St. Charles County
OKLocate's data coverage for St. Charles County includes address level insights, mapping layers, property profiles (coming Q4 2026) and census demographics.
St. Charles County is part of the St. Louis, MO-IL metropolitan statistical area.
LiDAR measurements, aerial imagery, typeahead, geocoding and census demographics behind one API key, on one flat monthly rate, and every result is yours to store with no time limit. No other location API puts that combination under permissive licensing.
Address level data
- Forward geocoding · Address to rooftop coordinate
- Reverse geocoding · Coordinate to nearest address
- Typeahead · About 100 ms
- County FIPS on every result
- Census tract on every result (Q4 2026)
- Place on every result (Q4 2026)
- School district on every result (Q4 2026)
- Legislative districts on every result (Q4 2026)
Mapping
- Base map · Vector tiles, your own styling
- Aerial imagery · To zoom 15
- High-resolution aerial, zoom 16 to 18 (Q4 2026)
- Flood zone boundaries · FEMA NFHL
- School district boundaries
- Place boundaries
- ZIP code boundaries
- Census tract boundaries
- Legislative boundaries (Q4 2026)
Property measurements
- Measured property profiles (Q4 2026)
- Roof, solar and pool measurements (Q4 2026)
- Viewable LiDAR point cloud per home (Q4 2026)
- Search the county on any measured field (Q4 2026)
Demographics
- Population and households
- Housing units, owner and renter
- Median home value and rent
- Median household income
- Year built and unit types
- FEMA flood share and zone breakdown
St. Charles County by the numbers
- Housing units
- 167,163
- Population
- 414,535
- Owner occupied
- 129,898
- Median home value
- $325,081
- Median household income
- $108,621
- Median year built
- 1993
- Census tracts
- 85
- Land area
- 561 sq mi
Flood zones
40% of St. Charles County's land lies inside a FEMA Special Flood Hazard Area. That is higher than 98% of US counties. The largest zones are X at 60% and AE at 40%. This is a map overlay for analysis, not a flood determination.
- Zone X
- 59.71%
- Zone AE
- 39.71%
- Zone A
- 0.57%