Šokci (Шокци, ʃǒkt͡si, ; Шокац, Шокица; Sokácok) are a South Slavic ethnic group native to historical regions of Baranya, Bačka, Slavonia and Syrmia. These regions today span eastern Croatia, southwestern Hungary, and northern Serbia. They primarily self-identify as a subgroup of Croats and therefore they are not considered a separate ethnicity in Croatia and elsewhere.
Šokci are considered to be a native population of Slavonia and Syrmia in Croatia. The Croatian Bureau of Statistics does not record the Šokci as a separate ethnicity (2001). According to the 2011 census in Serbia, 607 people declared as ethnic Šokci. Outside of Slavonia and Syrmia, they live in the settlements of Bački Monoštor, Sonta, Sombor, Bački Breg in the Serbian Bačka, and Hercegszántó in Hungary.
The term Šokac (masculine), Šokica and Šokčica (feminine), is used for the part of Croatian Ikavian speakers native in Slavonia, Baranja, Bačka and Bosnia. The oldest documents are from 1644–1698, 1702 (population of Đakovo Diocese), katolici, Šokci jali Slovinci ... Šokci rehuć Slovinci katolici. In Croatia, particularly in Lika it is opposed to term Vlachs (for Orthodox Serbs), and the Serbs pejoratively use it for the Croats. Denominal šokčiti ("Catholicize"), šoketati ("to speak Ikavian"). Eastern Slavonia and western Syrmia in Croatia is often referred to as Šokadija ("land of the Šokci"), although the term is not geographically limited, it is rather a general moniker for the Šokac "ancestral land". The ethnonym is of unknown etymological derivation, and there are several hypotheses on the origin:
Matija Petar Katančić (1750–1825), the first to theorize on the name, connected the ethnonym with the toponym of Succi or Succus in Thrace, found in the work of Ammianus Marcellinus (fl. 353–378). He also derived it from šljivov sok (plum juice). Ćiro Truhelka derived it from Albanian shoq < Latin sočius, but comparison to Montenegrin surname Šoć makes it dismissive. Others, including Vuk Karadžić, derived it from Italian word sciocco ˈʃɔkko ("frenzied, insane").