The green circle (Ukrainian: Зелене коло, romanized: Zelene kolo; Russian: Зелёное кольцо, romanized: Zelyonoye koltso) is a regional nature reserve (zakaznik) located in Crimea, a territory internationally recognised as part of Ukraine but occupied by Russia since 2014.

Including pine, ash, maple, and honey locust trees, among others, the green circle was established as a reforestation initiative on the relatively treeless Pontic–Caspian steppe.

[1] On 20 May 1980, the Cabinet of Ministers of the Ukrainian SSR recognised the green circle as a regional nature reserve.

[2] The Tavrida Highway is located 3 km (9,800 ft) from the green circle, a development which has caused environmental concerns.

According to plans, green corridors will be provided for to prevent environmental destruction caused by the Tavrida Highway's construction.