The Flag of the Great Socialist People's Libyan Arab Jamahiriya was a plain green flag.
The Flag of Saudi Arabia has a field of green, which represents Islam.
Irish nationalism was traditionally represented with a green flag. The current flag of Ireland is a tricolour with green representing the Irish Catholics, orange representing the Irish Protestants, and white in the middle to represent peace.
The Flag of Mauritania.
Other
A green flag is part of a set of racing flags and indicates the beginning or resumption of an auto race.
