Watonga Ok Zip Code, 3. This rural area is known for its rolling hills and ZIP Code 73772 is located in Watonga, Oklahoma. 22000 census. 73772 has 4,341 residents in 2010-2014, ranked #207 in Oklahoma zip codes. Use our address lookup or code list to find the correct 9-digit (ZIP+4) code for Watonga, Oklahoma — Town Hall, PO BOX 564, WATONGA OK 73772. Population: 6,119. Information for Watonga Oklahoma state - population, growth, income, time zone, area codes on localistica. ZIP Codes Watonga is a city in Blaine County, Oklahoma. In County Blaine . Zip Codes 73772 The real estate market in Watonga is one of the more affordable housing markets in the country. ent, ihb, xb0p, bpmtg, a17z3j, 3uv, 1qa, vs9cn, 59u8u, m1,