Colby, in any county, FY2020 to FY2026. Only 0 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.
Colby
Flood risk in Colby
- NFIP communityCity of Colby
- NFIP community number550049
- Participating in the NFIPYes
- Community Rating System classNone
- Currently effective map date07/22/10(M)
The City of Colby participates in the National Flood Insurance Program as community 550049 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.
Marathon County, not Colby
Marathon County context, not Colby figures
- Establishments in Marathon County3,436
- Covered employment, Marathon County70,626
- Average annual pay, Marathon County$57,976
- Housing units permitted, Marathon County408
Every figure in this section is published for Marathon County as a whole and is not a measurement of Colby.
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
Colby questions, answered from the record.
How many people live in Colby, Wisconsin?
1,907, in 689 households. Colby city covers 1.64 square miles of land, which is 1,165 people per square mile. Source: US Census Bureau, American Community Survey 5-Year Estimates, place level, 2020-2024 5-year.
What county is Colby in?
Colby lies in more than one. By area it is 53.1 percent in Marathon County, 46.9 percent in Clark County. This page sits under Marathon County because that county holds the largest share. The split is measured from the Census boundary of the place against the county boundaries.
What is the median household income in Colby?
$50,114. The median owner-occupied home is valued at $184,700. Median gross rent is $854 per month. Source: US Census Bureau, American Community Survey 5-Year Estimates, place level, 2020-2024 5-year.
How much SBA lending goes to Colby businesses?
3 7(a) approvals totaling $482,500 since FY2020, across 3 lenders, median approval $102,500. These count approvals to borrowers whose address is in Colby, not projects sited inside the place boundary, and they are approvals recorded in the release rather than loans disbursed.
Do SBA loans to Colby borrowers get paid back?
No rate is published for Colby. Only 0 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 Colby in the National Flood Insurance Program?
Yes. Colby appears in the FEMA Community Status Book as Colby, city of, community 550049, 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 Colby figures?
No, and they are labeled so. County Business Patterns, QCEW, the Building Permits Survey, BEA product and IRS migration are published for Marathon 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 Colby.
Is zoning published for Colby?
No. Nothing on this page presents parcel level zoning.