Population 10,313 · Census ACS 2020–24
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Population and households in Marathon
Household size in Marathon
| Period | Marathon | Florida | U.S. |
|---|---|---|---|
| 2006–10 | 2.26 | 2.63 | 2.68 |
| 2010–14 | 2.61 | 2.73 | 2.73 |
| 2015–19 | 2.22 | 2.75 | 2.71 |
| 2020–24 | 2.45 | 2.63 | 2.65 |
| Change | +0.19 | +0.00 | −0.03 |
The average household in Marathon has 2.45 people, under the U.S. average of 2.65. Household size has climbed from 2.26 in 2006–10, even as the national average fell.
Household size: the average number of people living in each occupied home. Source: BestNeighborhood calculations from U.S. Census Bureau ACS 5-year block-group estimates (table B25010).
Median age in Marathon
| Period | Marathon | Florida | U.S. |
|---|---|---|---|
| 2006–10 | 47.6 | 40.8 | 37.7 |
| 2010–14 | 44.1 | 42.0 | 38.6 |
| 2015–19 | 48.5 | 43.0 | 39.6 |
| 2020–24 | 46.8 | 43.5 | 40.1 |
| Change | −0.8 | +2.7 | +2.3 |
Marathon skews older: half of its residents are older than 46.8, well above the national median of 40.1. That usually means more empty nesters and retirees, and fewer young families. Since 2006–10, the median age has edged down from 47.6, even as the national median rose.
Median age: the age that splits residents into two equal halves. Source: BestNeighborhood calculations from U.S. Census Bureau ACS 5-year block-group estimates (table B01002).
Single-parent households in Marathon
| Period | Marathon | Florida | U.S. |
|---|---|---|---|
| 2006–10 | 9.1% | 12.4% | 12.3% |
| 2010–14 | 10.8% | 12.2% | 12.3% |
| 2015–19 | 10.8% | 11.5% | 11.6% |
| 2020–24 | 6.1% | 11.4% | 11.6% |
| Change | −3.0 pts | −1.0 pts | −0.6 pts |
Single parents head only 6.1% of households in Marathon, well below the national share of 11.6%. Since 2006–10, the single-parent share has fallen 3.0 points, a much bigger shift than nationally. Marathon has a lower share of single-parent households than at least four in five Florida cities.
Single-parent households: households where one adult with no spouse present lives with children under 18. Source: BestNeighborhood calculations from U.S. Census Bureau ACS 5-year block-group estimates (table B11003).
Housing in Marathon
Renters in Marathon
| Period | Marathon | Florida | U.S. |
|---|---|---|---|
| 2006–10 | 32.5% | 30.3% | 33.3% |
| 2010–14 | 38.2% | 33.9% | 35.6% |
| 2015–19 | 43.6% | 34.6% | 36.0% |
| 2020–24 | 39.5% | 32.4% | 34.8% |
| Change | +7.0 pts | +2.1 pts | +1.5 pts |
About four in ten households in Marathon rent their homes (39.5%), a bit above the national share of 34.8%. Among homeowners, 53.1% have no mortgage at all, well above the national share of 39.8%. Rentals cluster in the south; owners are most common in the northeast. Since 2006–10, the renter share has risen 7.0 points, a much bigger shift than nationally.
Renters: occupied homes that are rented rather than owned. Source: BestNeighborhood calculations from U.S. Census Bureau ACS 5-year block-group estimates (table B25003).
Vacant homes in Marathon
| Period | Marathon | Florida | U.S. |
|---|---|---|---|
| 2006–10 | 45.2% | 17.2% | 11.4% |
| 2010–14 | 48.8% | 17.6% | 11.4% |
| 2015–19 | 37.6% | 15.4% | 11.1% |
| 2020–24 | 39.9% | 12.5% | 9.6% |
| Change | −5.3 pts | −4.8 pts | −1.8 pts |
Vacancy is high in Marathon: 39.9% of homes are empty, far above the national rate of 9.6%. In resort and lake areas that usually means seasonal and vacation homes; elsewhere it can point to weak demand. Vacancy is down 5.3 points from 2006–10, in line with the national trend.
Vacant homes: homes with no one living in them, including vacation homes and homes for sale or rent. Source: BestNeighborhood calculations from U.S. Census Bureau ACS 5-year block-group estimates (table B25002).
Age of homes in Marathon
| Period | Marathon | Florida | U.S. |
|---|---|---|---|
| 2006–10 | 1978 | 1984 | 1974 |
| 2010–14 | 1979 | 1985 | 1975 |
| 2015–19 | 1977 | 1986 | 1977 |
| 2020–24 | 1984 | 1989 | 1980 |
| Change | +6 | +5 | +6 |
Homes in Marathon are a bit newer than the national norm: the median home was built in 1984, versus 1980 across the U.S. Even so, homes here are older than in Florida overall, where the median home dates to 1989. The median year built has moved up from 1978 in 2006–10, a sign of steady new building.
Age of homes: the year that splits the housing stock into older and newer halves. Source: BestNeighborhood calculations from U.S. Census Bureau ACS 5-year block-group estimates (table B25035).
Rent in Marathon
| Period | Marathon | Florida | U.S. |
|---|---|---|---|
| 2006–10 | $1,038 | $1,092 | $965 |
| 2010–14 | $1,205 | $1,123 | $1,040 |
| 2015–19 | $1,406 | $1,323 | $1,213 |
| 2020–24 | $1,825 | $1,816 | $1,571 |
| Change | +$787 | +$724 | +$606 |
The median renter in Marathon pays $1,825 a month for rent and utilities, above the national median of $1,571. Rent has climbed $787 a month since 2006–10, up 76%, faster than rents rose nationally. The typical renter here spends 30.4% of household income on rent, just over the 30% mark often used to define affordable rent. Rents run highest in the northeast and lowest in the southwest.
