The Matsi Arboretum () is an arboretum near the Matsi farm in the village of Kehra in Anija Parish, Harju County, Estonia. The arboretum has an area of .
The arboretum was established in 1965 by Olaf Schmeidt, and it has 270 species (more than 360 taxa) of trees and shrubs. The arboretum was made a protected area in 1989.