As of January 2010, the Italian national institute of statistics ISTAT estimated that 497,940 foreign-born immigrants live in Lazio, equal to 8.8% of the total regional population.
Vendar pa je gostota prebivalstva skoraj 800 preb./km² v visoko urbanizirani pokrajini Rim in manj kot 60 preb./km² v goratem delu in na podeželja (pokrajina Rieti).