Pesaro (ˈpeːzaro; Pés're) is a city and comune (municipality) in the Italian region of Marche, capital of the Province of Pesaro e Urbino, on the Adriatic Sea. According to the 2011 census, its population was 95,011, making it the second most populous city in the Marche, after Ancona. Pesaro was dubbed the "Cycling City" (Città della bicicletta) by the Italian environmentalist association Legambiente in recognition of its extensive network of bicycle paths and promotion of cycling. It is also known as "City of Music" (Città della musica), for it is the birthplace of the composer Gioacchino Rossini. In 2015 the Italian Government applied for Pesaro to be declared a "Creative City" in UNESCO's World Heritage Sites. In 2017 Pesaro received the European City of Sport award together with Aosta, Cagliari and Vicenza.
Local industries include fishing, furniture making and tourism. In 2020 it absorbed the former comune of Monteciccardo, now a frazione of Pesaro. Its frazione of Fiorenzuola di Focara is a member of the I Borghi più belli d'Italia ("The most beautiful villages of Italy") association.
The city was established as Pisaurum by the Romans in 184 BC as a colony in the territory of the Picentes, the people who lived along the northeast coast during the Iron Age. In 1737, fourteen ancient votive stones were unearthed in a local farm field, each bearing the inscription of a Roman god; these were written in a pre-Etruscan script, indicating a much earlier occupation of the area than the 184 BC Picentes colony.
A settlement of the Picentes tribe has been found at Novilara. The northern Picentes were invaded in the 4th century BC by the Gallic Senones, earlier by the Etruscans, and when the Romans reached the area the population was an ethnic mixture. The Roman separated and expelled the Gauls from the country.
Under the Roman administration Pesaro, a hub across the Via Flaminia, became an important centre of trading and craftmanship. After the fall of the Western Empire, Pesaro was occupied by the Ostrogoths, and destroyed by Vitigis (539) in the course of the Gothic War.