Population 30 · Census ACS 2020–24
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Population and households in Merrimac
Household size in Merrimac
| Period | Merrimac | St. Louis area | Illinois | U.S. |
|---|---|---|---|---|
| 2006–10 | 2.99 | 2.52 | 2.69 | 2.68 |
| 2010–14 | 2.98 | 2.53 | 2.71 | 2.73 |
| 2015–19 | 2.82 | 2.49 | 2.66 | 2.71 |
| 2020–24 | 2.76 | 2.46 | 2.58 | 2.65 |
| Change | −0.23 | −0.06 | −0.11 | −0.03 |
The typical household in Merrimac holds 2.76 people, slightly more than the U.S. average of 2.65. Household size has dropped from 2.99 in 2006–10, but in a place this small, much of that may be survey noise rather than real change.
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 Merrimac
| Period | Merrimac | St. Louis area | Illinois | U.S. |
|---|---|---|---|---|
| 2006–10 | 33.1 | 38.5 | 37.6 | 37.7 |
| 2010–14 | 35.6 | 39.5 | 38.5 | 38.6 |
| 2015–19 | 39.3 | 40.7 | 39.6 | 39.6 |
| 2020–24 | 43.1 | 40.8 | 40.2 | 40.1 |
| Change | +10.0 | +2.3 | +2.6 | +2.3 |
Merrimac skews older than the country: its median age is 43.1, against 40.1 nationally.
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 Merrimac
| Period | Merrimac | St. Louis area | Illinois | U.S. |
|---|---|---|---|---|
| 2006–10 | 6.2% | 11.7% | 11.7% | 12.3% |
| 2010–14 | 11.7% | 11.5% | 11.7% | 12.3% |
| 2015–19 | 9.4% | 11.0% | 11.1% | 11.6% |
| 2020–24 | 6.8% | 11.1% | 11.3% | 11.6% |
| Change | +0.6 pts | −0.6 pts | −0.4 pts | −0.6 pts |
Single-parent households are relatively rare in Merrimac: 6.8% of households, against 11.6% nationally.
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 Merrimac
Renters in Merrimac
| Period | Merrimac | St. Louis area | Illinois | U.S. |
|---|---|---|---|---|
| 2006–10 | 12.1% | 28.3% | 30.8% | 33.3% |
| 2010–14 | 21.0% | 30.1% | 33.1% | 35.6% |
| 2015–19 | 16.9% | 31.1% | 33.9% | 36.0% |
| 2020–24 | 18.9% | 29.6% | 32.9% | 34.8% |
| Change | +6.8 pts | +1.4 pts | +2.1 pts | +1.5 pts |
Merrimac is largely a place of homeowners: only 18.9% of households rent, far below the national share of 34.8%. Owner-heavy areas like this tend to see less turnover. Among homeowners, 27.4% have no mortgage at all, well below the national share of 39.8%.
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 Merrimac
| Period | Merrimac | St. Louis area | Illinois | U.S. |
|---|---|---|---|---|
| 2006–10 | 5.6% | 9.6% | 10.0% | 11.4% |
| 2010–14 | 8.2% | 10.1% | 10.1% | 11.4% |
| 2015–19 | 5.4% | 10.1% | 9.8% | 11.1% |
| 2020–24 | 6.4% | 8.8% | 8.1% | 9.6% |
| Change | +0.8 pts | −0.8 pts | −1.9 pts | −1.8 pts |
Fewer homes sit empty in Merrimac than nationally: 6.4%, against 9.6% for the U.S.
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 Merrimac
| Period | Merrimac | St. Louis area | Illinois | U.S. |
|---|---|---|---|---|
| 2006–10 | 1998 | 1972 | 1966 | 1974 |
| 2010–14 | 2001 | 1972 | 1967 | 1975 |
| 2015–19 | 1998 | 1973 | 1968 | 1977 |
| 2020–24 | 2000 | 1975 | 1970 | 1980 |
| Change | +2 | +3 | +4 | +6 |
Merrimac has newer housing than the country as a whole: the median home was built in 2000, versus 1980 nationally.
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 Merrimac
| Period | Merrimac | St. Louis area | Illinois | U.S. |
|---|---|---|---|---|
| 2006–10 | $792 | $825 | $953 | $965 |
| 2010–14 | $1,059 | $920 | $1,028 | $1,040 |
| 2015–19 | $997 | $1,010 | $1,165 | $1,213 |
| 2020–24 | $1,120 | $1,239 | $1,428 | $1,571 |
| Change | +$328 | +$414 | +$475 | +$606 |
A typical rental in Merrimac costs $1,120 a month with utilities, well below the national median of $1,571. Rent takes 17.0% of the typical renter's income, comfortably under the 30% mark often used to define affordable rent.
