Portland's Downtown District Portland's Downtown District (PDD) is a not-for-profit 501c(4) organization founded in 1992. It is funded by a tax assessment on property within the boundaries of the District. All property owners and tenants are considered members of Portland's Downtown District. The mission of Portland's Downtown District (PDD) is to act as a leader and facilitator in the support and promotion of the economic vitality of downtown Portland. Click here for a staff listing Click here for the list of Board of Directors Click here to contact us