REGION - LAZIO
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| Provincia | Pop.1999 | Households | Sq.hm |
| FROSINONE | 494.495 | 176.398 | 324.358 |
| LATINA | 508.048 | 182.896 | 225.060 |
| RIETI | 150.650 | 59.663 | 274.916 |
| ROMA | 3.809.829 | 1.465.710 | 535.124 |
| VITERBO | 292.006 | 112.076 | 361.225 |
| Fonte Istat | 5.255.028 | 1.996.743 | 1.720.683 |