Wellington R. Burt (August 26, 1831 – March 2, 1919) was an American lumber baron from Saginaw, Michigan. At the time of his death, his wealth was estimated to be between $40 and $90 million (between $625 million and $1.41 billion in 2021 dollars). For a time in the early 1900s, Burt ranked as one of the eight wealthiest men in the United States. He was best known for his lumber mills and timber holdings, but was also involved in iron mining, railroads, salt mines, and finances. Burt was a politician, holding the offices of Mayor of East Saginaw (1867–68) and member of the Michigan Senate (1893–94). In his final years, he lived alone in a mansion with his servants. Estranged from friends and family and nicknamed "The Lone Pine of Michigan", he officially died of "senility" at age 87.