Where does this data come from?

Name: Population — Clay, IL (persons)
Creator: U.S. Bureau of Economic Analysis (Regional Economic Accounts)

It is collected directly from U.S. Bureau of Economic Analysis (Regional Economic Accounts) and is available through the Makrognosis API under the code US-IL-17025.POP.A.NSA.

Population — Clay, IL (persons)

AnnualNot seasonally adjustedCode US-IL-17025.POP.A.NSA

Latest12,821 persons2024

Previous12,945 persons2023

Year ago12,945 persons2023

Population — Clay, IL (persons) was 12,821 persons in 2024, down 1.0% from 2023.

That is the lowest reading since the series began in 1969.

Over the past ten years it has ranged from 12,821 persons (2024) to 13,513 persons (2014), averaging 13,253 persons.

Population — Clay, IL (persons) (persons), 1969 – 2024. Source: U.S. Bureau of Economic Analysis (Regional Economic Accounts).

Showing the full history (downsampled for display). Open the interactive chart to zoom and switch transforms.

Recent data

Period	Value
2024	12,821 persons
2023	12,945 persons
2022	13,053 persons
2021	13,166 persons
2020	13,273 persons
2019	13,334 persons
2018	13,401 persons
2017	13,382 persons
2016	13,415 persons
2015	13,484 persons
2014	13,513 persons
2013	13,606 persons
2012	13,748 persons
2011	13,742 persons
2010	13,826 persons
2009	13,826 persons
2008	13,971 persons
2007	13,975 persons
2006	14,061 persons
2005	14,134 persons
2004	14,142 persons
2003	14,194 persons
2002	14,228 persons
2001	14,260 persons

Last 24 observations. The full history (56 observations) is available through the API.

Get Population — Clay, IL (persons) in your code or spreadsheet

One guessable code, agency-direct, updated on release. Free tier available.

curl -H "X-API-Key: $MAKROGNOSIS_KEY" \
  "https://makrognosis.robomacro.com/v1/series/US-IL-17025.POP.A.NSA"

# Python
import requests
r = requests.get("https://makrognosis.robomacro.com/v1/series/US-IL-17025.POP.A.NSA",
                 headers={"X-API-Key": KEY})
obs = r.json()["observations"]

Get a free API key → · API docs

About this series

Latest observation	2024
First observation	1969
Observations	56
Frequency	Annual
Units	persons
Adjustment	Not seasonally adjusted
10-year high	13,513 persons (2014)
10-year low	12,821 persons (2024)
10-year average	13,253 persons
Source agency	U.S. Bureau of Economic Analysis (Regional Economic Accounts)
Makrognosis code	US-IL-17025.POP.A.NSA

This series is a labelled reference series (an official figure republished by an aggregator) rather than a first print from the agency itself.

Other United States indicators

Unemployment Rate: Clay County, IL (U)Employment: Clay County, IL (U)Labor Force: Clay County, IL (U)Per-Capita Personal Income — Clay, IL (USD)Personal Income — Clay, IL (USD thousands)Unemployment: Clay County, IL (U)

National figure

United States Population, midperiod

FAQ

Where does this data come from?: It is collected directly from U.S. Bureau of Economic Analysis (Regional Economic Accounts) and is available through the Makrognosis API under the code US-IL-17025.POP.A.NSA.

Last updated 2026-07-12. Source: U.S. Bureau of Economic Analysis (Regional Economic Accounts). Original title: “Population — Clay, IL (persons)”.