Local knowledge is an important form of evidence that can help humanitarian organizations demonstrate their relevance and cost-effectiveness. [1] Integrating local knowledge into evidence gathering can provide local ownership over projects, save time and costs through community adaptation, and ensure accountability to affected populations. [2] Evidence demands in the sector are high, but local knowledge from affected communities can help meet these demands through rich problem analysis and feedback directly from those communities on whether projects are meeting their needs and expectations. [3] Challenges remain in accurately integrating local contexts and perspectives into data collection and analysis, but developing systems to do so can help humanitarian organizations demonstrate evidence of their work in a complex world.