Coordinates: 51°11′52″N 3°11′05″W / 51.1978°N 3.1846°W / 51.1978; -3.1846

Lilstock is a hamlet in the civil parish of Stringston within the West Somerset district of Somerset, England. It is 12 miles (19 km) north-west of Bridgwater, and 8 miles (13 km) north-east of Williton. It on the coast of Bridgwater Bay on the Bristol Channel, near the Hinkley Point nuclear power stations.

It was recorded as Lytel-Stoke or Lulestock in the Domesday book, and rendered at one time as Little Stock or Little-stoke. Its name is said to have meant "the stoc [farm] of Lylla and his people".

In 1811 210 acres (0.85 km²) of common land were enclosed as part of the Inclosure Acts.

The Blue Anchor to Lilstock Coast Site of Special Scientific Interest (SSSI) provides an outstanding series of sections through the Early Jurassic Lower Lias, spanning the Hettangian and Pliensbachian stages and named the "Lilstock Formation". This sequence and the good Rhaetian succession beneath are repeatedly affected by faulting, making it of interest to geologists and fossil hunters. It also displays coastal geomorphology which demonstrates a particularly well-developed series of intertidal shore platforms varying in width from about 200-600 m. The cliff and beach are rich in reptile remains, including complete skeletons. Lilstock also yields ammonites, shells and fish remains. A unique specimen of an ichthyosaur, named Excalibosaurus costini MacGowan, in which the lower jaw is shorter than the upper, was found in the Lower Jurassic Sinemurian Stage, Lower Lias beds on the foreshore at Lilstock and is now in the Bristol City Museum and Art Gallery.