Vercelli (Italian: [verˈtʃɛlli] ; Piedmontese: Vërsèj [vərˈsɛj]) is a city and comune (municipality) of 46,552 inhabitants (January 1, 2017) in the Province of Vercelli, Piedmont, northern Italy. One of the oldest urban sites in northern Italy, it was founded, according to most historians, around 600 BC.

The city is situated on the Sesia River in the plain of the Po River between Milan and Turin. It is an important centre for the cultivation of rice and is surrounded by rice paddies, which are flooded in the summer. The climate is typical of the Po Valley with cold, foggy winters (0.4 °C (33 °F) in January) and humid heat during the summer months (23.45 °C or 74 °F in July). Rainfall is most prevalent during the spring and autumn; thunderstorms are common in the summer.

The languages spoken in Vercelli are Italian and Piedmontese; the variety of Piedmontese native to the city is called Varslèis.