There are 7 US Post Offices in Alfalfa County serving a total of 5,312 residents equating to 759 residents per post office. It's estimated that approximately 8,479 packages are handled across the 7 county post offices annually. Alfalfa County is a county located in the U.S. state of Oklahoma. As of the 2010 census, the population was 5,642. The county seat is Cherokee. Alfalfa County was formed at statehood in 1907 from Woods County. The county is named after William H. \"Alfalfa Bill\" Murray, the president of the Oklahoma Constitutional Convention and ninth governor of Oklahoma, who was instrumental in carving out the county from the original much larger Woods county.