Mason County
City in Illinois, United States
Overview
Mason County, Illinois, is a quintessential rural American county known for its small-town atmosphere, historic roots, and vast natural spaces along the Illinois River. The area offers a relaxing escape with friendly communities, local events, and access to outdoor adventures.
Geographic Context
Jurisdiction
United States
State
Illinois
Population
65,726
Time Zone
America/Chicago
Coordinates
40.24°, -89.92°
Key Metrics
Safety Score · estimate
70
Female Safety
65
LGBTQ+ Safety
60
Traffic Safety
75
Food Safety
85
Monthly Cost · estimate
$1,805
Local Cost
$1,090
Local Income
$2,700
Cashless
65
English
99
Temperature
11.7°C
Summer Avg
24.0°C
Winter Avg
-1.7°C
Record High
43.1°C
Record Low
-28.2°C
Humidity
76%
Precipitation
984 mm
City Vibrancy
—
Coworking
0
Cafes
0
Nightlife
0
Parks
0
Transport
0
Walk Score
0
Footways
—
Airport
SPI
Distance
48 km
Explore
Data sources
Source-backed data
World Air Quality Index - Latest available city-level air quality station measurement. Record updated 2025-12-05.
OpenStreetMap - Nearby amenities counted from OpenStreetMap-derived city extracts. Record updated 2025-12-06.
OpenStreetMap transport extract - Walkability, footway density, and airport access metrics derived from mapped transport features. Record updated 2025-12-05.
Estimates and unverified origins
Oyster List climate data - Climate origins are unverified. Available methods include historical APIs and AI estimates; stored rows do not identify the original dataset, reference period, or model for each value. Treat these summaries as estimates until independently verified. Record updated 2026-03-22.
Oyster List city price estimates - Price origins are unverified. Available generation methods include AI estimates; stored records do not identify a survey, observation period, or model for each price. Record updated 2026-01-14.
Oyster List AI-assisted estimates - Safety, lifestyle, income, and practical scores include model-assisted estimates. Stored records do not identify supporting observations for each score. Model-reported confidence: 60/100; this is not a measured accuracy score. Model: derived+gpt-4.1. Record updated 2026-03-26.