Cunit (Catalan pronunciation: [kuˈnit]) is a coastal town on the Golden Coast (Costa Daurada in Catalan) in the Baix Penedès region part of the province of Tarragona in Catalonia, Spain. It is on the northeast coast of Spain on the Mediterranean Sea. It has a population of 15,804 (register office, 2024) .

It is located in the district of Baix Penedès and the province of Tarragona but is included in the third crown of the Urban Region of Barcelona. Bordered by Segur de Calafell (location of the municipality of Calafell), in the same area, as well as Cubelles in the district of Garraf and Castellet i la Gornal in the region of Alt Penedès, both from the province of Barcelona. The town has a rail link to Barcelona and further north as it forms part of the Rodalies de Catalunya regional railway network.

Cunit origins date back to prehistoric times, with archaeological remains found dating back to 3700 BC.

The first settlers are documented in a total of six well-documented sources.

This is a large and dispersed settlement. It is similar to neighbouring coastal settlements of the Baix Penedès which used to trade a great deal with punicobusitans traders. A relationship that no doubt had its own weight in the transformation of the habits and customs of the early settlers.

The 1590, although the town had been almost depopulated by the incursions of the Saracen pirates and Turkey (1581), the Mas of Vilaseca remained populated. There are also references to a fishing settlement on the beach, documented in 1638 in 1670, residents from time immemorial were licensed to fish on Sundays and religious holidays, on payment of a stipend of one tenth of the catch to the local parish.

From 1960, Cunit began to become a summer vacation centre for the BarcelonaMetropolitan Area. At the same time, it started to become a major residential area of the Golden Coast

Mediterranean climate provides mild winters and hot summers.