Texas/Regions

Due to Texas' size and complexity, some data consumers find it necessary to subdivide the state into smaller regions, but the state's 254 counties are too numerous and granular for some use cases. Data consumers can group counties by region for convenient processing. These regions should not be mapped in OSM, because there are multiple schemes for dividing Texas into regions that don't quite line up with each other.

Scheme	Maintainer	Number of regions	Largest region (counties)	Smallest region (counties)
TxDOT districts	Texas Department of Transportation	25	17	6
Uniform state service regions	Texas Department of Housing and Community Affairs	13	41	6
Public health regions	Texas Department of Health State Services	11	30	6
countymapsoftexas.com regions	countymapsoftexas.com	9	34	16
Company areas	Texas Rangers (Texas Department of Public Safety)	6	71	35
North Texas, East Texas, Central Texas, South Texas, West Texas, Panhandle	N/A	6
North Texas, East Texas, Central Texas, South Texas, West Texas	N/A	5