St. Charles receives the higher standardized Area Score. That reflects AreaProfile's weighting, not a judgment about which place is better to live in.
Signals
Union
St. Charles
Opportunity
70 · Top 22%
vs76 · Top 12%
Growth
62 · Top 30%
vs60 · Top 32%
Climate
70 · Bottom 49%
vs68 · Bottom 39%
Physical resilience
49 · Bottom 41%
vs50 · Bottom 43%
Housing affordability
100 · Top 8%
vs95 · Top 21%
Schools
57 · Top 42%
vs77 · Top 18%
Access
75 · Bottom 17%
vs97 · Top 29%
Economic stability
65 · Top 39%
vs65 · Top 39%
Measured values
| Metric | Union | St. Charles | Source period |
|---|---|---|---|
| Population | 12,781 | 71,508 | 2024 ACS 5-Year |
| Median household income | $73,435 | $85,937 | 2024 ACS 5-Year |
| Per capita income | $33,416 | $49,608 | 2024 ACS 5-Year |
| Population density | 1,406/sq mi | 2,836/sq mi | 2024 ACS 5-Year |
| Median home value | $205,200 | $298,700 | 2024 ACS 5-Year |
| Median gross rent | $858 | $1,251 | 2024 ACS 5-Year |
| Homeownership rate | 60.6% | 68.0% | 2024 ACS 5-Year |
| Unemployment rate | 3.5% | 3.6% | June 2026 |
| Employment change (year over year) | 0.1% | 0.2% | June 2026 |
| Bachelor's degree or higher | 23.7% | 43.3% | 2024 ACS 5-Year |
| Poverty rate | 8.1% | 7.3% | 2024 ACS 5-Year |
| Housing units permitted (12 months) | 115 | 283 | 12 months ending July 2026 |
| Permits per 1,000 residents | 9.0 | 4.0 | 12 months ending July 2026 |
| Permit change (year over year) | -40.1% | 7.2% | 12 months ending July 2026 |
| Average July high | 90°F | 90°F | 1991-2020 Normals |
| Average January low | 22°F | 24°F | 1991-2020 Normals |
| Annual precipitation | 39.8" | 41.7" | 1991-2020 Normals |
| Distance to major airport | 40 mi | 8 mi | NASR current cycle |
| Average commute | 26.3 min | 23.2 min | 2024 ACS 5-Year |
| Median age | 33.3 | 38.6 | 2024 ACS 5-Year |
| Public schools | 7 | 23 | 2024-25 school year |
| Students per teacher | 13.31 | 12.43 | 2024-25 school year |
| Math proficiency | 42.0% | 48.7% | 2019-20 school year |
| Reading proficiency | 45.2% | 57.0% | 2019-20 school year |
| Free or reduced-price lunch eligibility | 45.0% | 28.3% | 2024-25 school year |
A bolded value is the more favorable of the two where the metric has a clear direction. Metrics like population and density have no inherent better or worse and are shown unweighted.
Physical risk tradeoff
Union
Elevated or high exposure: earthquake, hail, inland flooding.
St. Charles
Elevated or high exposure: hail, earthquake, inland flooding.
Your best match
Weight what matters to you. Your preferences stay in this browser and never change either Area Score.
Union
69
Your Score
68
Area Score
St. Charles
73
Your Score
72
Area Score
Select your priorities to see which of the two fits them better.
Full profiles: Union, MO · St. Charles, MO · How this is calculated: methodology