珊瑚海島同性戀王國成立於2004年6月,是由澳大利亞昆士蘭州一群抗議澳大利亞拒絕承認同性婚姻合法性的同性戀建立的。他們租用了一艘名為“同志之花”(Gayflower)的船,選擇了珊瑚海群島作為他們的基地,選擇了珊瑚海群島的主島——卡托島作為他們私人國家的領土。抗議者的領導人戴爾·安德森(Dell Anderson)宣布為王國的君主,稱為戴爾·安德森一世(Dell Anderson I),目前,島上除了抗議者居住之外,並無其他人定居。該王國也沒能得到澳大利亞或者世界上其他任何一個國家的承認。在島上居民逐漸蔓延到卡托島周圍一些小島之後,戴爾·安德森一世還建立了一個高級法院,並任命了一個首席大法官。
“Homosexual people have honestly endeavoured everywhere to merge ourselves in the social life of surrounding communities and to be treated equally. We are not permitted to do so. In vain we are loyal patriots, our loyalty in some places running to extremes; in vain do we make the same sacrifices of life and property as our fellow citizens; in vain do we strive to increase the fame of our native land in science and art, or her wealth by trade and commerce. In countries where we have lived for centuries, we are still cried down as strangers.... In the world as it is now and for an indefinite period.... I think we shall not be left in peace.”