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County Demographic-Economic Characteristics & Patterns
  .. resources to create and apply insights

August 2023 .. did you know? that the largest U.S. county based on population is Los Angeles County, CA (9.7 million) .. that there are 47 counties with more than 1 million population? .. that since 2020, and among the million+ counties, Collin County, TX (Dallas metro) experienced the highest population growth rate (7.7%)? What about your counties of interest? Find out. Use the interactive table below to view, rank, sort, compare county, and county by state/metro, population and components of change since 2020.

For many counties the pandemic has impacted each component of population change: births, deaths and migration. The pandemic among other factors including climate change impact different counties in different ways. Learn more. Find out more about county demographic change projected to 2030 and 2060. See more below about annual 2010 to 2020 county intercensal estimates of population and components of change.

County/Regional Mapping & GeoStatistical Analysis using VDA Web GIS
The CountyTrends GIS project can be used with the VDA Web GIS for county/regional mapping and geospatial analysis. For example, a query (stab='TX' and popest22>1000000) is used to show all Texas counties with 2022 population 1,000,000 or more in a table sorted on 2022 population in descending order (popest22 desc). Then, the show-selected button is clicked to show selected counties in map winodw -- as shown in graohic at right. Click graphic for larger view. Step-by-step how-to instructions below.

Examining County GeoStatistical Characteristics & Patterns
Counties, and county equivalent areas such as independent cities, are the primary political subdivision of states. The relative stable geography of counties, with good national scope geographic granularity, makes these areas appealing for use in tabulating data and analyzing demographic-economic data. This section provides information on tools and data related to accessing, integrating analyzing county demographic-economic patterns and trends. .. updates ,, interactive table

Patterns of Percent Net Migration by County: 2021-2022
The following graphic shows patterns of percent net migration by county for the two-year period 7/1/20 to 6/30/22. See details below about how these data were computed. The largest ten metros (MSAs) are highlighted with bold black boundaries.

- click graphic for larger view and details.
- the above view, and interactive variants, may be viewed using the CountyTrends GIS project with the VDA Web GIS.

Join us in the weekly data analytics web sessions where CountyTrends topics are always included.

Population & Components of Change
Total population for an area can be computed as a sum of components of change:
Population (7/1/22) = Population (7/1/21)
  + Births (6/30/21 to 7/1/22)
  - Deaths (6/30/21 to 7/1/22)
  + Net International Migration (6/30/21 to 7/1/22)
  + Net Domestic Migration (6/30/21 to 7/1/22)

How & Why Counties are Changing .. goto top
The following graphic shows how a county is changing (layers for gaining or losing population) and why a county is changing (interval for mainly net migration and interval for mainly natural change) for the period 4/1/20 - 6/30/22. The largest ten metros (MSAs) are highlighted with bold black boundaries.

- click graphic for larger view and details.
- the above view, and interactive variants, may be viewed using the CountyTrends GIS project with the VDA Web GIS.

For example, the computation to determine "gaining, mainly natural change" (green) is:
(popest22-popest20)>0 and (netmig20+netmig21+netmig22)<=(natchg20+natchg21+natchg22)
.. the determination for Harris County, TX is:
(4780913-4734505)>0 and (-5261 + -26615 + 17262 )<=( 7446 + 26061 + 30117) or
(46408)>0 and ((-14614)< (63624))


- click graphic for larger view and details.

Selected County Geographic-Demographic-Economic Updates .. goto top
... scroll section
Outlook 2060: U.S. Demographic-Economic Projections to 2060
.. Annual projections 2010 to 2060
.. U.S., state, county population by single year of age, gender, race, origin
    with associated multi-sector economic projections.
.. http://proximityone.com/demographic2060.htm

04.03.23. This section extensively updated using Census Bureau county model-based population estimates.
        .. annual updates released in March 2023.


County Population & Components of Change 2020-2022 .. goto top
  Interactive table
  Click column header to sort; again to sort other direction.
  Components of change (B, D, M) for 2020 are for the 3 month period 4/1/20 through 6/30/20.
  Click ShowAll/Reset button between queries to refresh table. Usage notes below table.


Interactive Table Usage Notes
Concepts
  • 2020 component columns show value for 3 months: 4/1/20 to 7/1/20.
    .. follows format used by Census Bureau.
  • Group Quarters is not a component of change but is shown in the table.
    .. it is a population group that is a part of the total resident population.

