The Constanța Casino (Romanian: Cazinoul din Constanța) is a former casino located in Constanța, Romania. Designated by the Romanian Ministry of Culture and National Patrimony as a historic monument, the casino is situated on the Constanța seafront along the Black Sea in the historic Peninsulă District of the city.

Three different buildings were constructed in the district to house a casino, with the first structure being erected of wood in 1880. Considered a symbol of the city of Constanța, the current structure was built in Art Nouveau style, designed and built according to the plans of Daniel Renard and inaugurated in August 1910. The current Casino was used for gambling operations for 38 years, with interruptions due to the two world wars: attacked and bombed by Bulgarian and German troops in World War I, ravaged in World War II, and, at one point, acting as a makeshift wartime hospital. In 1948, it was transformed into a community centre, and in 1960, it was handed to the National Office of Tourism, which converted it into a restaurant. The last major repairs took place in 1986–1988, and the building was abandoned until 2019. After five years of renovation works, the casino was again opened to visitors on 21 May 2025.