Irwindale is a city in the San Gabriel Valley, in Los Angeles County, California. The population was 1,472 at the 2020 census, 1,422 at th…Irwindale is a city in the San Gabriel Valley, in Los Angeles County, California. The population was 1,472 at the 2020 census, 1,422 at the 2010 census. The ZIP Codes serving the area are 91010, which is shared with Duarte, 91702, which is shared with Azusa, and 91706, which is shared with Baldwin Park.
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