Town Hall Address 3301 Carmen Ave. Rancho Viejo, TX 78575 United States- Cameron County Website https://www.ranchoviejotexas.com Zoning 956-350-4093 3301 Carmen Ave. Rancho Viejo, TX 78575 United States Town Clerk 956-350-4093 3301 Carmen Ave. Rancho Viejo, TX 78575 United States Tax Collector 956-350-4093 3301 Carmen Ave. Rancho Viejo, TX 78575 United States Town Hall Hours Monday - Friday: 8:00 AM - 5:00 PM County Cameron