Woodruff, KansasWoodruff is a census-designated place in Phillips County, Kansas, United States. As of the 2020 [United States census|2020 census], the population was 13.HistoryA post office was opened in Woodruff in 1885, and remained in operation until it was discontinued in 1956.Notable people Harold W. Bauer, World War II flying ace, posthumously awarded Medal of Honor Hollis Caswell, educator