In 1920 the Treaty of Trianon assigned most of the territory of the county to Romania, while the village of Nagypalád was passed to Czechoslovakia in 1921 after border adjustment agreement with Romania. According to the agreement also Akli and villages were passed to Czechoslovakia; whereas Bocskó, Ugocsakomlós, Avaspatak, Nagytarna ones and several municipalities in were passed to Romania. The northwest of the county remained in Hungary, and formed the new county Szatmár-Ugocsa-Bereg in 1923 with parts of the former Bereg and Ugocsa counties. The capital of this county was Mátészalka, which was previously in Szatmár county. By the First Vienna Award, Nagypalád was returned to Hungary and the county was recreated and later expanded with the Romanian part by the Second Vienna Award in 1940. After the end of World War II this part became again part of Romania and Nagypalád were passed to the Soviet Union, while the remaining territory in Hungary was renamed to Szatmár-Bereg county. In 1950, Szatmár-Bereg County was merged with large parts of Szabolcs county to form Szabolcs-Szatmár county. This county was renamed Szabolcs-Szatmár-Bereg in the 1990s. The Romanian part of the county is now part of the Romanian county Satu Mare, except the easternmost part, which is in Maramureş county.
Demographics
In 1900, the county had a population of 367,570 people and was composed of the following linguistic communities:
Hungarian: 235,015
Romanian: 118,770
German: 11,763
Slovak: 449
Ruthenian: 279
Croatian: 246
Serbian: 20
Other or unknown: 1,028
According to the census of 1900, the county was composed of the following religious communities:
Greek Catholic: 156,063
Calvinist: 118,866
Roman Catholic: 62,803
Jewish: 26,405
Eastern Orthodox: 2,260
Lutheran: 1,049
Unitarian: 40
Other or unknown: 84
In 1910, county had a population of 396,632 people and was composed of the following linguistic communities:
According to the census of 1910, the county was composed of the following religious communities:
Greek Catholic: 168,870
Calvinist: 126,826
Roman Catholic: 67,924
Jewish: 29,468
Eastern Orthodox: 2,202
Lutheran: 1,237
Unitarianist: 46
Other or unknown: 59
Subdivisions
In the early 20th century, the subdivisions of Szatmár county were: Csenger, Fehérgyarmat and Mátészalka are now in Hungary; the other towns mentioned are now in Romania.