| Name | What | Region | Country | Lat | Long | Elev ft. | Pop est |
|---|---|---|---|---|---|---|---|
| Olang - Valdaora | city | Trentino-Sudtirol | Italy | 46.77 | 12.03 | 3451 | 6897 |
| Olba | city | Liguria | Italy | 44.48 | 8.58 | 1922 | 2337 |
| Olbia | city | Sardegna | Italy | 40.92 | 9.52 | 0 | 9794 |
| Olbia Marittima | city | Sardegna | Italy | 40.92 | 9.52 | 0 | 9794 |
| Olbicella | city | Piemonte | Italy | 44.53 | 8.58 | 1669 | 3264 |
| Olcenengo | city | Piemonte | Italy | 45.37 | 8.32 | 830 | 6573 |
| Olda | city | Lombardia | Italy | 45.88 | 9.55 | 2043 | 3936 |
| Oldaniga | city | Lombardia | Italy | 45.62 | 9.38 | 830 | 105618 |
| Oldenico | city | Piemonte | Italy | 45.40 | 8.38 | 830 | 5719 |
| Oleggio | city | Piemonte | Italy | 45.60 | 8.63 | 830 | 18810 |
| Oleis | city | Friuli-Venezia Giulia | Italy | 46.02 | 13.40 | 367 | 15819 |
| Olengo | city | Piemonte | Italy | 45.42 | 8.67 | 393 | 51695 |
| Olevano | city | Lazio | Italy | 41.87 | 13.03 | 1896 | 16185 |
| Olevano Romano | city | Lazio | Italy | 41.87 | 13.03 | 1896 | 16185 |
| Olevano di Lomellina | city | Lombardia | Italy | 45.22 | 8.72 | 328 | 15104 |
| Olevano sul Tusciano | city | Campania | Italy | 40.67 | 15.02 | 830 | 27417 |
| Olevole | city | Umbria | Italy | 42.87 | 12.08 | 830 | 3102 |
| Olgia | city | Piemonte | Italy | 46.15 | 8.58 | 2070 | 1669 |
| Olgiasca | city | Lombardia | Italy | 46.12 | 9.32 | 1669 | 12721 |
| Olgiata | city | Lazio | Italy | 42.03 | 12.37 | 321 | 146634 |
| Olgiate | city | Lombardia | Italy | 45.80 | 8.97 | 1167 | 67579 |
| Olgiate Calco | city | Lombardia | Italy | 45.73 | 9.40 | 853 | 63327 |
| Olgiate Comasco | city | Lombardia | Italy | 45.80 | 8.97 | 1167 | 67579 |
| Olgiate Molgora | city | Lombardia | Italy | 45.73 | 9.40 | 853 | 63327 |
| Olgiate Novocomense | city | Lombardia | Italy | 45.80 | 8.97 | 1167 | 67579 |
| Olgiate Olona | city | Lombardia | Italy | 45.63 | 8.88 | 830 | 166405 |
| Olginate | city | Lombardia | Italy | 45.80 | 9.40 | 830 | 70944 |
| Olibra Incinante | city | Marche | Italy | 42.87 | 13.45 | 1669 | 5276 |
| Olibra Incinesca | city | Marche | Italy | 42.87 | 13.52 | 1003 | 19899 |
| Oliena | city | Sardegna | Italy | 40.27 | 9.40 | 1820 | 9942 |
| Oliero | city | Veneto | Italy | 45.85 | 11.67 | 830 | 11304 |
| Oliva | city | Calabria | Italy | 38.32 | 15.98 | 830 | 15758 |
| Olivadi | city | Calabria | Italy | 38.72 | 16.42 | 1669 | 13779 |
| Olivarella | city | Sicilia | Italy | 38.17 | 15.27 | 830 | 54752 |
| Olivaro | city | Calabria | Italy | 39.27 | 16.68 | 3484 | 5735 |
