ISOLA DEL LIRI, a town of Lazio, province of Frosi none, Italy, 15 m. by rail N.N.W. of Roccasecca, which is on the main line from Rome to Naples, 10 m. N.W. of Cassino. Pop. (1931), town 1,741 ; commune, 9,776. The town, as its name implies, is situated between two arms of the Liri. The many waterfalls of this river and of the Fibreno afford motive power for several important paper-mills ; felt and blankets are also made. About I m. to the north is the church of San Domenico,
erected in the I2th century, which probably marks the site of the villa of Cicero (see ARPINO).