Grimestad is a village in Færder Municipality in Vestfold county, Norway. The village is located on the island of Tjøme, about 3 kilometres (1.9 mi) to the northeast of the village of Tjøme, about 1 kilometre (0.62 mi) to the north of the village of Hulebakk, about 4 kilometres (2.5 mi) to the southeast of the village of Sundene, and about 1.5 kilometres (0.93 mi) east of the village of Svelvik.

The village of Grimestad and the surrounding countryside had a population (in 2007) of 280 people. The village of Grimestad is considered to be a part of the urban settlement of Tjøme, which covers the central part of the island. The 2.51-square-kilometre (620-acre) urban area has a population (2023) of 2,879 and a population density of 1,146 inhabitants per square kilometre (2,970/sq mi).