Jupiter is a town situated in Palm Beach County, Florida, within the United States. It holds the distinction of being the northernmost municipality in Palm Beach County and forms the northernmost part of the Miami metropolitan area alongside the adjacent village of Tequesta. Located along the Atlantic coast of South Florida at the mouth of the Loxahatchee River, the town is bordered by the Atlantic Ocean to the east, Martin County to the north, unincorporated Palm Beach County to the west, and Juno Beach to the south.

The area has been inhabited for thousands of years, originally by Indigenous peoples such as the Jaega tribe. The name Jupiter originated from a mistranslation of the Spanish name Jobe, derived from the Indigenous name Hobe, which mapmakers later misunderstood as referring to the Roman god. Permanent American settlement began in the 19th century with the construction of the Jupiter Inlet Light in 1860. Growth was further encouraged by the arrival of Henry Flagler's Florida East Coast Railway in the 1890s and subsequent highway development throughout the 20th century.

The town is connected to the Intracoastal Waterway through the Indian River Lagoon, which reaches its southern terminus at the Jupiter Inlet. The Jupiter Inlet Lighthouse, completed in 1860, serves as an important maritime landmark and symbol for the community. The area features a unique geographical location that extends further into the Atlantic Ocean than any other point on the Florida coast. Nearby landmarks include Dubois Park, where visitors can watch breakers crash into the inlet, and the historic DuBois Pioneer Home.

Jupiter is known for its lush landscaping and tropical trees, with humid summers and mild, dry winters defining its two basic seasons. The town offers various recreational activities, including diving at the Jupiter Dive Center, which provides charters to the third-largest reef system in the world. Visitors can also attend spring training baseball games at Roger Dean Stadium, which hosts major league teams during February and March. The area is famous for marine life, including annual Goliath Grouper aggregations and turtle sightings.

According to the 2020 US Census, the town had a population of 61,047. It is located approximately 84 miles north of Miami and 15 miles north of West Palm Beach. Access is facilitated by Palm Beach International Airport, located just 20 minutes away, and major roads including Interstate I-95 and U.S. Highway 1. The town experiences a trade-wind Tropical rainforest climate, with daily thundershowers common during the hot season from May through October.