City comparison
Decatur, AL is about 375 miles (600 km) from Decatur, IL in a straight line. By road, the drive is roughly 475 miles, or about 8 h behind the wheel at highway speeds.
Driving distance is a rough estimate (great-circle × 1.25); driving time assumes a 60 mph blended average. Real trips run 10–20% longer with stops.
A direct flight from Decatur, AL to Decatur, IL takes about 46 min, covering roughly 375 miles in a straight line. Connecting itineraries with a layover typically add 1–3 hours.
Block-to-block estimate at ~500 mph cruise, including taxi, climb, and descent — what an airline would publish, not pure airborne time.
Decatur has a population of 70,975, vs 57,525 in Decatur — about 1.2× larger by population. By land area, Decatur covers about 55 sq mi vs 44 sq mi for Decatur.
Population from US Census ACS. Land area from the Census Gazetteer (city proper, excluding inland water).
Cost indices by category, with the US city average (100) marked.
Index: 100 = US city average. Lower is more affordable.
Side-by-side costs, salaries, and sub-category indices.
| Metric | Decatur | Decatur | Difference |
|---|---|---|---|
| Median rent | $801/mo | $770/mo | 4.0% higher in Decatur |
| Median home value | $170,000 | $96,800 | 75.6% higher in Decatur |
| Median household income | $55,164 | $49,039 | 12.5% higher in Decatur |
| Groceries index | 96.6 | 93.9 | 2.9% higher in Decatur |
| Utilities index | 85.7 | 91.2 | 6.4% higher in Decatur |
| Transportation index | 97.0 | 99.3 | 2.4% higher in Decatur |
| Healthcare index | 96.5 | 99.5 | 3.1% higher in Decatur |
How much you'd need to earn in the other city to keep the same standard of living.
If you earn $100,000 in Decatur, you'd need $100,050 in Decatur to maintain your standard of living.
Climate, safety, and demographics side by side.
Decatur and Decatur have nearly identical overall cost-of-living indices. If you earn $80,000 in Decatur, you'd need about $80,040 in Decatur to keep the same standard of living.