Balko, OK

ZIP code 73931 encompasses the town of Boise City in Cimarron County, Oklahoma. The area is known for being the only city in the United States to be bombed during World War II. Important landmarks here include the Cimarron Heritage Center, a museum showcasing the history of the region, and the historic Santa Fe Trail marker. With a small population, the town offers a unique glimpse into the history and culture of the American Southwest.