The Regional Parks Botanic Garden is a 10-acre (4 hectare) botanical garden located in Tilden Regional Park in the Berkeley Hills, east of Berkeley, California, in the United States. It showcases California native plants, and is open to the public. The garden was founded on January 1, 1940.

Notable specimens include nearly all the state's conifers and oaks, a very good collection of wild lilacs (Ceanothus species), perhaps the most complete collection of California manzanitas anywhere, expanding collections of Californian native bunchgrasses and aquatics, and representatives of some 300 rare and endangered vascular taxa of California. The garden is organized into sections, each representing a distinctive natural area in California:

with subsections:

Collected plants include:

37°53′36″N 122°14′37″W / 37.8933°N 122.2436°W / 37.8933; -122.2436