Smiljko Kostić (Serbian Cyrillic: Смиљко Костић; born 22 February 1945) is a retired politician and administrator in Serbia. From 1984 to 1998, he was the general manager of the tobacco firm Duvanska industrija Niš (DIN) in Niš. He served in the National Assembly of Serbia from 1991 to 1993 and was the mayor of mayor of Niš from 2004 to 2008. A member of the Socialist Party of Serbia (Socijalistička partija Srbije, SPS) for most of the 1990s, he later fell out of favour with Slobodan Milošević's administration, left the party, and was elected mayor in 2004 with an endorsement from New Serbia (Nova Srbija, NS).