Rent: monthly rent plus the utilities renters pay themselves. Source: BestNeighborhood calculations from U.S. Census Bureau ACS 5-year block-group estimates (table B25064).
Education in Marathon
Bachelor's degrees in Marathon
| Period | Marathon | Florida | U.S. |
|---|---|---|---|
| 2006–10 | 33.4% | 26.4% | 28.4% |
| 2010–14 | 25.5% | 27.0% | 29.6% |
| 2015–19 | 31.5% | 30.0% | 32.1% |
| 2020–24 | 34.0% | 34.6% | 35.6% |
| Change | +0.6 pts | +8.2 pts | +7.2 pts |
About a third of adults 25 and older in Marathon (34.0%) hold at least a bachelor's degree, close to the national share of 35.6%. The share with a degree is up 0.6 points from 2006–10, a smaller shift than nationally. College graduates are most concentrated in the northeast and least in the south.
Bachelor's degrees: adults 25 and older with a bachelor's degree or higher. Source: BestNeighborhood calculations from U.S. Census Bureau ACS 5-year block-group estimates (table B15003).
High school graduates in Marathon
| Period | Marathon | Florida | U.S. |
|---|---|---|---|
| 2006–10 | 90.4% | 85.5% | 84.9% |
| 2010–14 | 89.9% | 86.5% | 86.1% |
| 2015–19 | 89.9% | 88.2% | 87.7% |
| 2020–24 | 90.8% | 90.0% | 89.3% |
| Change | +0.4 pts | +4.4 pts | +4.3 pts |
About nine in ten adults in Marathon have finished high school (90.8%), a bit above the national rate of 89.3%. The picture is much the same across Florida.
High school graduates: adults 25 and older with a high school diploma, GED or more. Source: BestNeighborhood calculations from U.S. Census Bureau ACS 5-year block-group estimates (table B15003).
Jobs in Marathon
| Period | Marathon | Florida | U.S. |
|---|---|---|---|
| 2006–10 | 5.7% | 8.9% | 8.1% |
| 2010–14 | 7.6% | 11.0% | 9.4% |
| 2015–19 | 3.4% | 5.7% | 5.6% |
| 2020–24 | 3.9% | 4.8% | 5.4% |
| Change | −1.8 pts | −4.1 pts | −2.7 pts |
Unemployment in Marathon runs below the national rate: 3.9% of the labor force was out of work and looking, against 5.4% nationally. Unemployment is down 1.8 points from 2006–10, as it has nationally. Because the Census pools five years of responses (2020–24), these rates smooth over short swings and lag the current job market.
Unemployment: people looking for work as a share of everyone working or looking. Source: BestNeighborhood calculations from U.S. Census Bureau ACS 5-year block-group estimates (table B23025).
Marathon compared with nearby cities
| City | Household size | Median age | Single parents | Renters | Vacant homes | Median year built | Median rent | Bachelor's degree | High school diploma | Unemployment |
|---|---|---|---|---|---|---|---|---|---|---|
| Marathon | 2.45 | 46.8 | 6.1% | 39.5% | 39.9% | 1984 | $1,825 | 34.0% | 90.8% | 3.9% |
| Key Colony Beach | 1.88 | 68.8 | 4.6% | 25.0% | 66.0% | 1983 | $2,488 | 38.8% | 97.3% | 0.0% |
| Long Key | 1.80 | 65.3 | 0.9% | 24.9% | 74.4% | 1984 | $2,075 | 40.9% | 97.9% | 10.7% |
| Layton | 1.80 | 65.3 | 0.9% | 24.9% | 74.4% | 1984 | $2,075 | 40.9% | 97.9% | 10.7% |
| Rock Harbor | 2.28 | 51.3 | 1.4% | 4.7% | 37.1% | 1986 | $2,321 | 33.9% | 96.7% | 1.7% |
| Big Pine Key | 2.25 | 51.8 | 7.7% | 11.7% | 37.2% | 1987 | $2,142 | 31.2% | 97.4% | 2.1% |
| Plantation Key | 2.28 | 59.3 | 5.3% | 12.9% | 65.8% | 1983 | $1,730 | 29.3% | 95.7% | 0.0% |
| Summerland Key | 2.30 | 51.1 | 6.3% | 17.1% | 37.3% | 1991 | $2,217 | 46.0% | 96.6% | 4.1% |
| Cudjoe Key | 2.26 | 61.2 | 10.2% | 29.3% | 43.3% | 2001 | $1,732 | 40.6% | 98.7% | 0.0% |
| Islamorada | 2.17 | 56.5 | 5.4% | 16.3% | 50.0% | 1983 | $2,116 | 43.8% | 95.4% | 0.0% |
| Sugarloaf Shores | 2.35 | 52.6 | 12.2% | 16.0% | 31.7% | 1992 | $2,272 | 39.0% | 95.4% | 7.6% |
All figures 2020–24.
Cities with similar populations: Vicksburg, MI · Creedmoor, NC · Crestline, CA · Crestwood, IL · Creswell, OR · Cross Lanes, WV · Tremonton, UT · Tres Hermanos, PR · Triangle, VA · Tuttle, OK
About these numbers
Every figure on this page is a BestNeighborhood calculation from the Census Bureau's American Community Survey (ACS), built up from the Census block groups that make up Marathon. Each ACS 5-year release pools five years of responses; this page shows the last 15 releases, 2006–10 through 2020–24. Neighboring releases share four of their five years, so they move gradually and small changes between them are within the survey's margin of error; in small places the lines can jump from one release to the next for the same reason. The maps show the same measures for each neighborhood, ranked against the whole country.
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