Arslanköy (also called Efrenk) is a neighbourhood in the municipality and district of Toroslar, Mersin Province, Turkey.

Located about 3 kilometers south from the town is a small garrison fort that consists of several walls and a gate that block access to the summit of a limestone outcrop.

It is located in the Taurus Mountains near the junction of several strategic roads which lead from both Çandır Castle (Papeṙōn) and the Mediterranean Sea to Cappadocia.

[6] Among the early settlers were nomadic Oghuz Turks (Turkmens) who began to use the vicinity as a summer camp (Turkish: yayla) in the 14th century.

Arslanköy previously an ambiguous village, made news in 1947 local elections.