Mellat Park (Pârk-e Mellat) is a park in Tehran, the capital city of Iran.

Known as the Shahanshahi Park (Imperial park) prior to the revolution of 1979, it is the largest recreation area in the Tehran.[citation needed] It is situated at the foot of the Alborz mountains adjacent to the famous Valiasr Avenue in the east, extending to the Parkway (chamran) and Seoul Street to the west. The park lies south of the Tehran International Fair grounds and Enghelab golf resorts. It has pathways for walking and shade for picnics and relaxation as well as facilities such as boat rental on the lake, skating lanes, snack bars, coffee shops, and a small bird zoo. There is a horseracing club adjacent to the park and horseracing meetings are held at the Mellat Park. Mellat Park is watered by the winter-snow streams coming down from Mt. Tochal close to 4,000 m high.