 As the railroads came through the county, however, they bypassed Tascosa; several new towns and farms sprang up along the rail lines, and by 1915 Tascosa had a courthouse and almost no residents; the county seat was moved to Vega that year.Oldham County is primarily ranch and farm land, with many thousands of acres planted in wheat, the major crop.The county also has some petroleum production and large wind farms.