Joemma Beach State Park, Marine state park on Key Peninsula in Pierce County, United States.

Joemma Beach State Park is a coastal park covering about 122 acres with over 3,000 feet of shoreline along Puget Sound on Key Peninsula. The property offers camping spots, restroom facilities, and a dock for boaters and fishing enthusiasts.

Joemma Beach State Park was established in 1961 on the southeast shore of Key Peninsula, in Pierce County, Washington. The park covers 49 hectares and includes 910 metres of saltwater frontage on Puget Sound. Its name honours Joe and Emma Smith, early owners of the land.

The park's name honors Joe and Emma Smith, who lived on the land from 1917 to 1932; "Joemma" combines their first names. Visitors today come for crabbing, waterskiing and beachcombing along the saltwater frontage, and the dock and shoreline serve boaters and anglers from the surrounding Key Peninsula communities.

Visitors need a Discover Pass to drive into the park and will find tent camping spots, outdoor toilets, and a dock for boats. Parking is generally easy, and the area is open year-round, though warmer months tend to draw more people.

Joemma Beach State Park was established in 1961, and its 3,000 feet of saltwater frontage on southeast Key Peninsula support crabbing, waterskiing and beachcombing as well as camping. The park covers 122 acres in Pierce County on Puget Sound.