Sakunothayan Botanical Garden () is a botanical garden in Wang Thong District, Phitsanulok Province, northern Thailand. The park, at kilometer 33 of Phitsanulok-Lomsak Road, has 164 species of plants.
In 1955, "Wang Nok Aen Forest park" was established with a total area of approximately . Royal Forest Department changed its name to "Sakunothayan Forest Park" in 1958 and to "Sakunothayan Arboretum" in 1961.<br> On 4 February 2018 Department of National Parks, Wildlife and Plant Conservation upgraded it to "Sakunothayan Botanical Garden".
Wang Nok Aen or Sakunothayan Waterfall, within the arboretum, is a elevation drop of the Wang Thong River.