Frick is a municipality in the district of Laufenburg in the canton of Aargau in Switzerland.

At the nearby Wittnauer Horn, a prehistorical fortification was discovered with objects dating back to the Late Bronze Age. A Roman villa was located at the site of the later village in the 2nd century, and a small Roman fort was built in the early 4th century to protect the military road from Vindonissa to Augusta Raurica (extended in AD 370). A Roman settlement developed in the vicinity of the fort, replaced by an Alemannic settlement during the 6th to 9th centuries. The Alemannic settlement had a fortified church, the foundations are still visible near the current village church. The name of the village was taken from that of the encompassing region of Frickgau (mentioned as Frichgowe in 926), from a Vulgar Latin [regio] ferraricia, in reference to the iron mine located here in the Roman era (a formation based on Latin ferraria "iron mine" with the -icius suffix), whence early Romance *Ferrícia, Old High German *Ferríkkea, recorded as Fricho in the 11th century.

Starting in the High Middle Ages, Frickgau was owned by the Counts of Homberg-Thierstein. Later, around 1230, it passed to the House of Habsburg, and was overseen by Habsburg ministeriales, known as the lords of Frick, with Gipf, Upper Frick part of Oeschgen, forming the Frick bailiwick (Vogtei) (also called the Homburgeramt). The Homburger Vogt (reeve) was also chief administrator the Fricktal region. The bailiwick was granted special privileges, including the right to elect their reeve, as well as the rights of lower jurisdiction.

The population of the bailiwick were divided into the upper layer of Vollbauern ("full farmers"), as well as in the Halbbauern ("half-farmers", i.e. smallholding farmers) and the Taun (tenants). The Vollbauern included the reeve's family, and were the most privileged. The tenants formed the lowest stratum, with no citizen rights, and represented the largest group numerically in the early modern period.

After the Act of Mediation in 1803, Frick and the rest of the modern Fricktal became part of the newly formed Canton of Aargau. In 1804 the municipalities of Frick and Gipf-Frick were formed. In 2007 a major dinosaur graveyard was discovered in Frick. Some of the bones, including a complete Plateosaurus, are now on display in the Sauriermuseum.

The Church of St. Peter and Paul were probably built as a private church for the Counts of Homberg during the High Middle Ages. In the Thirty Years War, the village was destroyed together with the church. In the mid-14th century the church came under the authority of Steinen Convent in Basel. Then, in 1492 it was granted to Teutonic Knights at Beuggen. The present baroque building is from 1716, and the reformed church is from 1910. The reformed parish comprises ten municipalities and the parish offices are in Frick and Gipf-Oberfrick. The catholic parish, consisting of Frick and Gipf-Oberfrick, has been a separate parish since 1953.

The municipal coat of arms, Argent a Wolf salient Gules, was introduced in 1931 based on the historical coat of arms of the Habsburg ministeriales. Before 1931, Frick had used the coat of arms of Fricktal, a green linden leaf in a white field.

In 2013 and 2014 it became the Swiss municipality with the highest crime rate, due to the several thousand offences registered in the context of the improper trading case involving ASE Investment, a company with official seat in Frick.

During the upper Triassic period, the region around Frick was a dry lowland with flat hills and small depressions. During the rainy season, the depressions filled with water and dinosaurs congregated around the ponds. When they died, their bodies were covered by the mud in the ponds and fossilized, creating rich fossil beds in Frick. The first Plateosaurus fossils were discovered in 1961 and further excavations during the following decades have discovered numerous fossils. In 2006, the only coelophysoidean (a small-sized flesh-eating dinosaur group) fossil in Switzerland, was found by an amateur paleontologist in Frick, in 2019 named Notatesseraeraptor.