Aleš Cerin (born 18 July 1949) is a Slovenian businessman and a politician.
In 1973, he graduated from law at the University of Ljubljana.
He was the Secretary-General of the Government of the Republic of Slovenia since 1986 till 1992, during the Slovenian proclamation of independence in 1991.
Since 1992, he worked in the retail company Mercator, and was since 1997 till 2005 member of its executive board.
He was elected to the city council of the City Municipality of Ljubljana in October 2006 as a member of the Zoran Jankovic List and was named by Jankovic a deputy mayor of the municipality.On 22 December midnight, he replaced Zoran Jankovic as the leader of the municipality, as Jankovic was elected to the National Assembly and retained his mayoral post only till 21 December 2011, midnight.
The replacement was made according to the law, but Cerin's leading position was only compatible with the statute of the municipality until the beginning of January 2012, when a tender for the by-election was opened.
The election was held on 25 March 2012.Cerin is also a keen bicycler and was the president of the Cycling Federation of Slovenia from 1997 till 2005.