Comune in Lazio, Italy Santa Marinella Comune Comune di Santa Marinella Coat of arms Location of Santa Marinella Santa Marinella Location of Santa Marinella in Italy Show map of Italy Santa Marinella Santa Marinella (Lazio) Show map of Lazio Coordinates: 42°2′N 11°51′E﻿ / ﻿42.033°N 11.850°E﻿ / 42.033; 11.850 Country Italy Region Lazio Metropolitan city Rome (RM) Frazioni Santa Severa Government • Mayor Pietro Tidei Area [1] • Total 49.2 km2 (19.0 sq mi) Elevation 7 m (23 ft) Population (2008)[2] • Total 17,643 • Density 360/km2 (930/sq mi) Demonym(s) Santamarinellesi Time zone UTC+1 (CET) • Summer (DST) UTC+2 (CEST) Postal code 00058 Dialing code 0766 Patron saint St. Joseph Saint day March 19 Website Official website