Kocabaş is a neighbourhood of the municipality and district of Honaz, Denizli Province, Turkey.Mahalle , Turkey Civil Administration Departments Inventory. Retrieved 12 July 2023. Its population is 934 (2022). Before the 2013 reorganisation, it was a town (belde).

It is situated in the plains of Büyük Menderes River (historical Maeander). The distance to Honaz is and to Denizli is . Although the fertile area round Kocabaş was always populated in the historical ages, the town in the open plains is a relatively recent settlement probably because of the security reasons.

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