Transylvania population of Transylvania for the years 1830-1840 the majority were 62.3% Romanians and 23.3% Hungarians. In the last quarter of the 19th century, the Hungarian population of Transylvania increased from 24.9% in 1869 to 31.6%, as indicated in the 1910 Hungarian census. At the same time, the percentage of Romanian population decreased from 59.0% to 53.8% and the percentage of German population decreased from 11.9% to 10.7%, for a total population of 5,262,495. Magyarization policies greatly contributed to this shift. The percentage of Romanian majority has significantly increased since the declaration of the union of Transylvania with Romania after World
Transylvania 1526, Transylvania was a voivodeship in the Kingdom of Hungary, led by a voivode appointed by the King of Hungary. After the Battle of Mohács in 1526, Transylvania became part of the Kingdom of János Szapolyai. Later, in 1570, the kingdom transformed into the Principality of Transylvania, which was ruled primarily by Calvinist Hungarian princes. During that time, the ethnic composition of Transylvania transformed from an estimated near equal number of the ethnic groups to a Romanian majority. Vasile Lupu estimates their number already more than one-third of the population of Transylvania in a letter to the sultan around 1650.