Demre is a municipality and district of Antalya Province, Turkey. Its area is 329 km², and its population is 27,691 (2022). It was named after the river Demre.

Demre is the Lycian town of Myra, the home of Saint Nicholas of Myra. The district was known as Kale until it was renamed in 2005. A substantial Christian community of Greeks lived in Demre until the 1920s when they migrated to Greece as part of the 1923 population exchange between Greece and Turkey. A small population of Turkish farmers moved into the region when the Greeks migrated. The region is popular with tourists today, particularly Christian pilgrims who visit the tomb of Saint Nicholas.

Demre is on the coast of the Teke peninsula, west of the bay of Antalya, with the Taurus Mountains behind. The mountains are forested and the coastal strip is made of good soil brought down by the mountain rivers. The climate is the typical Mediterranean pattern of hot dry summers and warm wet winters.

Before the tourism boom began in the 1980s, the local economy depended on agriculture, which is still important today. The villages of Demre grow pomegranates and citrus fruits and now a large quantity of fruits and vegetables all year round in greenhouses. Also with its rich history, attractions like the island of Kekova, the sea and warm weather, this coast is very popular with holidaymakers from Turkey and all over Europe, although Demre still does not have the high volume of tourists enjoyed by districts nearer Antalya Airport. Some local handicrafts like rug making, and events such as the annual camel wrestling festival bring in extra income.

The local cuisine includes fish and other seafood from the Mediterranean.

Demre has a hot-summer Mediterranean climate (Köppen: Csa), with very hot, dry summers and mild, rainy winters.

There are 17 neighbourhoods in Demre District:

The district has a population of 27,691 (2022). The town itself has 18,268 inhabitants.