St. Peters, Missouri Demographics
Population trends, housing costs, income, commuting, and health, all on one page.
St. Peters, MO Population Density Map and Area Scores
Area Score
Health, income and education, each graded from F to A+. Explore interactive maps for deeper analysis.
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A
Health Above average
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B
Income Around average
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B
Education Around average
Source: Map AI Methodology
Population
| Metric | St. Peters | Missouri Avg | U.S. Average |
|---|---|---|---|
| Population | 58,257 | 6,186,340 | 337,468,954 |
| Population density (per sq mi) | 2588.0 | 88.8 | 86.4 |
| Population growth (%/yr) | 0.60% | 0.28% | 0.59% |
| Median age | 42.3 | 37.5 | 37.3 |
| Households | 23,547 | 2,507,647 | 130,235,071 |
Population in St. Peters grew by 8.0% from 2009 to 2024, reaching 58,257 in 2024.
Population Growth 2009–2024
Race & Ethnicity
Age & Sex
The largest generation in St. Peters is Millennials, aged 29–44, at 22.0% of residents. That is 0.8 points above Missouri as a whole.
- Gen Z 13–28 11,120 19.1% -2.1 pts
- Millennials 29–44 12,842 22.0% +0.8 pts
- Gen X 45–60 12,451 21.4% +1.8 pts
- Boomers 61–79 10,185 17.5% -0.4 pts
Residents by birth cohort, from the 2025 age distribution. The right-hand figure is how far each cohort's share sits above or below Missouri, in percentage points. Children younger than Gen Z and the generations before the Boomers are counted in the population but not shown here, so these shares do not add up to 100%.
Male and female share
Women are 52.0% of the people living in St. Peters and men 48.0%.
- Women 52.0% Missouri 50.7%
- Men 48.0% Missouri 49.3%
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Economy
St. Peters has a the economy index of B, which means it is quite prosperous.
| Metric | St. Peters | Missouri Avg | U.S. Average |
|---|---|---|---|
| Median household income | $94,320 | $70,801 | $80,455 |
| Income growth (%/yr) | 3.11% | 4.56% | 4.80% |
| Unemployment rate | 2.6% | 4.0% | 5.2% |
The median household income in St. Peters is about 33% higher than in Missouri.
Housing
| Metric | St. Peters | Missouri Avg | U.S. Average |
|---|---|---|---|
| Median home price | $202,650 | $145,462 | $248,835 |
| Median rent | $1,369 | $1,033 | $1,407 |
| Homeownership rate | 82.1% | 68.1% | 65.2% |
The median home price in St. Peters is about 12.3 years' worth of rent — buying at the median price costs roughly as much as paying the median rent of $1,369 per month for that long.
Commute Time & Mobility
Commuters in St. Peters spend about 43 minutes on the road round trip each working day. Over a typical 250-day work year, that adds up to roughly 178 hours, about 7.4 full days, spent commuting.
| Metric | St. Peters | Missouri Avg | U.S. Average |
|---|---|---|---|
| One-way commute (min) | 21.4 | 21.0 | 22.4 |
| Round-trip commute (min) | 42.8 | 41.9 | 44.8 |
| Yearly time spent (hours) | 178 | 175 | 187 |
| Estimated yearly cost | $5,532 | $5,415 | $5,790 |
| Work from home | 17.3% | 13.0% | 15.0% |
| Highway traffic (vehicles/day) | 18,132 | 7,545 | 8,813 |
| Local road traffic (vehicles/day) | 3,158 | 923 | 1,355 |
The average commute time in St. Peters is about the same as in Missouri.
Estimated yearly cost applies a single national wage rule of thumb (U.S. Bureau of Labor Statistics average hourly earnings), not a measurement of wages in this area. Traffic volume figures come from proprietary Ticon and TrafficZoom data.
Education & Households
St. Peters has a education index of B, which means it is quite educated.
| Metric | St. Peters | Missouri Avg | U.S. Average |
|---|---|---|---|
| Bachelor's degree or higher | 35.6% | 28.8% | 31.6% |
| Average household size | 2.45 | 2.40 | 2.53 |
Health
St. Peters has a health index of A, which means it is very healthy.
| Metric | St. Peters | Missouri Avg | U.S. Average |
|---|---|---|---|
| Life expectancy (years) | 79.9 | 76.9 | 78.3 |
| Self-rated poor health | 10.9% | 19.0% | 16.3% |
| Smokers | 15.3% | 22.8% | 19.0% |
St. Peters, MO Compared With Nearby Cities
How St. Peters, MO compares with the 2 cities closest to it.
| Area | Population | Median household income | Median home price | Commute |
|---|---|---|---|---|
| St. Peters, MO | 58,257 | $94,320 #2/3 | $202,650 #3/3 | 21.4 min #2/3 |
| St. Charles, MO | 68,558 | $84,562 | $340,034 | 21.0 min |
| O'Fallon, MO | 75,454 | $112,057 | $281,874 | 23.5 min |
Frequently Asked Questions
Common questions about St. Peters, Missouri.
How many people live in St. Peters, Missouri?
About 58,257 people live in St. Peters, Missouri, in 23,547 households of 2.5 people on average. The median age is 42.3, so residents are older than the U.S. median of 37.3 by about 5 years.
Is St. Peters, Missouri mostly urban or rural?
Averaged over its land area, St. Peters, Missouri has 2,588 people per square mile, a density typical of urban and suburban areas. That is about 30 times the U.S. average of 86.
Can a typical household afford a home in St. Peters, Missouri?
The median home costs 2.1 times the median household income ($202,650 against $94,320), compared with 3.1 times nationally. That is within the traditional rule of thumb of about 3 times income. Median rent of $1,369 a month takes about 17% of the median household's income, below the 30% level at which HUD considers renters cost-burdened.
How strong is the job market in St. Peters, Missouri?
Unemployment in St. Peters, Missouri is only 2.6%, well below the U.S. rate of 5.2%, a sign of a tight labor market where employers compete for workers.
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