Beaulieu-sur-Mer (French: [boljø syʁ mɛʁ]; Occitan: Bèuluec de Mar; Italian: Belluogo; lit.

"Beautiful Place on the Sea"), commonly referred to simply as Beaulieu, is a seaside commune on the French Riviera between Nice and the Principality of Monaco.

The area was part of the commune of Villefranche-sur-Mer until mid-1891, when the French Parliament voted in favour of the bill allowing for the separation following local support and a positive recommendation from the General Council of Alpes-Maritimes.

The commune was renamed Beaulieu-sur-Mer from Beaulieu in 1908; the name has previously been changed from the Italian name Belloloco in 1860, after the incorporation of the County of Nice into France.

Tourism helped the commune develop economically, as it welcomed writer Leo Tolstoy, civil engineer Gustave Eiffel, publisher James Gordon Bennett Jr., composer Igor Stravinsky, as well as other personalities and monarchs from major European countries.