Fanning, Kansas  Fanning is an unincorporated community in Doniphan County, Kansas, United States. Fanning is located along K-7 northwest of Troy. Fanning had its start in the year 1870 by the building of the Burlington and Missouri River Railroad through that territory. A post office was opened in Fanning in December, 1870, and remained in operation until it was discontinued in July, 1933.