Population 3,211 · Census ACS 2020–24
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Population and households in O'Fallon
Household size in O'Fallon
| Period | O'Fallon | St. Louis area | Missouri | U.S. |
|---|---|---|---|---|
| 2006–10 | 2.84 | 2.52 | 2.49 | 2.68 |
| 2010–14 | 2.76 | 2.53 | 2.52 | 2.73 |
| 2015–19 | 2.38 | 2.49 | 2.50 | 2.71 |
| 2020–24 | 1.78 | 2.46 | 2.49 | 2.65 |
| Change | −1.06 | −0.06 | −0.00 | −0.03 |
O'Fallon is a place of small households, averaging 1.78 people against 2.65 for the U.S., which points to many singles, couples and roommates and relatively few children. Household size has dropped from 2.84 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 O'Fallon
| Period | O'Fallon | St. Louis area | Missouri | U.S. |
|---|---|---|---|---|
| 2006–10 | 36.2 | 38.5 | 38.4 | 37.7 |
| 2010–14 | 38.0 | 39.5 | 39.2 | 38.6 |
| 2015–19 | 44.6 | 40.7 | 40.0 | 39.6 |
| 2020–24 | 44.9 | 40.8 | 40.1 | 40.1 |
| Change | +8.7 | +2.3 | +1.7 | +2.3 |
With a median age of 44.9, O'Fallon is noticeably older than the country as a whole (40.1), an age mix that tilts toward empty nesters and retirees. O'Fallon is older than at least four in five St. Louis neighborhoods.
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 O'Fallon
| Period | O'Fallon | St. Louis area | Missouri | U.S. |
|---|---|---|---|---|
| 2006–10 | 34.5% | 11.7% | 11.3% | 12.3% |
| 2010–14 | 32.7% | 11.5% | 11.4% | 12.3% |
| 2015–19 | 24.1% | 11.0% | 10.9% | 11.6% |
| 2020–24 | 13.4% | 11.1% | 11.0% | 11.6% |
| Change | −21.1 pts | −0.6 pts | −0.3 pts | −0.6 pts |
Single-parent households are a bit more common in O'Fallon than nationally: 13.4%, against 11.6%. O'Fallon has a higher share of single-parent households than most St. Louis neighborhoods.
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 O'Fallon
Renters in O'Fallon
| Period | O'Fallon | St. Louis area | Missouri | U.S. |
|---|---|---|---|---|
| 2006–10 | 55.2% | 28.3% | 30.0% | 33.3% |
| 2010–14 | 57.7% | 30.1% | 32.1% | 35.6% |
| 2015–19 | 61.2% | 31.1% | 33.2% | 36.0% |
| 2020–24 | 63.7% | 29.6% | 31.9% | 34.8% |
| Change | +8.6 pts | +1.4 pts | +1.9 pts | +1.5 pts |
Renters far outnumber owners in O'Fallon: 63.7% of households rent their homes, against 34.8% nationally. Among homeowners, 82.1% have no mortgage at all, well above 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 O'Fallon
| Period | O'Fallon | St. Louis area | Missouri | U.S. |
|---|---|---|---|---|
| 2006–10 | 22.0% | 9.6% | 11.6% | 11.4% |
| 2010–14 | 27.4% | 10.1% | 12.0% | 11.4% |
| 2015–19 | 36.0% | 10.1% | 12.2% | 11.1% |
| 2020–24 | 29.8% | 8.8% | 10.5% | 9.6% |
| Change | +7.8 pts | −0.8 pts | −1.1 pts | −1.8 pts |
Vacant homes make up 29.8% of the housing in O'Fallon, 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. Only three of St. Louis' 39 neighborhoods have a higher vacancy rate.
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 O'Fallon
| Period | O'Fallon | St. Louis area | Missouri | U.S. |
|---|---|---|---|---|
| 2006–10 | 1942 | 1972 | 1974 | 1974 |
| 2010–14 | 1941 | 1972 | 1975 | 1975 |
| 2015–19 | 1938 | 1973 | 1976 | 1977 |
| 2020–24 | 1938 | 1975 | 1978 | 1980 |
| Change | −4 | +3 | +4 | +6 |
O'Fallon is a place of older homes: half were built before 1938, while the national median is 1980. That means established neighborhoods, and more houses that may need updating. O'Fallon has older homes than the great majority of St. Louis neighborhoods.
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 O'Fallon
| Period | O'Fallon | St. Louis area | Missouri | U.S. |
|---|---|---|---|---|
| 2006–10 | $645 | $825 | $740 | $965 |
| 2010–14 | $775 | $920 | $816 | $1,040 |
| 2015–19 | $731 | $1,010 | $899 | $1,213 |
| 2020–24 | $771 | $1,239 | $1,122 | $1,571 |
| Change | +$126 | +$414 | +$383 | +$606 |
A typical rental in O'Fallon costs $771 a month with utilities, well below the national median of $1,571. Rent takes 40.1% of the typical renter's income, well over the 30% mark often used to define affordable rent, so many renters here are stretched. Only one other St. Louis neighborhood has lower rents.
