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Numerous studies have reported injury risks among farmers. Few have provided detailed information related to off-farm paid work practices and pesticide exposures in relation to the risk of farm work-related injuries. This study provides estimates of the risk of injury associated with these exposures in a population-based survey of Colorado male resident farm operators. Significantly associated with the risk of farm workrelated injuries were the number of days of off-farm employment (50-149 days) (odds ratio 3.25, 95% confidence interval 1.40, 7.53) and having a primary cash crop of large animals including beef, dairy, and feedlot operations (odds ratio 4.63, 95% confidence interval 1.01, 21.25). Organophosphate use and carbamate use on the farm in the previous 12 months were associated with injury but were not significantly associated when considered in a logistic regression model including age, cash crop, and the workrelated variables listed above. However, in the logistic regression analysis, the risk of exposure to the neurotoxic carbamate chemicals was greater (odds ratio 2.03, 95% confidence interval 0.59, 6.94) among injured farm operators than in the univariate analysis (odds ratio 1.47, 95% confidence interval 0.35, 4.60).