(a) Each commissioners court by order shall divide all the territory of the county into county election precincts in accordance with this subchapter. The precincts must be compact and contiguous.
(b) In a county with a population of more than 175,000, in establishing a county election precinct, the commissioners court shall consider the availability of buildings to use as polling places so that a voter of the precinct will not have to travel more than 25 miles from the voter's residence to reach the polling place for the precinct.
Official text of the Texas Election Code as published by the Texas Legislative Council.