# Population — Illinois

Population — Illinois was 12,719,141 persons in 2025, up 0.1% from 2024.
That is the highest reading since 2020.
Over the past ten years it has ranged from 12,609,577 persons (2022) to 12,963,110 persons (2015), averaging 12,793,789 persons.

- Source agency: U.S. Bureau of Economic Analysis (Regional Economic Accounts)
- Makrognosis code: `US-IL.POP.A.NSA`
- Frequency: annual
- Units: persons
- Coverage: 1929-01-01 to 2025-01-01 (97 observations)
- Page: https://makrognosis.robomacro.com/data/united-states/population-illinois

## Recent data

| Period | Value |
|---|---:|
| 2025 | 12,719,141 persons |
| 2024 | 12,703,033 persons |
| 2023 | 12,633,389 persons |
| 2022 | 12,609,577 persons |
| 2021 | 12,703,354 persons |
| 2020 | 12,795,348 persons |
| 2019 | 12,849,440 persons |
| 2018 | 12,887,397 persons |
| 2017 | 12,922,894 persons |
| 2016 | 12,944,999 persons |
| 2015 | 12,963,110 persons |
| 2014 | 12,968,905 persons |
| 2013 | 12,959,880 persons |
| 2012 | 12,927,420 persons |
| 2011 | 12,892,409 persons |
| 2010 | 12,845,460 persons |
| 2009 | 12,796,778 persons |
| 2008 | 12,747,038 persons |
| 2007 | 12,695,866 persons |
| 2006 | 12,643,955 persons |
| 2005 | 12,609,903 persons |
| 2004 | 12,589,773 persons |
| 2003 | 12,556,006 persons |
| 2002 | 12,525,556 persons |

## API

```
curl -H "X-API-Key: $MAKROGNOSIS_KEY" \
  "https://makrognosis.robomacro.com/v1/series/US-IL.POP.A.NSA"

# Python
import requests
r = requests.get("https://makrognosis.robomacro.com/v1/series/US-IL.POP.A.NSA",
                 headers={"X-API-Key": KEY})
obs = r.json()["observations"]
```