Yes, you can absolutely Interrail around Italy, and it is one of the most popular countries for a One Country Pass. Italy's rail network, operated primarily by Trenitalia, is highly efficient and connects major hubs like Rome, Florence, Venice, and Milan with high-speed Frecciarossa trains. However, a key detail for Interrailers is that while the pass covers the "ticket," seat reservations are mandatory for all high-speed (AV) and Intercity trains, usually costing around €10–€13 per journey. Regional trains do not require reservations and allow you to hop on and off freely. In 2026, many Interrail passes are digital via the "Rail Planner" app, and you can even add "Italy Plus" options to include ferry crossings to Greece, making it a versatile tool for exploring the Mediterranean.