The 1921 population census in Bosnia and Herzegovina was the fifth census of the population of Bosnia and Herzegovina. On the territory of 51,200 km2 1,890,440 persons lived. The Kingdom of Serbs, Croats and Slovenes conducted a population census on 31 January 1921.

Results by religion Religion Number Percentage Number change Percentage changeSerbian Orthodox Christians 829,290 43.87% 3,872 0.38%Sunni Muslims 588,244 31.07% 23,893 1.18%Catholics 444,308 23.58% 10,247 0.71%Others 28,595 1.58% 2,167 0.19%

Results by nationality

Nation Number PercentageSerbo-Croats 1,826,657 96.63%Germans 16,471 0.87%Poles 10,705 0.57%Rusyns 8,146 0.43%Czechoslovaks 6,377 0.34% Slovenes 4,682 0.24% Others 17,402 0.92%

References