Bonner-West Riverside (Salish: Nʔaycčstm, "Place of the Big Bull Trout") is a census-designated place (CDP) in Missoula County, Montana, United States. It is part of the Missoula, Montana Metropolitan Statistical Area. The population was 1,663 at the 2010 census, a decline from its population of 1,693 in 2000.
The town was named for Edward L. Bonner, president of the Missoula and Bitter Root Valley Railroad. Bonner was also a partner in Eddy, Hammond & Company, who were contracted by Northern Pacific Railroad for supplies to build their railway between the Thompson and Blackfoot rivers. Bonner was also a partner in the Montana Improvement Company, which built a sawmill in Bonner in 1886. The sawmill was purchased by the Anaconda Company in 1898.
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