THE ALLYN LAND BRIEF
Land in the
Central Puget Lowland setting.
Allyn CDP has 1.6 square miles of land in Mason County. Its Census reference point is in Central Puget Lowland, within Puget Lowland.
A glacial lowland surrounds Puget Sound with islands, bays, peninsulas and rolling terrain. Moraines, outwash plains and river terraces create a varied setting beneath the region's maritime climate.
Regional context: Puget Lowland ↗ · Classification at the Census reference point
Allyn and Mason County
Allyn is associated with Mason County in the Census boundary data. Start with the parcel’s tax bill to match the property to that jurisdiction, then confirm which government handles its land use.
Allyn by land and water
The Census records 0.06 square miles of water within Allyn, or 3.7% of its total area. It is 5 percentage points lower than the 8.7% recorded for Mason County. This is geographic context; waterfront status and usable land must be checked at the parcel.
For scale, Allyn CDP has 68.1% of the land area of nearby Vaughn CDP (2.35 square miles). These areas describe boundaries, not comparable property prices.

