Texas Civil Practice and Remedies Code - CIV PRAC & REM § 51.001. Appeal From Justice Court to County or District Court

(a) In a case tried in justice court in which the judgment or amount in controversy exceeds $250, exclusive of costs, or in which the appeal is expressly provided by law, a party to a final judgment may appeal to the county court.

(b) In a county in which the civil jurisdiction of the county court has been transferred to the district court, a party to a final judgment in a case covered by this section may appeal to the district court.