These migration flows are derived from the household and group quarter locations sampled in the American Community Survey (ACS) and the responses to the migration questions on the questionnaire.
They are period estimates that measure where people lived when surveyed (current residence) and where they lived 1 year prior (residence 1 year ago). The data are collected continuously over a 5-year period to provide a large enough sample for estimates in smaller geographies. The flow estimates resemble the annual number of movers between counties for the 5-year period data was collected.
The flow files produced are:
For selected data sets early in the series, the flow files have been crossed by social and demographic characteristics that vary by year. A characteristic will not be reused in overlapping 5-year ACS data sets. For instance, age was one of the characteristics for 2006-2010. Age flows will not be produced again until the 2011-2015 flows. These flows with characteristics are subject to suppression for disclosure avoidance purposes. County and county/MCD flows are suppressed if they consist of only one or two people in different households or group quarters. Complimentary suppression is used for the MSA flows.
Characteristics are not crossed with one another, and their universe may vary from one another and the universe for no characteristics, population 1 year and over.
Characteristics are included for the following years:
The flow statistics are:
For selected years, there are supplemental statistics files that provide summary statistics by mover type (e.g., nonmovers, movers to a state, movers from abroad). These flows crossed by characteristics are also subject to suppression. For the estimates based upon the population of the county 1 year ago, there must be at least 50 unweighted cases for the estimates to be shown.
The 2018-2022 ACS 5-year state-to-county migration flows suppressed estimates of migration within, to, and from the state of Connecticut to another state or Puerto Rico. Data users should exercise caution when comparing 2018-2022 5-year state-to-county migration flows estimates to those from prior data years. For more information, visit: www.census.gov/programs-surveys/acs/technical-documentation/errata/143.html.
For more information, please visit the Migration/Geographic Mobility page.
(Universe: Population 16 years and over)
01 = In labor force, employed civilian
02 = In labor force, unemployed
03 = In labor force, in Armed Forces
04 = Not in labor force
(Universe: Population 16 years and over who last worked within the past 5 years)
01 = Management, business, science, and arts occupations
02 = Service occupations
03 = Sales and office occupations
04 = Natural resources, construction, and maintenance occupations
05 = Production, transportation, and material moving occupations
06 = Military specific occupations
(Universe: Population 16 years and over)
01 = Worked 50 to 52 weeks in the past 12 months and usually worked 35 or more hours per week
02 = Worked 50 to 52 weeks in the past 12 months and usually worked less than 35 hours per week
03 = Worked 1 to 49 weeks in the past 12 months and usually worked 35 or more hours per week
04 = Worked 1 to 49 weeks in the past 12 months and usually worked less than 35 hours per week
05 = Last worked 1 to 5 years ago
06 = Last worked over 5 years ago or never worked