Bona Sforza (born February 2, 1494 - November 19, 1557) was a queen of Poland and a second wife of Sigismund I of Poland since 1518.

Bona was born in Vigevano, the daughter of Gian Galeazzo Sforza of Milan and niece of Bianca Maria Sforza, who in 1493 had married Maximilian I. Bona, the niece of the empress, was a patron of Renaissance culture, which began to flourish in Poland. She is also considered one of the mothers of modern Polish cuisine since she became famous for introduction of Italian vegetables to Polish tables.

She died in Bari, Italy.

See also:

• List of Polish rulers
• Polish cuisine