Decatur, IL
2025 and 2035 projected population
Ever wonder how many people live in Decatur, IL and how fast that number changes?
Aterio data team has developed an AI enhanced model that helps organizations understand the forecasted growth of population in Decatur, IL for years 2025 through 2035.
Population Growth Rate (Year over Year)
Last update at Tue Jun 30 2026
Zip code level csv report on population forecast and economic development in Decatur, IL
Our team has created a comprehensive report on population forecast and economic development by zip code using our proprietary AI models.
Top 25 most populated zip codes in Decatur, IL
Our model provides a detailed 2025 through 2035 projected population growth for every zip code in Decatur, IL.
U.S. Zip code | 2020 census | 2025 population | 2030 population | Open |
|---|---|---|---|---|
| 62521 | 34,716 | 31,767 | 30,755 | View full zip code report, 62521 |
| 62526 | 30,627 | 30,433 | 29,184 | View full zip code report, 62526 |
| 62522 | 15,256 | 14,760 | 14,261 | View full zip code report, 62522 |
| 62523 | 1,183 | 777 | 717 | View full zip code report, 62523 |
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