This map shows countries by percentage of Protestants around 1938. Data from official censuses or estimates by various researches/authors/other experts on the subject for each country/territory were used. Overall, data from 1920-1950 was used, mainly aiming for the year 1938 (i.e. if 1925 and 1936 data was available, 1936 data was chosen to be used here). Few countries in Europe had a close to 10% Protestant community, specifically Czechoslovakia and Romania. In Czechoslovakia, the Czechoslovak Church may or may not be considered Protestant. By 1938, Protestant minorities in those countries may have grown to 10-20%. Estimates for Africa/Oceania region are difficult to obtain and are of the worst quality as most of them was made largely using the late 20th/early 21st century spread to predict how it would look like around 1938; also taking into account maps showing European colonization in Africa.
Legend:

  90%-100%
  80%-90%
  70%-80%
  60%-70%
  50%-60%
  40%-50%
  30%-40%
  20%-30%
  10%-20%
  Below 10% or no data
A detailed Robinson projection SVG map with grouping enabled to connect all non-contiguous parts of a country's territory for easy colouring. Mollweide 1938.
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