Hiouchi (Tolowa: Xaa-yuu-chit)[3] is a census-designated place[4] in Del Norte County, California.

It is located on the Smith River 7.5 miles (12 km) east-northeast of Crescent City,[5] at an elevation of 171 feet (52 m).

Hiouchi has a warm-summer mediterranean climate (Csb) typical of coastal California with moderate temperatures year-round consisting of mild to warm summers and cool, very rainy winters.

The filming of the Ewoks portion of Return of the Jedi was at Jedidiah Smith State Park just west of Hiouchi.

[12] Federally, Hiouchi is in California's 2nd congressional district, represented by Democrat Jared Huffman.