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 O'Fallon
Bachelor's degrees in O'Fallon
| Period | O'Fallon | St. Louis area | Missouri | U.S. |
|---|---|---|---|---|
| 2006–10 | 9.5% | 30.3% | 26.0% | 28.4% |
| 2010–14 | 6.6% | 32.1% | 27.3% | 29.6% |
| 2015–19 | 15.3% | 34.9% | 29.6% | 32.1% |
| 2020–24 | 8.9% | 38.5% | 32.6% | 35.6% |
| Change | −0.6 pts | +8.3 pts | +6.6 pts | +7.2 pts |
College degrees are relatively uncommon in O'Fallon: 8.9% of adults 25 and older hold a bachelor's or higher, well below the national share of 35.6%. O'Fallon has the lowest share of college graduates of any St. Louis neighborhood.
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 O'Fallon
| Period | O'Fallon | St. Louis area | Missouri | U.S. |
|---|---|---|---|---|
| 2006–10 | 67.4% | 88.8% | 86.8% | 84.9% |
| 2010–14 | 71.4% | 90.5% | 88.3% | 86.1% |
| 2015–19 | 77.4% | 92.1% | 90.0% | 87.7% |
| 2020–24 | 85.6% | 93.6% | 91.8% | 89.3% |
| Change | +18.1 pts | +4.8 pts | +5.1 pts | +4.3 pts |
About one in seven adults in O'Fallon never finished high school, more than nationally: 85.6% have a diploma or equivalent, against 89.3% across the U.S. Compared with other St. Louis neighborhoods, O'Fallon has a lower share of high school graduates than most.
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 O'Fallon
| Period | O'Fallon | St. Louis area | Missouri | U.S. |
|---|---|---|---|---|
| 2006–10 | 22.2% | 7.7% | 7.4% | 8.1% |
| 2010–14 | 29.1% | 8.8% | 8.4% | 9.4% |
| 2015–19 | 14.1% | 4.9% | 4.6% | 5.6% |
| 2020–24 | 17.4% | 4.3% | 4.1% | 5.4% |
| Change | −4.8 pts | −3.4 pts | −3.3 pts | −2.7 pts |
Finding work has been harder in O'Fallon: 17.4% of the labor force was out of work and looking, well above the national rate of 5.4%. Only one other St. Louis neighborhood has higher unemployment. Each figure pools five years of surveys (2020–24), so it describes that whole stretch rather than today's 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).
O'Fallon compared with nearby neighborhoods
| Neighborhood | Household size | Median age | Single parents | Renters | Vacant homes | Median year built | Median rent | Bachelor's degree | High school diploma | Unemployment |
|---|---|---|---|---|---|---|---|---|---|---|
| O'Fallon | 1.78 | 44.9 | 13.4% | 63.7% | 29.8% | 1938 | $771 | 8.9% | 85.6% | 17.4% |
| Penrose | 2.54 | 41.7 | 28.4% | 56.6% | 27.8% | 1939 | $1,161 | 17.2% | 83.3% | 11.7% |
| The Greater Ville | 2.14 | 44.1 | 13.9% | 62.7% | 35.5% | 1940 | $885 | 11.9% | 78.8% | 9.8% |
| Jeff-Vander-Lou | 2.01 | 48.3 | 15.4% | 79.2% | 29.5% | 1958 | $891 | 14.8% | 81.4% | 5.9% |
| Mark Twain | 1.98 | 47.6 | 12.9% | 38.7% | 32.3% | 1944 | $876 | 16.3% | 85.4% | 29.0% |
| Grand Center | 1.75 | 30.7 | 20.3% | 90.7% | 17.4% | 1967 | $881 | 25.7% | 89.9% | 3.2% |
| Wells-Goodfellow | 2.63 | 35.1 | 37.2% | 69.9% | 31.2% | 1949 | $881 | 12.2% | 83.6% | 14.8% |
| Central West End | 1.58 | 34.4 | 2.8% | 73.1% | 12.8% | 1961 | $1,142 | 71.6% | 96.3% | 1.6% |
| Midtown St. Louis | 1.44 | 25.1 | 5.8% | 90.6% | 18.8% | 1986 | $1,075 | 56.2% | 95.3% | 3.7% |
| North Pointe | 2.62 | 38.3 | 31.0% | 43.5% | 9.2% | 1946 | $1,206 | 13.4% | 92.4% | 6.1% |
| Baden | 2.09 | 49.3 | 22.1% | 43.8% | 21.5% | 1949 | $931 | 12.0% | 86.0% | 8.0% |
All figures 2020–24.
Neighborhoods with similar populations: Gaffney Lane, Oregon City, OR · Bryce Canyon North, Oxnard, CA · Sunnyland, Washington, IL · San Antonio Creekside, San Antonio, TX · Rock Spring, Arlington, VA · West Sharyland, Mission, TX · San Jose Forest, Jacksonville, FL · Arlington, Birmingham, AL · Independence Plaza, Kansas City, MO · Pine Brook, Camp Hill, PA
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 O'Fallon. 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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