Logan County

Ceir sawl sir o'r enw Logan County yn yr Unol Daleithiau, gan gynnwys:	

 Logan County, Arkansas 
 Logan County, Colorado 
 Logan County, Idaho (1889–1895)
 Logan County, Illinois 
 Logan County, Kansas 
 Logan County, Kentucky 
 Logan County, Nebraska 
 Logan County, Gogledd Dakota 
 Logan County, Ohio 
 Logan County, Oklahoma 
 Logan County, Gorllewin Virginia