In this study, Salmonella prevalence, serovar distribution and risk factors for shedding were investigated in breeding, nursery, and grow-finish pigs on 10 farms in western Canada, purposely selected based on their anticipated Salmonella-status. Overall, 40711143 (36%) of samples were Salmonella positive; within-farm prevalence ranged from 1% to 79%. Sows, nursery and grow-finish pigs accounted for 43%, 29% and 28% of positive samples, respectively. More Salmonella were detected in pooled pen than individual pig samples (P<0.001). The most common serovars were S. Derby, S. Typhimurium, var. Copenhagen, S. Pullen, S. Infantis, and S. Mbandaka. Sows shed more Salmonella than nursery or grow-finisher pigs (OR 2.9, P<0.001). Pelleted feed (OR 8.2, P<0.001) and nose-to-nose pig contact through pens (OR 2.2, P=0.005) were associated with increased Salmonella prevalence. Significant differences in serovar distribution were detected among production phases.