The French Riviera is hardly short of accommodation options - from boutique hotels to package holiday destinations and everything in between. With all-but-guaranteed good weather, too, camping is a real option if you’re visiting this corner of France for a game or two.
According to the host city organisers, it has the second largest capacity for visitors out of all the host cities, which is reassuring to know. The Tourist Office has a searchable database of the city’s acommodation, which will show you what’s available in your budget - http://en.nicetourisme.com/accommodation
If you’re unable to find anything in Nice for the time you’re visiting, however, there are plenty of options along the Cote d’Azur, including Saint Tropez, Cannes, Antibes and even Monte Carlo. You could equally nip across the border in to Italy in the likes of Sanremo, at a push.
Uefa also has an official accommodation partner - HomeAway (www.homeaway.co.uk/euro2016/) which works on a similar basis to Airbnb, offering flats, apartments and houses in and around host cities. Their search function splits properties between each host city, making it easy to use.