UbuJuda (esisuka kwisiHebhereu: יהדות‎) inkolo yokukholelwa kuThixo omnye kunye nendlela yokuphila kunye nesiko labantu abangamaJuda kwiindawo ezahlukeneyo emhlabeni jikelele. UbuJuda bokuqala yayiyinguqulelo yenkolo yeBhayibhile ekukholelwa ukuba yaqala xa uThixo wenza isivumelwano nabantu abangamaJuda (okanye abantu bakwa-Israyeli). Iincwadi ezisisiseko zobuJuda yiTorah, iTanakh, iTalmud, kunye neMishnah. U-Abraham uthathwa njengowokuqala wamaJuda kunye noyise wabantu abangamaJuda. Umbuso wabantu abangamaJuda wamiselwa phantsi koSawule kunye nookumkani uDavide noSolomoni, yaye iYerusalem yaba likomkhulu labo. Emva kokulawula kukaSolomoni, isizwe sahlulahlulwe saba yimibuso emibini: uMbuso wakwa-Israyeli (emantla) kunye noMbuso wakwaJuda (emzantsi). Ngexesha leNkqubo Ephakathi, kwaqala ukusasazeka kwabantu abangamaJuda, kunye nokwanda kokuzondwa kwamaSemite njengendlela yokucinezelwa ngokweenkolo kunye nokugxothwa kwiindawo. Ngexesha leMfazwe Yehlabathi II, phantsi kobunazi, kwenzeka enye yezona zinto zibuhlungu zokucinezelwa kwabantu abangamaJuda, eyaziwa ngokuba yiHolocaust.