Hvaler is a municipality that is a group of islands in the southwestern part of Østfold county, Norway. The administrative centre of the municipality is the village of Skjærhalden, on the island of Kirkeøy. The only police station in the municipality is located in Skjærhalden. Hvaler was established as a municipality on 1 January 1838 (see formannskapsdistrikt).

The name is the plural form of hval which means "whale". The form and shape of the islands are resembling a pod of whales. Prior to 1889, the name was spelled Hvaløerne.

The coat-of-arms is from modern times. They were granted on 9 December 1983. The arms show a silver-colored boat on a blue background. This boat is the type that was typical in the 13th century. This was chosen since this island municipality has been dependent on boats for all its history, and because fisheries and sailing have been the main economic activities for many centuries.

Hvalerdrakten is the traditional costume or bunad for women in Hvaler. The bodice and skirt are blue or black and are made from 100% wool. The shirt is white and made from 100% cotton. There are several symbolic expressions in the embroideries and the accompanying silver brooches. The embroidered flowers are characteristic to the islands' flora and symbolize the different islands that constitute the municipality. All the silver that belongs to the costume is portraying the locally famous Hvalerbåten (The Boat of Hvaler) and herring, which has been an important commodity to the islands through the ages. All patterns used in this costume have been patented. Since 1999 hvalerdrakten have been manufactured by Hvalerdraktstua AS.

Hvaler Church (Hvaler Kirke) is a medieval era church, probably begun about ca. 1000-1100. Hvaler Church is the main church of the archipelago. It is located on Kirkeøy in the extreme south of the parish. It is a stone church with a rectangular nave and narrow choir and apse. The pulpit is from the 1600s. In 1750 the church received a new altar which in 1759 was supplemented with an altarpiece mounted on the altar. Between 1953 and 1955 the church went through a thorough restoration led by antiquarian Håkon Christie in connection with the church's restoration. The J. H. Jorgensen organ is from 1955.

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