thumb|300px|Entrance to the Paris metro in Pigalle
Pigalle () is an area in Paris, France, around the Place Pigalle, on the border between the 9th and the 18th arrondissements. It is named after the sculptor Jean-Baptiste Pigalle (1714–1785).
Pigalle is famous for being a tourist district, with many sex shops, theatres and adult shows on Place Pigalle and the main boulevards. The neighbourhood's raunchy reputation led to its Second World War nickname of "Pig Alley" by Allied soldiers. Le Divan du Monde and the Moulin Rouge, Other nightclubs in Rue Pigalle during the late 1930s included the Moon Rousse and Caravan, where Django Reinhardt played.
It was the home of the Grand Guignol theatre, which closed in 1962. However, the theatre building still stands.
Pigalle is well known to tourists who want to experience "Paris by night". It is home to some of Paris' most famous cabarets (the Moulin Rouge, for instance, was immortalised by artist Toulouse-Lautrec as well as Hollywood), as well as topless and nude shows.
The area to the south of Place Pigalle is devoted to musical instruments and equipment shops, especially for popular music. A section of the rue de Douai consists solely of stores selling guitars, drums and musical accessories.
Pigalle was one end-point of the RATP Montmartrobus (Autobus électrique Gépébus Oréos 55E, now public bus #40 serving the area) and is at the Pigalle stop of the Paris Métro.