Town Hall Address 121 N. Arroyo Blvd. Rio Hondo, TX 78583 United States- Cameron County Website https://riohondo.us Town Clerk 956-748-2102 121 N. Arroyo Blvd. Rio Hondo, TX 78583 United States Tax Collector 956-748-2102 121 N. Arroyo Blvd. Rio Hondo, TX 78583 United States County Cameron