Operations
  • Click ShowAll between queries/filters.
  • Use left-most column to select by state.
  • Find in Name button; click ShowAll button first
    .. click Find in Name button to search column 1 for text in edit box.
    .. text entered in edit box is case sensitive.
    .. partial names are okay to use.
    .. click with default value to view all rows with "Harris" (no quotes)
  • State-County FIPS Codes: http://proximityone.com/stcty.txt
  • Find in CBSA button; click ShowAll button first
    .. click Find in CBSA button to search column 4 for text in edit box.
    .. text entered in edit box must be the 5-character CBSA code.
    .. click with default value to view all rows with "26420" (no quotes)
        ... 26420 is the Houston, TX metro CBSA code
    .. how choose a different CBSA/metro:
        ... copy code from scroll list at right and paste into Find in CBSA edit box.
        ... then click Find in CBSA button.
    .. CBSA/metro codes: http://proximityone.com/metros.htm

Selected columns buttons
  • Pop - click to view population columns.
  • NetChg - click to view net change columns.
  • Births - click to view births columns.
  • Deaths - click to view deaths columns.
  • NatInc - click to view natural increase columns.
  • IntMig - click to view international migration columns.
  • DomMig - click to view domestic migration columns.
  • NetMig - click to view net migration columns.

  • Population Min & Max> button
    .. click to show only peer group counties based on values
        in min and max edit boxes.
    .. enter the minimum 2022 population in the left edit box.
    .. enter the maximum 2022 population in the right edit box.
  • Click ShowAll between queries/filters.

Items in Table
  CTYNAME   County name
  ST   USPS State abbv
  GEOID   State+County FIPS code
  METRo   CBSA code
  ESTBASE2020   4/1/2020 resident total population estimates base
  POP2020   7/1/2020 resident total population estimate
  POP2021   7/1/2021 resident total population estimate
  POP2022   7/1/2022 resident total population estimate
  NPOPCHG2020   Numeric change in resident total population 4/1/2020 to 7/1/2020
  NPOPCHG2021   Numeric change in resident total population 7/1/2020 to 7/1/2021
  NPOPCHG2022   Numeric change in resident total population 7/1/2021 to 7/1/2022
  BIRTHS2020   Births in period 4/1/2020 to 6/30/2020
  BIRTHS2021   Births in period 7/1/2020 to 6/30/2021
  BIRTHS2022   Births in period 7/1/2021 to 6/30/2022
  DEATHS2020   Deaths in period 4/1/2020 to 6/30/2020
  DEATHS2021   Deaths in period 7/1/2020 to 6/30/2021
  DEATHS2022   Deaths in period 7/1/2021 to 6/30/2022
  NATCHG2020   Natural change in period 4/1/2020 to 6/30/2020
  NATCHG2021   Natural change in period 7/1/2020 to 6/30/2021
  NATCHG2022   Natural change in period 7/1/2021 to 6/30/2022
  INTMIG2020   Net international migration in period 4/1/2020 to 6/30/2020
  INTMIG2021   Net international migration in period 7/1/2020 to 6/30/2021
  INTMIG2022   Net international migration in period 4/1/2021 to 6/30/2022
  DOMMIG2020   Net domestic migration in period 4/1/2020 to 6/30/2020
  DOMMIG2021   Net domestic migration in period 7/1/2020 to 6/30/2021
  DOMMIG2022   Net domestic migration in period 7/1/2021 to 6/30/2022
  NETMIG2020   Net migration in period 4/1/2020 to 6/30/2020
  NETMIG2021   Net migration in period 7/1/2020 to 6/30/2021
  NETMIG2022   Net migration in period 7/1/2021 to 6/30/2022
  RESIDUAL2020   Residual for period 4/1/2020 to 6/30/2020
  RESIDUAL2021   Residual for period 7/1/2020 to 6/30/2021
  RESIDUAL2022   Residual for period 7/1/2021 to 6/30/2022
  GQBASE2020   4/1/2020 Group Quarters total population estimates base
  GQ2020   7/1/2020 Group Quarters total population estimate
  GQ2021   7/1/2021 Group Quarters total population estimate
  GQ2022   7/1/2022 Group Quarters total population estimate
  RBIRTH2021   Birth rate in period 7/1/2020 to 6/30/2021
  RBIRTH2022   Birth rate in period 7/1/2021 to 6/30/2022
  RDEATH2021   Death rate in period 7/1/2020 to 6/30/2021
  RDEATH2022   Death rate in period 7/1/2021 to 6/30/2022
  RNATCHG2021   Natural change rate in period 7/1/2020 to 6/30/2021
  RNATCHG2022   Natural change rate in period 7/1/2021 to 6/30/2022
  RINTMIG2021   Net international migration rate in period 7/1/2020 to 6/30/2021
  RINTMIG2022   Net international migration rate in period 7/1/2021 to 6/30/2022
  RDOMMIG2021   Net domestic migration rate in period 7/1/2020 to 6/30/2021
  RDOMMIG2022   Net domestic migration rate in period 7/1/2021 to 6/30/2022
  RNETMIG2021   Net migration rate in period 7/1/2020 to 6/30/2021
  RNETMIG2022   Net migration rate in period 7/1/2021 to 6/30/2022

