Koh-i-Noor (ana kuma furta Koh-i-Nûr da Kooh-è Noor, kokuma Kohinur a furucin Hausa) wani babban zinare ne mai darajar gaske da aka sameshi a garin Guntur na jahar Andhra Pradesh kasar Indiya, a karni na goma sha uku. Ma'anar sunan shine Hasken Tsauni a harshen Pashiya. Kafin a yanke shi, nauyinsa yakai giram 793. Daular Kakatiya ce farkon mamallakiyar zinaren. Daga baya mallakin zinaren ya sauya zuwa hannayen daban-daban a yankin Kudancin Asiya. Karshe dai zinaren Koh-i-Noor ya karkare ne a hannan sarauniya Victoria bayan Birtaniya ta karbe iko da yankin Punjab a 1849. A yanzu zinaren a ikon Birtaniya ne. Tun baya bayyanar sa a Birtaniya zinaren yakasance ne a karkashin ikon matayen dake sarautar masarautar ta Birtaniya, ya fara ne daga hannun Sarauniya Victoria. Bayan rasuwar Victoria sai Koh-i-Noor yakoma hannun Sarauniya Alexandra, matar Edward VII. Daga nan sai zinaren ya koma hannun Sarauniya Mary a 1911, daga karshe zinaren ya koma hannun Sarauniya Elizabeth 1 a 1937. Bayan rasuwar ta a 2002, yanzu zinaren yana karkashin ikon ma'ajiyar zinare ta Birtaniya.