Skip to main content

Home > Releases > County Population Estimates By Race And Ethnicity > Population Estimate, Total (5-year estimate) in Rock County, WI

Population Estimate, Total (5-year estimate) in Rock County, WI (B03002001E055105)

Observations

2024: 164,350
Updated: Jan 29, 2026 3:31 PM CST
2024:  164,350  
2023:  163,944  
2022:  163,817  
2021:  163,522  
2020:  162,532  

Units:

Persons,
Not Seasonally Adjusted

Frequency:

Annual

Fullscreen

Notes

Title Release Dates
Population Estimate, Total (5-year estimate) in Rock County, WI 2018-12-06 2026-01-29
 
Source    
U.S. Census Bureau 2018-12-06 2026-01-29
 
Release    
County Population Estimates By Race And Ethnicity 2018-12-06 2026-01-29
 
Units    
Persons 2018-12-06 2026-01-29
 
Frequency    
Annual 2018-12-06 2026-01-29
 
Seasonal Adjustment    
Not Seasonally Adjusted 2018-12-06 2026-01-29
 
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 (https://www.census.gov/content/dam/Census/library/publications/2018/acs/acs_general_handbook_2018.pdf) for a more thorough clarification.

2018-12-06 2026-01-29

Release Tables

Related Data and Content

Data Suggestions Based On Your Search

Content Suggestions

Related Categories

Rock County, WI Counties Wisconsin States U.S. Regional Data

Releases

More Series from County Population Estimates By Race And Ethnicity

Tags

Rock County, WI Janesville Wisconsin Estimate American Community Survey 5-Year Persons Population County or County Equivalent Census Annual Public Domain: Citation Requested United States of America Not Seasonally Adjusted