No Congressional Funds for Sanctuary Cities Act This bill prohibits federal funds from being used as congressionally directed spending (i.e., an earmark) for jurisdictions that withhold information about citizenship or immigration status or do not cooperate with immigration detainers. Specifically, such funds are denied to any jurisdiction that has a law, policy, or practice that prohibits or restricts any government entity from maintaining, sending, or receiving information regarding the citizenship or immigration status of any individual; exchanging information regarding an individual's citizenship or immigration status with a federal, state, or local government entity; complying with a valid immigration detainer from the Department of Homeland Security (DHS); or notifying DHS about an individual's release from custody. The funding restriction does not apply to a law, policy, or practice that only applies to an individual who comes forward as a victim of or a witness to a criminal offense. This prohibition begins in FY2026.