Home » Sierra (CA) Zip Codes: United StatesSierra (CA) Zip Codes: United States Alleghany 95910 Calpine 96124 Downieville 95936 Goodyears Bar 95944 Loyalton 96118 Sierra City 96125 Sierraville 96126 Related Postcodes Siskiyou (CA) Zip Codes: United States Tuolumne (CA) Zip Codes: United States Lancaster (CA) Zip Codes: United States Yolo (CA) Zip Codes: United States Modoc (CA) Zip Codes: United States Napa (CA) Zip Codes: United States Mission Viejo (CA) Zip Codes: United States Mendocino (CA) Zip Codes: United States Stanislaus (CA) Zip Codes: United States Solano (CA) Zip Codes: United States