| Olivaru | city | Calabria | Italy | 39.27 | 16.68 | 3484 | 5735 |
| Oliveri | city | Sicilia | Italy | 38.12 | 15.05 | 265 | 14133 |
| Oliveto | city | Emilia-Romagna | Italy | 44.47 | 11.12 | 830 | 16013 |
| Oliveto | city | Toscana | Italy | 43.38 | 11.73 | 885 | 11245 |
| Oliveto | city | Lazio | Italy | 42.25 | 12.88 | 1863 | 4443 |
| Oliveto | city | Calabria | Italy | 38.05 | 15.70 | 1046 | 59044 |
| Oliveto | city | Calabria | Italy | 39.58 | 16.67 | 301 | 18148 |
| Oliveto Citra | city | Campania | Italy | 40.68 | 15.23 | 830 | 9642 |
| Oliveto Lario | city | Lombardia | Italy | 45.93 | 9.28 | 830 | 10112 |
| Oliveto Lucano | city | Basilicata | Italy | 40.53 | 16.18 | 1669 | 2317 |
| Olivetta | city | Liguria | Italy | 43.88 | 7.50 | 1043 | 4940 |
| Olivo | city | Sicilia | Italy | 37.13 | 14.30 | 65 | 21821 |
| Olivola | city | Toscana | Italy | 44.22 | 10.02 | 295 | 10814 |
| Ollano | city | Liguria | Italy | 44.30 | 8.30 | 1873 | 10516 |
| Ollasta Useddus | city | Sardegna | Italy | 39.79 | 8.86 | 918 | 3911 |
| Ollasta Useddus/Albagiara | city | Sardegna | Italy | 39.79 | 8.86 | 918 | 3911 |
| Ollastra | city | Sardegna | Italy | 39.95 | 8.73 | 193 | 5373 |
| Ollastra Simaxis | city | Sardegna | Italy | 39.95 | 8.73 | 193 | 5373 |
| Ollastra Usellus | city | Sardegna | Italy | 39.79 | 8.86 | 918 | 3911 |
| Ollolai | city | Sardegna | Italy | 40.18 | 9.18 | 2591 | 4726 |
| Ollollai | city | Sardegna | Italy | 40.18 | 9.18 | 2591 | 4726 |
| Ollollai/Ollolai | city | Sardegna | Italy | 40.18 | 9.18 | 2591 | 4726 |
| Olmedo | city | Sardegna | Italy | 40.65 | 8.38 | 219 | 12898 |
| Olmeneta | city | Lombardia | Italy | 45.23 | 10.02 | 147 | 11986 |
| Olmeto | city | Umbria | Italy | 42.98 | 12.32 | 928 | 11278 |
| Olmi | city | Toscana | Italy | 43.87 | 10.98 | 88 | 65306 |
| Olmo | city | Lombardia | Italy | 45.97 | 9.65 | 2509 | 4108 |
| Olmo al Brembo | city | Lombardia | Italy | 45.97 | 9.65 | 2509 | 4108 |
| Oltre il Colle | city | Lombardia | Italy | 45.90 | 9.77 | 3349 | 4116 |
| Oltreacqua | city | Friuli-Venezia Giulia | Italy | 46.52 | 13.64 | 3349 | 7198 |
| Oltressenda Alta | city | Lombardia | Italy | 45.90 | 9.93 | 2509 | 16777 |
| Oltrona di San Mamette | city | Lombardia | Italy | 45.75 | 8.98 | 1095 | 67076 |
| Olzai | city | Sardegna | Italy | 40.18 | 9.15 | 2509 | 3822 |
| Olzano | city | Lombardia | Italy | 45.73 | 10.72 | 265 | 1895 |
| Olàntreghe | city | Veneto | Italy | 46.29 | 12.30 | 1669 | 3524 |
| Olìa Speciosa | city | Sardegna | Italy | 39.28 | 9.53 | 209 | 2645 |