This paper investigates the prevalence of coworker and supervisor incivility in the context of K-12 schools and incivility's possible link to teachers' commitment to the school and turnover intent. The data were collected via surveys from 94 middle school teachers in the United States. Results indicated that 85% of the teachers experienced coworker incivility over the past year; 71% experienced supervisor incivility. MANOVA results suggested no statistically significant differences in incivility by gender or ethnicity. Hierarchical regression results suggested that supervisor incivility was associated negatively with commitment and positively associated with turnover intent. Coworker incivility was not a significant predictor in the regression equations. Macro- and micro-level human resource strategies are offered as possible tools to lessen the likelihood of uncivil behavior.