Housing affordability and eviction are intertwined, yet much remains unknown about how policy responses to increase affordable housing affect the local dynamics of eviction. This article establishes a framework for understanding how supply-side housing subsidy programs in the United States may impact the incidence of eviction filing. We apply this novel framework in a descriptive analysis of 9 years of eviction filing in Philadelphia, Pennsylvania. Overall, we find theoretical and practical support for the hypothesis that tenants in subsidized multifamily housing are less vulnerable to eviction than tenants in similar unsubsidized properties, but we find those protections vary between subsidy programs. Namely, we find public housing and project-based rental assistance properties are associated with decreases in the incidence of eviction filing, whereas the findings for Low-Income Housing Tax Credit properties are inconclusive. We cannot treat subsidized housing programs as a universal solution to eviction, but both theory and our analysis suggest it is an important tool for lowering eviction and eviction filing rates.