Slanchev Bryag, English: Sunny Beach, is a major seaside resort on the Black Sea coast of Bulgaria, located approximately 35 km (22 mi) north of Burgas in Nesebar Municipality in Burgas Province.

Created in 1958 as a weekend getaway for Bulgarian families, Sunny Beach has grown to become the largest tourist and vacation spot in the country. Today, the area contributes significant part of the province's annual gross domestic product. Initially a small beachside resort, it has grown to include a large variety of recreational activities and services, gambling establishments as well as sports and music venues.

Its rapid growth makes it the largest resort on the entire Black Sea coast; to the south, the complex has merged with the built-up suburbs of the town of Nessebar.

Sunny Beach has a very small permanent population, but during the summer the resort is home to many thousands of tourists. The main strip of high-rise hotels backing onto the beach is 5 km (3 mi) long and extends along a wide bay between Sveti Vlas and Nessebar, soon to connect with the village of Tunkovo.

Attractions for tourists include the beach, water sports, and the nearby historic site of Nessebar. There are two water parks near the resort and third to be built soon near the exit to Kosharitca. The Decade of Symphonic Music, part of the International Folklore Festival, fashion shows, and various beach competitions are held in Sunny Beach. The Golden Orpheus song contest was held here until 1999.