The International Concatenated Order of Hoo-Hoo is a fraternal and service organization of people involved in the forests products industry. The organization was formed on January 21, 1892, in Gurdon, Arkansas by six men with connections to the lumber industry.

The term "hoo hoo" referred to a lumberman. A monument in Atlanta's Piedmont Park commemorates the planting of trees by the Atlanta chapter of the Hoo Hoo Club.