| Handayama Botanical Garden | |
| Native Name: | 岡山市半田山植物園 |
| Type: | Botanical garden |
| Location: | Kita-ku, Okayama, Japan |
| Coordinates: | 34.6917°N 133.9319°W |
The is a botanical garden located at 2-1319 Kitagata, Kita-ku, Okayama, Japan. It is open daily except Tuesdays; an admission fee is charged.
The garden was founded in 1953 on a hillside site overlooking the city by the Okayama Waterworks. It was remodeled and reopened under its present name in May 1964. The park covers an area of 110000m2, and has 150,000 plants of 3,200 species blooming throughout the four seasons, including good collections of camellias and maples. Near the summit is the Ipponmatsu Kofun, an ancient burial mound