At the Moulin Rouge is an oil-on-canvas painting by French artist Henri de Toulouse-Lautrec. It was painted between 1892 and 1895. It is one of a number of works by Toulouse-Lautrec depicting the Moulin Rouge cabaret built in Paris in 1889; the others include At the Moulin Rouge, The Dance, and the poster Moulin Rouge: La Goulue. Included in the background is a self-portrait of the artist.
The painting portrays near its center a group of three men and two women sitting around a table situated on the floor of the cabaret. From right to left, the people at the table include: Édouard Dujardin, dancer La Macarona, photographer Paul Secau, and photographer Maurice Guibert. In the right foreground, apparently sitting at a different table, is a partial profile, with her face lit in a distinctive light, of English dancer May Milton. In the background on the right is Moulin Rouge dancer La Goulue and a woman. The center-left background shows Toulouse-Lautrec himself, as well as Gabriel Tapié de Céleyran.