The Agrarian Union "Aleksandar Stamboliyski" (Bulgarian: Земеделски съюз „Александър Стамболийски“, romanized: Zemedelski Sayuz "Aleksandar Stamboliyski", ZS-AS), is an agrarian political party in Bulgaria.
It was founded in 1993 by members of the Bulgarian Agrarian People's Union.
Since 2001 it is part of the Coalition for Bulgaria, an alliance led by the Bulgarian Socialist Party.
At the Bulgarian parliamentary election in 2009, the Coalition for Bulgaria received 17.7% of the popular vote and 40 out of 240 seats.
In 2019 due to squabbles with BSP, ZS-AS left the alliance and its one single MP move to the group of the Independent MPs in parliament, still representing the ZS-AS.