The historiography of the twentieth-century refugee typically unfolds as a tale of national displacement followed by international surrogate protection. This article challenges that narrative by reframing the modern refugee as an emerging category of statistics and demography. Focusing on the world’s first international refugee survey, which was led by former British colonial administrator John Hope Simpson in 1937–39, the article situates the attempt to count and classify refugees across borders within scientific debates on global population control and white resettlement. While refugees’ mobility initially eluded established parameters of national demographic measurement, Hope Simpson drew on precedents of census work and migration schemes within the British Empire to counter their unpredictability. Revealing how the tenet of colonial demography shaped mid-century views on the ‘refugee problem’, the article broadens the space of refugee history beyond nation states and international institutions and emphasizes the relevance of statistics in turning refugees into a global post-war category.