| Name | Population | Altitude | Latitude | Longitude | 
Jackson : | 
 | 1 261 m | 42°38'2.0" N | 113°34'12.0" W | 
Jacques : | 
 | 426 m | 46°22'18.1" N | 116°43'33.6" W | 
James Place : | 
 | 1 555 m | 42°16'36.8" N | 115°46'44.4" W | 
Jaype : | 
 | 1 020 m | 46°31'49.1" N | 115°49'44.4" W | 
Jenkins Will : | 
 | 1 649 m | 44°4'36.1" N | 111°57'36.0" W | 
Jenness : | 
 | 792 m | 43°49'55.9" N | 116°37'26.4" W | 
Jensen : | 
 | 1 585 m | 43°44'34.1" N | 111°44'45.6" W | 
Jerome (Jerome) : | 8 287 | 1 137 m | 42°43'27.1" N | 114°31'4.8" W | 
Jim Moore Place : | 
 | 751 m | 45°29'11.0" N | 115°20'16.8" W | 
Joel : | 
 | 792 m | 46°42'38.2" N | 116°52'37.2" W | 
Johnson : | 
 | 974 m | 46°25'36.8" N | 115°54'57.6" W | 
Johnsons Mill : | 
 | 974 m | 46°25'37.9" N | 115°55'1.2" W | 
Jolley : | 
 | 1 490 m | 43°50'31.9" N | 111°46'37.2" W | 
Jonathan : | 
 | 655 m | 44°16'3.0" N | 117°3'7.2" W | 
Jones Crossing : | 
 | 1 500 m | 44°5'12.8" N | 112°13'8.4" W | 
Joseph : | 
 | 1 341 m | 45°47'49.9" N | 116°28'37.2" W | 
Josephson : | 
 | 750 m | 43°44'56.0" N | 116°38'13.2" W | 
Judge Town : | 
 | 975 m | 46°28'32.2" N | 115°47'45.6" W | 
Judkins : | 
 | 1 857 m | 43°55'18.8" N | 111°8'56.4" W | 
Juliaetta (Juliaetta) : | 583 | 366 m | 46°34'44.0" N | 116°42'18.0" W | 
Junction : | 
 | 1 821 m | 44°42'2.9" N | 113°22'12.0" W | 
Juniper : | 
 | 1 539 m | 42°9'11.9" N | 112°58'8.4" W | 
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