Comune in Lazio, Italy Fontana Liri Comune Comune di Fontana Liri A view in upper Fontana Liri. Location of Fontana Liri Fontana Liri Location of Fontana Liri in Italy Show map of Italy Fontana Liri Fontana Liri (Lazio) Show map of Lazio Coordinates: 41°37′N 13°33′E﻿ / ﻿41.617°N 13.550°E﻿ / 41.617; 13.550 Country Italy Region Lazio Province Frosinone (FR) Government • Mayor Gianpio Sarracco Area [1] • Total 16.0 km2 (6.2 sq mi) Elevation 150 m (490 ft) Population (31 August 2017)[2] • Total 2,932 • Density 180/km2 (470/sq mi) Demonym Fontanesi Time zone UTC+1 (CET) • Summer (DST) UTC+2 (CEST) Postal code 03035 Dialing code 0776 Website Official website