Across the country, states and localities are increasingly moving to end marijuana prohibition laws. For immigrant communities, despite the changing attitude toward marijuana-related conduct at the state level, an old conviction can still form the basis for immigration-related consequences at the federal level. Though federal legal reforms may be the only way to completely eradicate the immigration consequences of marijuana-related conduct and convictions, reforms at the state level can nevertheless help stop the arrest-to-deportation pipeline. Drawing from our experience with state and municipal efforts across the country, this resource, jointly produced by the Immigrant Legal Resource Center, the Immigrant Defense Project, and the Drug Policy Alliance, lists best practices for municipalities and states looking to decriminalize in a way that lessens the immigration-related harms of marijuana criminalization.