Angiolo Tommasi was an Italian painter, active in the Macchiaioli movement. He was the brother of the painter Ludovico and cousin of the painter Adolfo Tommasi; all three were influential for the arts in their native Tuscany in the late 19th and early 20th-centuries. Angiolo painted both genre and landscape themes.

Tommasi first studied at the Scuola Comunale di Disegno in his native city under professor Natale Betti and Angiolo Lemmi, and then moved to Florence, where he enrolled for two years in the Academy of Fine Arts under Giuseppe Ciaranfi. Afterwards he was mentored, like his other family members in painting landscapes by Silvestro Lega.

His first works at the 1882 Promotrice of Florence were small vedute: Via Torretta a San Salvi and Lo scoglio della Madonna ad Antignano, accompanied by Una festa di vecchio; and the next year: Pensiero; Il desinare di Bussotto; Sull' Ema; In podere; Sull'Arno; and Ricomincia a piovere.

Tommasi subsequently exhibited: The smoker (il fumatore); Washerwomen at Etna; and an outdoor portrait of his sister. He also painted Sull'aia' ; La nonna; Il Gabbro; and a half-figure of Ciociaro. In 1886 at Livorno, he exhibited another Studio dal vero; and the next year, at Florence: Studio di vecchia; and il Ritorno dalla Fonte. To Venice he sent: Il riposo delle Gabbrigiane. After this he completed: Mattina d'estate, Bella Marina, which won a bronze medal at the 1889 Paris Exhibition, and was later exhibited in Chicago. At the 1889 Promotrice of Florence, Tommasi exhibited: Il pescatore di rezzaglio; Dopo il libeccio; Marina and, Ultime vangate. This last painting was awarded first prize, the Prize of Florence (2000 lire). Tommasi also painted portraits, for example: of signor Samama of Livorno, of signor Malenchini, of signor De Witt, of the naval engineer Orlando, and Comm. Costella, Sindaco of Livorno. In 1885, he exhibited a A figure of a Lady. Tommasi also sent a large canvas titled Studio dal vero to the Exposition.

The Tommasi house in Florence was a meeting place for painters and artists including Fattori, Borrani, and Colcos and other members of the circle of artists at the Caffè Michelangiolo. Tommasi also completed a number of trips to South America, including Patagonia and Tierra del Fuego. Paintings from these trips, sometimes commissioned by the Argentine government, were exhibited in Buenos Aires.

Returning from Argentina, he moved to Torre del Lago where he was surrounded by the "Club della Bohème", which included artists Giacomo Puccini, Ferruccio Pagni, Francesco Fanelli, Plinio Nomellini, and Raffaello Gambogi.