Serikbolsyn Abdildaevich Abdildin (Kazakh: Серікболсын Әбділдаұлы Әбділдин, Serıkbolsyn Äbdıldaūly Äbdıldin, [sʲerɘkˈboɫsɤn æbdɘlˌdɑʊˈɫɤ æbdɘlˈdɪn]; 25 November 1937 – 31 December 2019) was a Kazakh economist, politician, First Secretary of the Communist Party from 1996 to 2010, member of the Mazhilis from 1999 to 2004 and a candidate in the 1999 presidential election.

While proclaiming himself as a Communist, Abdildin was vivid supporter for democracy and has called for reforms for a multi-party system with a rule of law.

After the dissolution of the legislature, he joined the opposition amidst President Nursultan Nazarbayev's increase of executive powers by leading the Communist Party of Kazakhstan and has worked in various organisations and movements aiming at reforming Kazakhstan's political system into democratic form of governance until retiring from politics in 2010.

From 1963, Abdildin attended the graduate school at the Veterinary Institute in Alma-Ata and between 1966 and 1967, he was employed there as a research assistant.

[3] He criticized President Nursultan Nazarbayev over his free-market policies to which he blamed for economic crisis in the country and proposed for Kazakhstan to instead implement a mixed-economic system.

The QKHP members blamed Äbdildin of splitting the party and accused him of working for the CIA by attempting to start a colour revolution in the country.

[11] On 2 November 2004, Äbdildin became a member of the National Commission on Democracy and Civil Society, created as an advisory body under the President of Kazakhstan.

[15] In his last interview in June 2019, Äbdildin said that Nazarbayev should've resigned from presidency long ago and that his successor Kassym-Jomart Tokayev offers nothing in change of the country's leadership but is "more trustable" than his predecessor.

[16] He made his last public appearance at the Kurultai on 7 September 2019, saying the country should "get rid of Nazarbayev" to which he received applause from the audience.

[19] A funeral was held in front of the Jambyl Kazakh State Philharmonic building on 3 January 2020 which was attended by human rights activists, opposition politicians, and the city administration representatives.