Alexandre-Louis Leloir (14 March 1843 – 28 January 1884) was a French painter specializing in genre and history paintings.

Alexandre-Louis Leloir was born in Paris into an esteemed artistic lineage, being the son of painter Auguste Leloir and fashion illustrator Héloïse Colin. He was also the grandson of the celebrated painter Alexandre-Marie Colin. His brother, Maurice Leloir, became a renowned painter and illustrator as well.

Nurtured by this artistic environment, Leloir's foundational art training came from his family, especially from his maternal grandfather, Alexandre Colin, a former student of Girodet. Leloir then honed his skills at the École des Beaux-Arts from 1860. He made multiple bids for the esteemed Prix de Rome, securing the Second Grand Prix several times, including in 1861 with "The Death of Priam" and in 1864 with "Homer on the island of Scyros."

He gained recognition at the Paris Exposition in 1878 and notably stood out in the 1864 competition for the painted half-figure.

Leloir's artistic prowess primarily lay in historical narratives and genre scenes. He made his Salon debut in 1863 with "Massacre of Innocents." Another exemplary work, "The Fight of Jacob with the Angel," was showcased at the Salon of 1865. From 1868, he shifted his focus to genre scenes, deriving inspiration from medieval life, the Grand Siècle's interiors in the Dutch style, and Orientalist settings.

Apart from his paintings, Leloir illustrated various editions, including works by Molière. He also played a pivotal role in establishing the Society of French Watercolourists in 1879. For his contributions to art, Leloir was honored as a Chevalier of the Legion of Honor in 1876.