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 Merrimac
Bachelor's degrees in Merrimac
| Period | Merrimac | St. Louis area | Illinois | U.S. |
|---|---|---|---|---|
| 2006–10 | 18.5% | 30.3% | 31.2% | 28.4% |
| 2010–14 | 24.6% | 32.1% | 32.4% | 29.6% |
| 2015–19 | 30.1% | 34.9% | 34.7% | 32.1% |
| 2020–24 | 20.4% | 38.5% | 37.7% | 35.6% |
| Change | +1.9 pts | +8.3 pts | +6.5 pts | +7.2 pts |
College degrees are relatively uncommon in Merrimac: 20.4% of adults 25 and older hold a bachelor's or higher, well below the national share of 35.6%.
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 Merrimac
| Period | Merrimac | St. Louis area | Illinois | U.S. |
|---|---|---|---|---|
| 2006–10 | 92.1% | 88.8% | 86.3% | 84.9% |
| 2010–14 | 95.1% | 90.5% | 87.5% | 86.1% |
| 2015–19 | 96.6% | 92.1% | 89.1% | 87.7% |
| 2020–24 | 93.7% | 93.6% | 90.3% | 89.3% |
| Change | +1.6 pts | +4.8 pts | +4.0 pts | +4.3 pts |
High school completion in Merrimac is above the national rate: 93.7% of adults have a diploma, against 89.3%. That is in line with the rest of the St. Louis area.
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 Merrimac
| Period | Merrimac | St. Louis area | Illinois | U.S. |
|---|---|---|---|---|
| 2006–10 | 4.9% | 7.7% | 8.7% | 8.1% |
| 2010–14 | 7.2% | 8.8% | 10.2% | 9.4% |
| 2015–19 | 4.1% | 4.9% | 6.1% | 5.6% |
| 2020–24 | 0.5% | 4.3% | 6.0% | 5.4% |
| Change | −4.4 pts | −3.4 pts | −2.7 pts | −2.7 pts |
Unemployment in Merrimac has been low: just 0.5% of the labor force was out of work and looking, well below the national rate of 5.4%. 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).
Merrimac 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 |
|---|---|---|---|---|---|---|---|---|---|---|
| Merrimac | 2.76 | 43.1 | 6.8% | 18.9% | 6.4% | 2000 | $1,120 | 20.4% | 93.7% | 0.5% |
| Fountain Gap | 2.77 | 44.0 | 5.9% | 14.1% | 5.0% | 1998 | $1,129 | 27.1% | 93.5% | 0.9% |
| Valmeyer | 2.69 | 44.8 | 6.2% | 18.7% | 7.3% | 1996 | $1,086 | 20.4% | 93.5% | 1.0% |
| Imperial | 2.78 | 39.9 | 10.6% | 16.5% | 4.4% | 1993 | $1,137 | 26.9% | 94.1% | 2.9% |
| Arnold | 2.50 | 41.5 | 10.1% | 20.0% | 6.6% | 1984 | $1,092 | 26.3% | 91.4% | 3.2% |
| Foster Pond | 2.87 | 42.4 | 1.8% | 9.3% | 4.7% | 1994 | $1,218 | 35.7% | 95.6% | 2.1% |
| Oakville | 2.55 | 44.3 | 6.3% | 13.9% | 2.4% | 1983 | $1,135 | 44.1% | 96.3% | 4.1% |
| Barnhart | 2.69 | 38.9 | 21.8% | 7.4% | 3.7% | 1987 | $1,342 | 26.1% | 95.8% | 2.9% |
| New Hanover | 2.37 | 48.9 | 1.7% | 18.8% | 14.9% | 1993 | $1,117 | 47.4% | 96.3% | 0.1% |
| Pevely | 2.59 | 36.9 | 11.0% | 23.4% | 9.8% | 1992 | $898 | 17.2% | 89.7% | 2.9% |
| Wartburg | 2.80 | 44.9 | 0.3% | 1.3% | 4.1% | 1984 | $795 | 38.7% | 95.1% | 3.2% |
All figures 2020–24.
Cities with similar populations: Willow Ranch, CA · Beryl Junction, UT · Bethany, IN · Big Piney, MO · Bigstone, KY · Whitehall, AR · Whitney, MS · Wickes, MT · Wilburton Number Two, PA · Wilfred, IN
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 Merrimac. 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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