To support the Government of Nepal with the 2021 Census, UNFPA collaborated with likeminded partners – the British Embassy Kathmandu and the Swiss Agency for Development and Cooperation – with a common goal of improving the socioeconomic well-being of Nepal’s people in an inclusive and accountable federal state through support to the 2021 Census of Nepal. This knowledge brief outlines the components and benefits of the collaboration, challenges, lessons learned and achievements of this exercise - from start to finish.