The Idaho State Arboretum is an arboretum located across the campus of the Idaho State University, Pocatello, Idaho, United States. It is open to the public daily without charge and includes an organized tree walk.
Trees and shrubs in the arboretum include Acer glabrum, Acer negundo, Aesculus hippocastanum, Berberis thunbergii, Betula pendula var. dalecarlica, Buddleja davidii, Celtis occidentalis, Cercis canadensis, Cercocarpus ledifolius, Crataegus oxyacantha, Forsythia intermedia, Fraxinus pennsylvanica, Juglans nigra, Kolkwitzia amabilis, Lonicera tatarica, Magnolia stellata, Mahonia aquifolium, Malus spectablis, Philadelphus lewisii, Picea abies, Pinus edulis, Picea pungens, Pinus mugo, Pinus nigra, Pinus sylvestri, Populus tremuloides, Potentilla fruticosa, Prunus cerasifera, Prunus virginiana, Pyrus calleryana var. Bradford, Quercus robur var. fastigiata, Salix blanda, Syringa, Taxus x media, Thuja orientalis, Ulmus americana, Ulmus glabra var. camperdownii, Ulmus pumila, and Viburnum opulus.