Robert Hoapili Kekaipukaʻala Baker (c. 1845/1847 – April 4, 1900) was a Hawaiian ali'i (noble), military officer, courtier, and politician who served many political posts in the Kingdom of Hawaii, including Governor of Maui, Privy Councillor and aide-de-camp to King Kalākaua.

Robert Hoapili Baker was born sometime between 1845 and 1847, in Waikapu, on the island of Maui[1] to Malie Napuʻupahoehoe, his mother.

[1][15][16] From October 4, 1886 to August 23, 1888, Hoapili was appointed to succeed John Owen Dominis as Governor of Maui, and the adjacent islands of Molokai and Lanai.

Regarded as a close friend and confidante, Hoapili accompanied the king on his final visit to the United States aboard the USS Charleston, in November 1890.

While visiting Southern California, the king drank excessively and fell ill in January 1891 and had to be returned to San Francisco.

The tearful Hoapili and Macfarlane were at his deathbed at San Francisco's Palace Hotel; he sat at the head of the bed clasping the king's left hand.

The Hawaiian community remember favorably his friendship with Kalākaua and lifelong public service to Hawaii and his death was mourned by his family and friends.

Local newspapers reported that his death "removes a man of distinguished ancestry and considerable public service".

His remains lay in state at the Mililani Hall, his casket draped with the ʻAhu ʻula of his grandmother Kamakahelei,[20] and after a royal funeral befitting his rank, conducted under the rites of the Reorganized Church of Jesus Christ of Latter Day Saints, he was buried at the cemetery of the Kawaiahaʻo Church.

His widow Emma Baker was named sole devisee and executrix of his estate which largely consisted of landholdings in town lots and sugarcane fields around Lahaina on the island of Maui.