Hours Of Operations Grainger California Ontario 91761 Grainger Hours of Operation and Location in Ontario, CA 91761 4.2 - 195 votes 1550 S Milliken Ave, Ste A, Ontario, CA 91761 (909) 623-0746 Get Directions Grainger Hours Category: Home & Garden Hours Hours may vary due to season or holiday reasons. For specific hours, please contact store directly. Map Explore OntarioView More Apparel Sam's ClubMarshallsRoss Dress for LessDd's DISCOUNTSBurlington Coat Factory Sports TargetSports AuthorityNew BalanceNikeSport Chalet Jewelry Sam's ClubMarshallsBurlington Coat FactorySaks Fifth AvenueKohl's Outlet Recommend For You Movado Disney Store ADT Build-A Bear Workshop American Standard At Home Bally Black & Decker Call It Spring Champion