Juno was a town in Palm Beach County, Florida. Settlement in Juno dated back to at least early 1889, when residents of Dade County, which then stretched from modern-day Martin County to Miami-Dade County, voted for the area to become the county seat. Located at the north end of the Lake Worth Lagoon, Juno soon became the southern terminus of the Jupiter and Lake Worth Railway, which is often referred to as the Celestial Railroad due to its stations at Juno, Mars, Venus, and Jupiter. Juno's status as the seat of Dade County attracted people and businesses to the town, including The Tropical Sun, which became the first newspaper in South Florida.
Described as a small but thriving town in its first few years, growth in the community did not last after Henry Flagler refused to purchase the Jupiter and Lake Worth Railway in the mid-1890s while extending his Florida East Coast Railway (FEC) southward, bypassing Juno. The FEC not only drove the Jupiter and Lake Worth Railway out of business but also shifted economic and population increases to the fledgling communities of Palm Beach and West Palm Beach. Additionally, the Dade County seat returned to Miami in 1899. Juno effectively became abandoned following a 1907 fire that destroyed many buildings and the former townsite is now partially located in present-day North Palm Beach and Palm Beach Gardens.