Arsuz is a municipality and district located in the Hatay Province of Turkey. It covers an area of 462 km² and had a population of 101,233 as of 2022. The district encompasses the southwestern portion of the İskenderun agglomeration along with its adjacent countryside and coastline.
Historically, the area was known by the name Rhosus in ancient times. It also served as a former bishopric and titular see.