The Leila Arboretum is an arboretum and garden located at 928 West Michigan Avenue, Battle Creek, Michigan. The arboretum covers 72 acres and is open to the public.

The Arboretum’s collections include nearly 1,700 officially recorded woody plants and about 25,000 total plants, including trees, shrubs, and flowers arranged in the style of European gardens. Many of the plants were added in the 1920s. Recently, the Arboretum has worked to increase the variety of woody plants and create demonstration gardens, such as a lilac garden, perennial walkway, native plant garden, and labyrinth. Perennial gardens include plants like daylilies, purple coneflowers, and daisies. Annual flower displays feature around 7,000 spring bulbs, such as tulips and daffodils, as well as about 5,000 annual flowers and 1,500 chrysanthemums. The Kingman Museum, a natural history museum and planetarium, is also located on the Arboretum’s grounds.

The Leila Arboretum was established in 1922 when Leila Post Montgomery, the widow of C. W. Post, a breakfast cereal business leader, bought 72 acres (291,000 square meters) of an old country club and gave the land to the City of Battle Creek to be used as a public arboretum. This gift was part of a larger plan by Edward M. Brigham to create an educational campus with a museum, a historical building for the Battle Creek Historical Society, a fine arts building, a music hall, and a lecture hall. Additional land was donated by Mrs. Charles E. Kolb, W. I. Fell, and Burritt Hamilton. The combined property, named the Leila Arboretum, was designed and developed by T. Clifton Shepard between 1924 and 1930. However, the Great Depression caused the gardens to fall into disrepair. In 1982, a group of volunteers formed the Leila Arboretum Society and successfully restored the gardens, which had been hidden under overgrown vegetation for many years.