Roč is a tiny town in Istria, north-west Croatia, with a population of only 180 people. It is about 50 km south-east of Trieste, Italy, located on the road Trieste — Koper — Učka tunnel — Rijeka. Its other names are Ruz, Ronz and Rozzo.

Roč is considered a town rather than a village due to its rich cultural heritage. Its name is first mentioned in writing in 1064. The local Church of St. Anthony holds the precious Roč Glagolitic Abecedarium from the 1200s. The first Croatian printed book, the Missal of 1483, was prepared in Roč by one Juri Žakan.

The town of Roč is declared by the authorities as an important cultural monument, as it has a well preserved city walls from the Middle Ages with two entrances, a Roman lapidarium , a Venetian bombarda cannon and a functional watchtower. Furthermore, it has the church of St. Anton from the 12th, St. Rok from the 14th and St. Bertol from the 15th century, and numerous other smaller artifacts preserved in the ancient buildings.

Seven kilometers from Roč there's Hum, with a population of only 22 people often called the smallest town in the world. Along the road from Roč to Hum there's a memorial alley of ten monuments from the history of the Glagolitic alphabet.