Demographic history of Croatian Baranja

Early 16th century
In the early 16th century, before Ottoman conquest, Baranja was populated by Croats and Hungarians.

16th–17th century
During the Ottoman advances in the 16th and 17th centuries, there was a growing number of refugees from Serbia and Bosnia, both Catholic and Orthodox (Croats, Serbs, Vlachs, Montenegrins and others), entering Baranja. During the Habsburg-Ottoman wars, at the end of the 17th century, almost the entire Muslim population and a part of the Orthodox population, retreated, along with the Ottoman army. Nevertheless, some Croats, Hungarians and Orthodox settlers (especially Serbs and perhaps also some Vlachs) remained in the villages.

1711–1713
In 1711–1713, in the southern (Croatian) Baranja, ethnic composition was:
 * Serbs (39%) (*)
 * Hungarians (37%)
 * Croats (Šokci) (22%) (*)

(*) Total percent of South Slavs (Serbs and Croats/Šokci) in the area was 61%.

1721–1723
In 1721–1723, in the southern (Croatian) Baranja, ethnic composition was:
 * Hungarians (36%)
 * Croats (31%) (*)
 * Serbs (23%) (*)

(*) Total percent of South Slavs (Croats and Serbs) in the area was 54%.

1855
In 1855, according to a religious population census in modern-day Croatian Baranja, there were 38,295 inhabitants in Baranja:
 * 23,849 Roman Catholics (62.28%)
 * 8,187 Calvinists (21.38%)
 * 5,277 Eastern Orthodox (13.78%)
 * 660 Reformists (1.72%)
 * 322 Jews (0.84%)

1900
According to Revai Lexicon (Volume II, p. 587) 1900, in the district of Branjin Vrh (whose borders roughly, but not entirely corresponded with southern, Croatian Baranja) there were 47,470 inhabitants. They include:
 * Hungarians = 17,325 (36.50%)
 * Germans = 12,324 (25.96%)
 * Croats = 11,198 (23.59%) (*)
 * Serbs = 5,873 (12.37%) (*)
 * Others = 750 (1.58%)

(*) Total number of South Slavs (Croats and Serbs) in the area was 17,071 (35.96%).

1910
In 1910, the population of southern (present-day Croatian) part of Baranja numbered 50,757 people, of whom:
 * 20,313 (40.0%) spoke the Hungarian language
 * 13,577 (26.7%) spoke the German language
 * 6,194 (12.2%) spoke the Serbian language (*)
 * 1,888 (3.7%) spoke the Croatian language (*)
 * 58 spoke the Slovak language
 * 2 spoke the Romanian language
 * some 8,725 (17.2%) spoke other languages, in this case the Šokac language (*)

(*) Total number of speakers of South Slavic languages (Serbian, Croatian, and Šokac) in Croatian Baranja can be estimated at around 15,000 (29.6%).

1920
In 1920, in Yugoslav (now Croatian) Baranja, ethnic composition was:
 * Germans = 16,253 (32.9%)
 * Hungarians = 14,636 (29.6%)
 * Šokci, Bunjevci, and Croats = 8,822 (17.8%) (*)
 * Serbs = 6,782 (13.7%) (*)

(*) Total number of South Slavs (Šokci, Bunjevci, Croats, Serbs) in the area was 15,604 (31.5%).

1921
In 1921, there was a population of 49,694 in Yugoslav (now Croatian) Baranja, including:
 * Hungarians = 16,639 (33.5%)
 * Germans = 15,955 (32.1%)
 * Croats = 9,965 (20.0%) (*)
 * Serbs = 6,782 (13.6%) (*)
 * Other = 363 (0.7%)

(*) Total number of South Slavs (Croats and Serbs) in the area was 16,747 (33.7%).

According to another source, in 1921, the population of Yugoslav (now Croatian) Baranja numbered 49,452 people, of whom:
 * 16,638 (33.65%) spoke Hungarian language
 * 16,253 (32.87%) spoke German language
 * 15,604 (31.55%) spoke Serbo-Croatian language

1931
In 1931, in the Yugoslav (now Croatian) Baranja, ethnic composition was:
 * Germans (29.8%)
 * Hungarians (26.4%)
 * Serbs (21.4%) (*)
 * Croats (19.7%) (*)

(*) Total percent of South Slavs (Serbs and Croats) in the area was 40.7%.

1961
In 1961, the population of Yugoslav/Croatian Baranja numbered 56,087 inhabitants, including:
 * 23,514 (41.9%) Croats
 * 15,303 (27.2%) Hungarians
 * 13,698 (24.4%) Serbs

1991
In 1991, the population of Yugoslav/Croatian Baranja had 54,265 inhabitants, including:
 * 22,740 (41.91%) Croats
 * 13,851 (25.52%) Serbs
 * 8,956 (16.50%) Hungarians
 * 4,265 (7.86%) Yugoslavs
 * 4,453 (8.21%) others

According to another source, in 1991, the population of Yugoslav/Croatian Baranja included:
 * 19,310 Croats
 * 12,857 Serbs
 * 9,920 Hungarians
 * about 12,000 others (including Slovenes, Albanians, Germans, etc.).

1992
In 1992 (during the war in Croatia), the population of Croatian Baranja (in that time administered by Republic of Serbian Krajina) numbered 39,482 inhabitants, including:
 * 23,485 (59.41%) Serbs
 * 7,689 (19.48%) Croats
 * 6,926 (17.54%) Hungarians
 * 490 (1.24%) Yugoslavs
 * 919 (2.33%) others

2001
In 2001, the population of Croatian Baranja numbered 42,633 inhabitants, including:
 * Croats = 23,693 (55.57%)
 * Serbs = 8,592 (20.15%)
 * Hungarians = 7,114 (16.69%)
 * others = 3,234 (7.58%)

2011
In 2011, the population of Croatian Baranja numbered 39,420 inhabitants, including:
 * Croats = 23,041 (58.45%)
 * Serbs = 7,278 (18.46%)
 * Hungarians = 5,980 (15.17%)
 * others = 3,121 (7.92%)