[3] The communes of the arrondissement of Nice, and their INSEE codes, are:[2] The arrondissement of Nice is roughly equivalent to the ancient County of Nice, a historical region belonging first to the Duchy of Savoy and then to the Kingdom of Piedmont-Sardinia.

Conquered in 1792 by the armies of the First French Republic, the County of Nice continued to be part of France until 1814; but after that date it reverted to the Kingdom of Piedmont-Sardinia.

[4] After the Treaty of Turin was signed in 1860 between the Sardinian king and Napoleon III as a consequence of the Plombières Agreement, the County of Nice was again and definitively ceded to France as a territorial reward for French assistance in the Second Italian War of Independence against Austria, which saw Lombardy united with Piedmont-Sardinia.

In particular, the arrondissement of Nice was created in 1800 during the first French annexation, disbanded in 1814 after the Treaty of Paris, when its territory returned to the Kingdom of Piedmonte-Sardinia, and restored in 1860 after the aforementioned Treaty of Turin.

[5] As a result of the reorganisation of the cantons of France which came into effect in 2015, the borders of the cantons are no longer related to the borders of the arrondissements.