In the aftermath of World War I, most of Gömör-Kishont county became part of newly formed Czechoslovakia, as recognized by the concerned states in the 1920 Treaty of Trianon. The area around Putnok became part of the Hungarian county Borsod-Gömör-Kishont (currently part of Borsod-Abaúj-Zemplén). The Czechoslovak part of the county was part of the Slovak Land (Slovenská krajina/zem).
Following the provisions of the controversial First Vienna Award, most of the Czechoslovak part came under Hungarian control in November 1938. The Gömör-Kishont county was recreated. The small northernmost part that remained in Slovak hands (a.o. the towns Dobšiná and Revúca) became part of the new Hron county (Pohronská župa). The Trianon borders were restored after World War II. Since 1993, when Czechoslovakia was split, Gemer and Malohont have been part of Slovakia, and since 1996 divided between the Košice region and the Banská Bystrica region.
|Feled||Feled, SK Jesenské|
|Garamvölgy||Nándorvölgy, SK Vaľkovňa|
|Nagyrőce||Jolsva, SK Jelšava|
|Ratkó||Ratkó, SK Ratková|
|Rimaszombat||Nyustya, SK Hnúšťa|
|Rozsnyó||Rozsnyó, SK Rožňava|
|Tornalja||Tornalja, SK Tornaľa|
|Urban districts (rendezett tanácsú város)|
|Dobsina, SK Dobšiná|
|Jolsva, SK Jelšava|
|Nagyrőce, SK Revúca|
|Rimaszombat, SK Rimavská Sobota|
|Rozsnyó, SK Rožňava|