Subaşı is a town (belde) in the Altınova District, Yalova Province, Turkey.

[1] It is close to Hersek Headland of Marmara Sea and has almost merged to Altınova to the east.

The name of the village refers to subaşi, a title in the Ottoman bureaucracy and the residents of the town are mostly Turkish, Tatar and Gagauz migrants who left Dobrudzha and Deliorman area in Romania today Bulgaria around 1935.

It suffered severely in the 7.6 magnitude 1999 İzmit earthquake.

This geographical article about a location in Yalova Province, Turkey is a stub.