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Table Data - Net County-to-County Migration Flow (5-year estimate) for Washtenaw County, MI

NOTE: To improve accessibility of data for all users, this file was converted from a text format to an html table.

Title Net County-to-County Migration Flow (5-year estimate) for Washtenaw County, MI
Series ID NETMIGNACS026161
Source U.S. Census Bureau
Release Net Migration Flows for Counties and County Equivalents in the United States
Seasonal Adjustment Not Seasonally Adjusted
Frequency Annual
Units Persons
Date Range 2009-01-01 to 2020-01-01
Last Updated 2023-04-03 2:26 PM CDT
Notes The American Community Survey (ACS) and the Puerto Rico Community Survey (PRCS) ask respondents age 1 year and over whether they lived in the same residence 1 year ago. For people who lived in a different residence, the location of their previous residence is collected.

ACS uses a series of monthly samples to produce estimates. The 5-year dataset is used for the county-to-county migration flows since many counties have a population less than 20,000. 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.
2009-01-01 10405
2010-01-01 8881
2011-01-01 5596
2012-01-01 5447
2013-01-01 4453
2014-01-01 4610
2015-01-01 5169
2016-01-01 4969
2017-01-01 5441
2018-01-01 5801
2019-01-01 5668
2020-01-01 5281

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