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​​Arbor Day Foundation’s national network of nonprofit organizations, municipalities, urban forest councils and individuals devoted to the hands-on work of planting and caring for trees in cities and towns.


​​A national conservation organization whose commitments include building vibrant cities through urban forests and greenspace. They partner with city leaders and community groups, develop science-based action plans, advocate for and fund urban forestry, implement planting projects and build public awareness. The website also contains the register of the largest living specimens of American trees, The Official Register of Champion Trees.

Register website​​ ​​

​The largest non-profit membership organization focused on planting trees both nationally and internationally. ADF has many tree and urban forestry-related programs, including Tree City USA, Tree Campus USA, Tree Line USA and Community Tree Recovery. ADF is the host of the annual Partners in Community Forestry (PCF) conference, the largest international gathering of urban forestry practitioners, advocates, researchers, and government leaders

PCF website​​​​ ​



​A nationally recognized grassroot non-profit, Friends of Trees strives to make it fun and easy for cities and volunteers to reforest natural areas and plant street and yard trees in the Portland area, Salem, Eugene and southwest Washington.


​​Through research, technology, and education, the ISA promotes the professional practice of arboriculture and fosters a greater worldwide awareness of the benefits of trees. ISA exists so that professionals, allied professionals, public officials, and consumers worldwide recognize the economic, environmental, and societal benefits and values of trees and their care at a cost that demonstrates the wise stewardship of resources.



​OCT is Oregon’s urban and community forestry advisory council. It’s mission is to promote healthy urban and community forests through leadership, education, awareness, and advocacy. OCT co-hosts Oregon’s annual urban forestry conference; recognizes individuals and organizations for outstanding work on behalf of urban trees; and provides small grants to help boost community celebrations of Oregon Arbor Week.


​A program of the Oregon Travel Information Council (OTIC), officially recognizing Oregon trees that hold state historical significance. The website also contains a directory of city and county heritage tree programs.


​From improving air and water quality, to advancing human health and safety, to promoting economic development and social equity, SUFC is a powerful urban forestry lobbying organization whose mission is to convene and mobilize its diverse member network to foster thriving communities through healthy urban and community forests.


​ provides the public with educational information about the benefits of trees and how to properly care for trees in the urban environment.​​


​​An organization that works to ensure large-form, long-lived trees in Portland reach their full maturity by inspiring action to protect these trees and space for them.


​Designed to help guide city managers, policymakers and advocates in building effective urban forest programs, this website contains the latest research and best practices for implementing urban forestry projects in your community. A joint project of the US FS, American Forests and the National Association of Regional Councils.