Connecticut (CT) County Name Changes - addressbroker - demographics_library - geostan_1 - centrusdesktop - geographicdeterminationlibrary - spatial_geostan

Connecticut state changed their county names and county boundaries after the US 2020 Census. GeoStan now returns the new Connecticut county names and county FIPS. The Census block IDs are consistent with the 2020 Census.

The Census block ID is a 15-character number in the format:

2-digit state FIPS
3-digit county FIPS
6-digit Census tract
4-digit Census block

The Census block ID, county FIPS and county name used to all be derived from the same value, the Census block ID. GeoStan still returns the same 2020 Census block ID, but now it returns the new county FIPS and county name.

In GeoStan versions 2024.02 and later, and with data vintage April 2024 and later, GeoStan will return the following:

C API enum	Description	What value is returned
GS_BLOCK	Census 2020 15-character block ID	UNCHANGED Census 2020 block ID
GS_BLOCK_LEFT GS_BLOCK_LEFT2	Census 2020 15-character block ID from the left side of the segment	UNCHANGED Census 2020 block ID
GS_BLOCK_RIGHT GS_BLOCK_RIGHT2	Census 2020 15-character block ID from the right side of the segment	UNCHANGED Census 2020 block ID
GS_COUNTY_NAME GS_COUNTY_NAME2	County name	NEW CT county name
GS_COUNTY GS_COUNTY2 GS_COUNTY_FIPS	County FIPS	NEW CT county FIPS

This feature is backward compatible, so this change will not break your system. However, if you are using older software or data, you may not get the values you want or expect.

CBSA/CSA values are based on the applicable Office of Management and Budget (OMB) Bulletin:

OMB Bulletin No. 23-01 (OMB 23-01), published July 21, 2023: https://www.whitehouse.gov/wp-content/uploads/2023/07/OMB-Bulletin-23-01.pdf
OMB Bulletin No. 20-01 (OMB 20-01), published March 6, 2020: https://www.whitehouse.gov/wp-content/uploads/2020/03/Bulletin-20-01.pdf

GeoStan version	Data vintage	CT county block ID	CT county FIPS and name	CBSA/CSA values
<2024.02 or <= 34	<= March 2024	Census 2020 values	Census 2020 values	OMB 20-01 (or earlier) values
<2024.02 or <= 34	>= April 2024	Census 2020 values	Census 2020 values	Blank for Connecticut; new OMB 23-01 values for all other states
>=2024.02	<= March 2024	Census 2020 values	Census 2020 values	OMB 20-01 (or earlier) values
>=2024.02	>= April 2024	Census 2020 values	New values	New values from OMB 23-01

Example

For example, for input:

210 CAPITOL AVE
HARTFORD, CT 06106

Function/Procedure	GeoStan < 2024.02 Data < April 2024	GeoStan < 2024.02 Data >= April 2024	GeoStan >= 2024.02 Data < April 2024	GeoStan >= 2024.02 Data >= April 2024
GS_BLOCK	Census 2020 value: `090035021002016`	Census 2020 value: `090035021002016`	Census 2020 value: `090035021002016`	Census 2020 value: `090035021002016`
GS_BLOCK_LEFT GS_BLOCK_RIGHT (left/right can flip month to month)	Census 2020 value: `090035021002016 090035030002000`	Census 2020 value: `090035021002016 090035030002000`	Census 2020 value: `090035021002016 090035030002000`	Census 2020: value `090035021002016 090035030002000`
GS_COUNTY_NAME	Census 2020 value: `HARTFORD COUNTY`	Census 2020 value: `HARTFORD COUNTY`	Census 2020 value: `HARTFORD COUNTY`	New value: `CAPITOL PLANNING REGION`
GS_COUNTY/GS_COUNTY_FIPS	Census 2020 value: `09003`	Census 2020 value: `09003`	Census 2020 value: `09003`	New value: `09110`
GS_CSA_NUMBER	OMB 20-01 value: `278`	Blank for Connecticut; new OMB 23-01 value for all other states	OMB 20-01 value: `278`	New value from OMB 23-01: `405`
GS_CSA_NAME	OMB 20-01 value: `HARTFORD-EAST HARTFORD, CT COMBINED STATISTICAL AREA`	Blank for Connecticut; new OMB 23-01 value for all other states	OMB 20-01 value: `HARTFORD-EAST HARTFORD, CT COMBINED STATISTICAL AREA`	New value from OMB 23-01: `NEW HAVEN-HARTFORD-WATERBURY, CT COMBINED STATISTICAL AREA`
GS_CBSA_NUMBER	OMB 20-01 value: `25540`	Blank for Connecticut; new OMB 23-01 value for all other states	OMB 20-01 value: `25540`	New value from OMB 23-01: `25540`
GS_CBSA_NAME	OMB 20-01 value: `HARTFORD-EAST HARTFORD-MIDDLETOWN, CT METROPOLITAN STATISTICAL AREA`	Blank for Connecticut; new OMB 23-01 value for all other states	OMB 20-01 value: `HARTFORD-EAST HARTFORD-MIDDLETOWN, CT METROPOLITAN STATISTICAL AREA`	New value from OMB 23-01: `HARTFORD-WEST HARTFORD-EAST HARTFORD, CT METROPOLITAN STATISTICAL AREA`
GS_CBSA_DIVISION_NUMBER	OMB 20-01 value: blank	Blank for Connecticut; new OMB 23-01 value for all other states	OMB 20-01 value: blank	New value from OMB 23-01: blank
GS_CBSA_DIVISION_NAME	OMB 20-01 value: blank	Blank for Connecticut; new OMB 23-01 value for all other states	OMB 20-01 value: blank	New value from OMB 23-01: blank
GS_METRO_FLAG	OMB 20-01 value: `Y`	Blank for Connecticut; new OMB 23-01 value for all other states	OMB 20-01 value: `Y`	New value from OMB 23-01: `Y`

Connecticut (CT) County Name Changes - addressbroker - demographics_library - geostan_1 - centrusdesktop - geographicdeterminationlibrary - spatial_geostan - Latest

GeoStan Geocoding Suite Release Notes

Example