Texas Government Code - GOV'T § 25.0014. Qualifications of Judge

(1) be at least 25 years of age;

(2) be a United States citizen and have resided in the county for at least two years before election or appointment; and

(3) be a licensed attorney in this state who has practiced law or served as a judge of a court in this state, or both combined, for the four years preceding election or appointment, unless otherwise provided for by law.