La Tina Ranch is a census-designated place (CDP) in Cameron County, in the U.S. state of Texas. As of the 2020 census, La Tina Ranch had a population of 687. Prior to the 2010 census, the community was part of the Arroyo Gardens-La Tina Ranch CDP. It is part of the Brownsville–Harlingen Metropolitan Statistical Area.
The first population estimates were available in 1976, when the community had 61 dwellings and 319 residents. At that time, the area had no public water supply.
La Tina Ranch is in north-central Cameron County, east of Harlingen and north of Brownsville. It is bordered on the west by Arroyo Gardens.
According to the United States Census Bureau, the CDP has a total area of , of which is land and , or 0.69%, is water.
La Tina Ranch first appeared as a census designated place in the 2010 U.S. census after the Arroyo Gardens-La Tina Ranch CDP was split into the La Tina Ranch and Arroyo Gardens CDPs.