National parliaments are crucial in ensuring the 17 Goals in the 2030 Agenda for Sustainable Development are meaningfully translated into national policies and programmes that improve citizens’ lives. Parliamentarians are responsible for making national government accountable and should therefore be strong advocates for using evaluation in policymaking. They can also help lead efforts to develop each country’s wider capacity for evaluation. This briefing discusses parliamentarians’ efforts to build national evaluation capacity and use evaluation effectively. Such tasks are not without challenges, but these, we argue, can be reframed as opportunities.