Charles Alexandre Giron was a Swiss painter and art critic. He specialized in portraits and scenes with figures; some of them mildly humorous.

His father, Antoine-Alexandre Giron, was a Catholic from Spain, who came to Switzerland via Sardinia. His mother, Marie Henriod, was a Huguenot from Neuchâtel.

Initially, he was apprenticed to an enameler, but decided to become an artist instead. He began by taking lessons from François Diday and Barthélemy Menn in Geneva. In 1872, he went to Paris, where he frequented the Hôtel de Nice, a boarding house on the Rue des Beaux-Arts [fr] that was home to some painters from Switzerland. Later, he shared several studios with Max Leenhardt. His first exhibition at the Salon came in 1876 and consisted mostly of landscapes. Eventually, he found a position in the studios of Alexandre Cabanel at the École des Beaux-Arts.

During his time in France, he travelled extensively, visiting England, the Netherlands and Italy. A planned tour of India, sponsored by the Maharajah of Baroda, failed to materialize. He was awarded the Order of Leopold in 1887 and, the following year, was named a Chevalier in the Legion of Honor. In 1891, he married Jeanne Antoinette Forget; the daughter of a merchant. They had three children. Their daughter, Simone, married into the noble Pourtalès family [fr]

After being active in Paris and Cannes, he and his family returned to Switzerland in 1896 and lived in several locations before settling in Genthod. In his capacity as an art critic, he came to the defense of Ferdinand Hodler, when Hodler's controversial proposal for frescoes in the Weapons Room at the Swiss National Museum was rejected. He sat on the admissions jury for the Exposition Universelle (1900). In 1901, he created murals for the National Council in Berne. From 1898 to 1912, he served several terms on the Eidgenössische Kunstkommission [de] (Federal Fine Arts Commission). In 1913, he suffered a stroke that left him unable to paint.