Colcom Foundation is a charitable organization established in 1996 by Cordelia Scaife May, a Mellon family heiress.
The foundation's website indicates principal funding interests reflect a concern for quality of life and environmental sustainability due to rapid population growth.
Grants have supported projects such as the planters throughout Downtown Pittsburgh, recycling hard-to-dispose waste, conservation of Sycamore Island in the Allegheny River, matching funds to activate Pittsburgh’s downtown streets in the Paris to Pittsburgh Project, water quality studies in the Monongahela River, revolving loan fund enabling land trusts to rapidly consummate vital land conservancy projects, Marcellus Environmental Fund to assess and address risks of shale drilling, Mt. Washington land conservation, Tribute to Children monument honoring Mister Rogers, Kids Zone at the Three Rivers Regatta, support for the G-20 in Pittsburgh, completing a bridge for bicyclists on the Great Allegheny Passage near Pittsburgh, curatorial salaries for the Carnegie Museum of Natural History, and matching funds to renovate the fountain at historic Point State Park.
Colcom Foundation has been a large donor to the anti-immigration cause, providing more than $76 million.