Liliʻuokalani is proclaimed the last monarch and only queen regnant of the Kingdom of Hawaii.

Queen Liliʻuokalani was the only queen regnant and the last sovereign monarch of the Hawaiian Kingdom, ruling from January 29, 1891, until the overthrow of the Hawaiian Kingdom on January 17, 1893. The composer of "Aloha ʻOe" and numerous other works, she wrote her autobiography Hawaiʻi's Story by Hawaiʻi's Queen (1898) during her imprisonment following the overthrow.

A queen regnant is a female monarch, equivalent in rank, title and position to a king. She reigns suo jure over a realm known as a kingdom; as opposed to a queen consort, who is married to a reigning king; or a queen regent, who is the guardian of a child monarch and rules pro tempore in the child's stead or instead of her husband who is absent from the realm, be it de jure in sharing power or de facto in ruling alone. A queen regnant is sometimes called a woman king. A princess, duchess, or grand duchess regnant is a female monarch who reigns suo jure over a principality or (grand) duchy; an empress regnant is a female monarch who reigns suo jure over an empire.

The Hawaiian Kingdom, also known as the Kingdom of Hawaiʻi, was an archipelagic country from 1795 to 1893, which eventually encompassed all of the inhabited Hawaiian Islands. It was established in 1795 when Kamehameha I, then Aliʻi nui of Hawaii, conquered the islands of Oʻahu, Maui, Molokaʻi, and Lānaʻi, and unified them under one government. In 1810, the Hawaiian Islands were fully unified when the islands of Kauaʻi and Niʻihau voluntarily joined the Hawaiian Kingdom. Two major dynastic families ruled the kingdom, the House of Kamehameha and the House of Kalākaua.

January 29 is the 29th day of the year in the Gregorian calendar; 336 days remain until the end of the year.