Reagan County is among the top 10 counties in the United States with the most land currently for sale. Reagan County ranks 177th in the state for the total number of acres of land currently advertised for sale. Reagan County is Texas 's 44th largest county (1,176 square miles). Reagan County is in the West Texas region of the state. Among cities in Reagan County with farms, ranches and other land for sale, Big Lake featured the most land for sale. Economically speaking, Reagan County's is largely dependent on mining and mineral extraction-related businesses and services.