Charles Lathrop Pack (May 7, 1857 – June 14, 1937), a third-generation timberman, was "one of the five wealthiest men in America prior to World War I".

Growing up on the shores of Lake Huron in Michigan's Lower Peninsula, Charles L. Pack lived in Cleveland, Ohio, from 1871 until the early years of the 20th century.

With investments in timber in the American South, banking and real estate,[1] Pack became a multi-millionaire.

[5] Pack was noted for his collections of postage stamps of New South Wales, New Zealand, Canada, Cape of Good Hope, Spain, Argentina, Uruguay and Brazil.

According to his biographer, Alexandra Eyle, Charles Lathrop Pack "spent $2.8 million on forestry conservation.