Oldham County is among the top 10 counties in the U.S. with the most land currently for sale. Oldham County ranks 177th out of 254 counties in the Lone Star State for the combined amount of land currently advertised for sale. Oldham County is the 23rd biggest county (1,501 square miles) in Texas. Oldham County is in the Texas Panhandle region of Texas. Adrian and Vega featured the most land for sale. Agriculture and farming drives the Oldham County economy, with 159 farms recorded in the county during the U.S. Census in 2012. Farming activities in Oldham County generate annual revenues of $6 million, the majority of which comes from livestock products.