Dimmitt, Texas
Dimmitt is a city in Castro County on the flat, high tableland of the Llano Estacado in the Panhandle, about 54 miles southwest of Amarillo. The surrounding plains are given over to large-scale irrigated agriculture, with grain crops, cotton, and cattle feeding operations spread across the level farmland. It functions as a trade and service center for this intensively farmed corner of the High Plains.
Place essentials
Official Census snapshot- Census place type
- City
- July 2025 population
- 4,069
- Change from 2020 base
- -1.7%
- Land area
- 3.1 sq. mi.
- County footprint
- Castro County
Place type, county footprint, and land area use the Census Bureau's January 1, 2025 geography. Population uses Vintage 2025 estimates through July 1, 2025; change compares that estimate with the April 1, 2020 estimates base. Geography file | Population file
Property here runs through the appraisal district and tax office for Castro County. The homestead exemption, appraisal cap, protests, and any MUD, PID, or special districts all sit at the parcel level.
Official routes
Use the office for the parcel address; a mailing city is not always the governing city.
County context
What to know around Dimmitt
County lines carry much of the property, land, water, and outdoors context around Dimmitt.
County History
Castro County was named for a French-born empresario, not a rancher
Castro County takes its name from Henri Castro, a 19th-century diplomat and land agent for the Republic of Texas.
Property Tax
Who handles your property taxes in Castro County
Two separate offices handle property appraisals and tax collection in Castro County, and knowing the difference saves confusion.
Groundwater
The Ogallala Aquifer is Castro County's water source — and it is declining
Nearly all water in Castro County comes from the Ogallala Aquifer, which has been dropping steadily for decades.
Nearby
Places near Dimmitt
Nearby counties
Local notes for nearby counties
Next steps for Dimmitt
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