Computing Patterns of Percent Net Migration by County: 2021-2022 .. goto top
The %net migration graphic above show patterns of %net migration by county for the two-year period 7/1/20 to 6/30/22. Intervals shonw in the legend panel are based on these end points (average of two years:
(100*(NETMIG21/popest21)+100*(NETMIG22/popest22))/2 >=3 -- top interval where
NETMIG21 .. net migration during the period 6/30/20 to 7/1/21
popest21 .. population as of 7/1/21
NETMIG22 .. net migration during the period 6/30/21 to 7/1/22
popest22 .. population as of 7/1/22

County/Regional Mapping & GeoStatistical Analysis using VDA Web GIS .. goto top
From above ... The CountyTrends GIS project can be used with the VDA Web GIS for county/regional mapping and geospatial analysis.

In this example, a query (stab='TX' and popest22>1000000) is used to show all Texas counties with 2022 population 1,000,000 or more in a table sorted on 2022 population in descending order (popest22 desc). Then, click show selected to get the result shown below.


The steps to perform this application are as follows.
Using any browser (Chrome recommended) and any device (Windows desktop/laptop recommended) ...
Start VDA Web GIS .. sbout VDA Web GIS .. VDA GIS Getting Started
Select CountyTrends in the Select Project form.

When map window displays, in Legend panel at left ..
- uncheck Largest 10 Metros,
- uncheck Cty %NetMig ...
- check on Counties
Click Query/Table button, below map window, far right.
Click Select Field button below table. Then check: CTYNAME, STAB, GEOID, CBSAFP, POPEST22. Then click "Set & Close" button.
In SQL Filter edit box, key in "stab='TX' and popest22>1000000" (no double quotes)
In SORT edit box, key in "popest22 desc" (no double quotes)
Click Query button at right of SORT edit box.
.. table refreshes, with table content as shown in above graphic.
Click "Highlight all that meet query button" at right below table/
.. map window shows selected counties with cross-hatch pattern. Zoom to state so all selected counties show in map.
Done!

More .. click on a county to view its data profile.
.. the profile shows in lower left panel. Click the HTML button below the lower left panel to display an HTML page showing the attributes.

2010 to 2020 Intercensal Estimates .. goto top
New annual 2010 to 2020 county intercensal population and components of change estimates are first available in the fall 2023 ProximityOne demographic estimates and projections program. The result is a consistent time series from the 2010 Census to the 2020 Census.

The Census Bureau 2010 to 2020 Intercensal Estimates will become the official estimates for the 2010-2020 decade and are currently scheduled to become available in Fall 2024 (a year later). Those data are produced by modifying the Census Bureau Vintage 2020 estimates to account for differences between these estimates and the results of the 2020 Census. For more information on the Intercensal Estimates, please see the 2000-2010 Methodology Statement. The fall 2024 ProximityOne population estimates and projection updates will utilize these official estimates.

Support Using these Resources .. goto top
Learn more about accessing and using ACS data integrated with other data; examine characteristics and patterns for your study areas and applications. Join us in a Data Analytics Web Session. There is no fee for these one-hour Web sessions. Each informal session is focused on a specific topic. The open structure also provides for Q&A and discussion of application issues of interest to participants.

Additional Information
ProximityOne develops geographic-demographic-economic data and analytical tools and helps organizations knit together and use diverse data in a decision-making and analytical framework. We develop custom demographic/economic estimates and projections, develop geographic and geocoded address files, and assist with impact and geospatial analyses. Wide-ranging organizations use our tools (software, data, methodologies) to analyze their own data integrated with other data. Follow ProximityOne on Twitter at www.twitter.com/proximityone. Contact us (888-364-7656) with questions about data covered in this section or to discuss custom estimates, projections or analyses for your areas of interest.

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