Federal Reserve Economic Data

Table Data - Population Estimate, Total (5-year estimate) in Cook County, IL

Title Population Estimate, Total (5-year estimate) in Cook County, IL
Series ID B03002001E017031
Source U.S. Census Bureau
Release County Population Estimates By Race And Ethnicity (Not a Press Release)
Seasonal Adjustment Not Seasonally Adjusted
Frequency Annual
Units Persons
Date Range 2009-01-01 to 2023-01-01
Last Updated 2024-12-12 1:55 PM CST
Notes Data obtained from ACS Demographic and Housing Estimates, table DP05.

Multiyear estimates from the American Community Survey (ACS) are "period" estimates derived from a data sample collected over a period of time, as opposed to "point-in-time" estimates such as those from past decennial censuses. ACS 5-year estimate includes data collected over a 60-month period. The date of the data is the end of the 5-year period. For example, a value dated 2014 represents data from 2010 to 2014. However, they do not describe any specific day, month, or year within that time period.

Multiyear estimates require some considerations that single-year estimates do not. For example, multiyear estimates released in consecutive years consist mostly of overlapping years and shared data. The 2010-2014 ACS 5-year estimates share sample data from 2011 through 2014 with the 2011-2015 ACS 5-year estimates. Because of this overlap, users should use extreme caution in making comparisons with consecutive years of multiyear estimates.

Please see "Section 3: Understanding and Using ACS Single-Year and Multiyear Estimates" on publication page 13 (file page 19) of the 2018 ACS General Handbook for a more thorough clarification.
DATE VALUE
2009-01-01 5257001
2010-01-01 5172848
2011-01-01 5182969
2012-01-01 5197677
2013-01-01 5212372
2014-01-01 5227827
2015-01-01 5236393
2016-01-01 5227575
2017-01-01 5238541
2018-01-01 5223719
2019-01-01 5198275
2020-01-01 5169517
2021-01-01 5265398
2022-01-01 5225367
2023-01-01 5185812

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