Siskiyou County (California) chart of communities by population (2010 census)

† county seat

Reference 1: Population (2010 Census).

Reference 2: † Yreka, Mount Shasta, Weed, Dunsmuir, Montague, Happy Camp, McCloud, Tulelake, Dorris, Fort Jones, Etna, Karuk Reservation[35], Grenada, Hornbrook, Greenview, Quartz Valley Reservation[36], Macdoel, Carrick, Mount Hebron, Gazelle, Edgewood and Tennant.

Source: http://en.wikipedia.org/wiki/Siskiyou_County,_California