Major Charles Frost (1631–1697) was an English-born military leader in Maine during King William's War.

Frost was born in Tiverton, Devon, England. He married Mary Bolles in 1660.^[1] They had a daughter, Sarah Frost, born in 1666.^[2]

Frost was stationed in Kittery, Maine (present-day Eliot, Maine). He was the highest-ranking military leader in Maine during King William's War until he was killed by Indians, along with a number of other local residents at Ambush Rock. He was reportedly killed for his role in Richard Waldron's subterfuge against several hundred Indians during King Philips War.^{[citation needed]}

Aggrieved natives never forgot. According to Everett Stackpole's "Old Kittery and Her Families":^[3]

The night after Frost's burial the Indians opened his grave, took out the body, carried it to the top of Frost's hill and suspended it upon a stake. His resting place was marked some years later with a flat stone, on which is a rudely chiseled inscription, "Here lyeth intrrd ye body of Mj. Charles Frost ager 65 years Decd July ye 4th 1697." The spot where he was slain is near a large boulder, on which is a suitable inscription. It is known as Ambush Rock.

On 4 July 1897, the newly formed Eliot Historical Society held a commemoration ceremony as their first public event, marking the 200th anniversary of the natives' killing of Frost.^[4]

Charles Frost was the 5th great-grandfather of American poet Robert Frost.

• Namesake of Frost Hill, Eliot, Maine (Natives dug up Frost's body and hoisted it upon a pole at the top of Frost's Hill)^[5]
• Honored on a plaque at Ambush Rock in Eliot, where he died in an Indian attack^[6]

• Winthrop Hilton
• Richard Waldron