Ten people died Wednesday when a lorry and a minibus carrying farming workers crashed head-on near Ankara, Anatolia news agency quoted a senior official as saying.
Three people were seriously injured in the accident on a road outside Beypazari, a town 100 kilometres (62 miles) northwest of the Turkish capital, local sub-governor Mustafa Kaya told Anatolia.
Most of the dead were migrants from the mainly-Kurdish southeast and bore the same surname, he said, suggesting they were from the same family.
Deadly road accidents are a daily occurrence in Turkey, where respect for traffic rules is minimal.
According to police figures, 4,300 people were killed and more than 200,000 injured in about one million traffic accidents across the country in 2009.