Kulottunga Chola I (/kʊˈloʊtʊŋɡə/; Middle Tamil: Kulōttuṅka Cōḻaṉ; Classical Sanskrit: Kulottuṅgā Cōḷa; 1025–1122) also spelt Kulothunga (lit. 'The Exalter of His Clan'), born Rajendra Chalukya (Telugu: Rājēndra Cāḷukyuḍu), was a Chola Emperor who reigned from 1070 to 1122 succeeding his cousin Athirajendra Chola. He also served as the Eastern Chalukya monarch from 1061 to 1118, succeeding his father Rajaraja Narendra. He is related to the Chola dynasty through his mother's side and the Eastern Chalukyas through his father's side. His mother, Ammangaidevi, was a Chola princess and the daughter of emperor Rajendra Chola I. His father was king Rajaraja Narendra of the Eastern Chalukya dynasty who was the nephew of Rajendra and maternal grandson of Rajaraja Chola I. According to historian Sailendra Nath Sen, his accession marked the beginning of a new era and ushered in a period of internal peace and benevolent administration. He was succeeded by his son Vikrama Chola.
Kulottunga had diplomatic relations with the northern Indian city Kannauj and also with distant countries like Cambodia, Srivijaya, Khmer, Pagan (Burma), and China. He established Chola overlordship over the Srivijayan province of Kedah in Malay Peninsula. An inscription in a Taoist temple in Guangzhou, dated to 1079, declares Kulottunga, king of Chulien (Chola) to be the supreme chief of the Land of San-fo-tsi (Srivijaya). According to Tan Yeok Seong, the editor of the inscription, Kulottunga ruled both the Chola and Srivijayan kingdoms. In the small Leyden grant that is dated to 1090, the king of Kadaram (Srivijaya) is mentioned as a vassal of Kulottunga. Like his predecessors, Kulottunga was a patron of arts and literature and the much celebrated Tamil poem Kalingattuparani was composed during his rule by poet Jayamkondaan who lived in his court. His records also testify to the highly organised system of fiscal and local administration. During his reign Kulottunga carried out a massive land survey that formed the basis for taxation.