Anna Rosalie Boch (10 February 1848 – 25 February 1936) was a Belgian painter.
Boch was born in Saint-Vaast, Hainaut. Anna Boch died in Ixelles in 1936 and is interred there in the Ixelles Cemetery, Brussels, Belgium.
She participated in the Neo-Impressionist movement. Her early works used a Pointillist technique, but she is best known for her Impressionist style which she adopted for most of her career. A pupil of Isidore Verheyden, she was influenced by Théo van Rysselberghe whom she met in the Groupe des XX.
Besides her own paintings, Anna Boch had one of the most important collections of impressionist paintings of its time. She promoted young artists including Vincent van Gogh whom she admired for his talent and who was a friend of her brother Eugène Boch. The Vigne Rouge (The Red Vineyard), purchased by Anna Boch, was long thought to be the only painting Van Gogh sold during his lifetime.
The Anna Boch collection was sold after her death. In her will she gave the money to pay for the retirement of poor artist friends.
An exhibition of her life and work was held at the Royal Museum of Mariemont with Morlanwelz, from October at December 2000.