Flag of the United States

Jul 4, 1960 | Country flag, Merchant flag, Naval flag, State ensign, State flag, War flag |

...

Libya

Dec 24, 1951 | Country flag, Merchant flag, State ensign |

...

Arab League

Mar 8, 1945 | Country flag, International, Merchant flag, Naval flag, State ensign, State flag, War flag |

...

Võru County (Vorumaa)

Jan 1, 1938 | State / Province |

Vatican City

Jun 7, 1929 | Country flag, Special, State flag, War flag |

Together with Switzerland the only square flag in the world....