The Belle Ainsworth Jenkins Estate, located near Beaverton, Oregon, United States, is listed on the National Register of Historic Places.

The entire 68-acre (28 ha) estate is owned by the Tualatin Hills Park & Recreation District (THPRD).

[4] Belle was the daughter of John C. Ainsworth, a founder of the Oregon Steam Navigation Company, while Ralph had been a teacher.

[2] The English hunting lodge-style main home took three years to complete, and was in addition to the original farmhouse on the property.

[2] Once the project failed due to a lack of water and sewer access, the developers put the estate up for sale.