Jesolo or Iesolo is a seaside resort town and comune in the Metropolitan City of Venice, Italy of 26,776 inhabitants. With around six million visitors per year, Jesolo is one of the largest beach resorts in the country, and ranks 7th overall as a tourist destination, and fourth (behind Rimini, Cavallino-Treporti, San Michele al Tagliamento/Bibione) most popular Italian seaside resort. With 204,711.4 visits per thousand inhabitants, it is also one of the 50 Italian towns with the greatest tourist pressure. Its 15 kilometre long beaches and proximity to central Europe make it a favourite destination of many German, Austrian, Dutch and French visitors.

The town lies north of Venice, between Eraclea and Cavallino-Treporti. Jesolo gives its name to a lagoon of 22 square kilometres (8.5 sq mi) on the Adriatic Sea between the rivers Sile and Piave. The urbanized area lies on an island of sorts, delimited by the rivers Piave (on the east) and Sile (on the west), and an artificial canal called Cavetta, which starts from the center of Jesolo and goes towards Cortellazzo.

The Jesolo area stretches along the Venetian coast on a flat landscape overlooking the Adriatic Sea and edged by Jesolo's own lagoon (22 km), and by the rivers Sile and Po. This latter is edged by the opposite Laguna del Mort. The valley of Dragojesolo together with that of Grassabò,is the largest in the northern lagoon of Venice. The coastal strip is low and sandy, consisting of an uninterrupted beach about 12 kilometres long and varying in thickness between 30 and 100 metres.