Egersund is a town in Eigersund municipality in Rogaland county, Norway. The town is located along the southwestern coast of Norway, about 75 kilometres (47 mi) south of the city of Stavanger. The town is situated along a strait which separates the mainland from the island of Eigerøya. From 1838 until 1964, the town was also an independent municipality.

The 6.79-square-kilometre (1,680-acre) town has a population (2019) of 11,433 and a population density of 1,684 inhabitants per square kilometre (4,360/sq mi).

Egersund has one of the best natural harbours in Norway, and it used to be the largest harbour in Norway when measured in quantity of fish brought in each year (surpassed by Ålesund in 2006). The tidal range, the difference in height between high tide and low tide, is practically zero due to the presence of an amphidromic point. Several internationally known companies have divisions here, like Navico (earlier Robertson autopilots) and Jeppesen Norway formerly C-MAP Norway (producer of electronic sea-maps). In addition, the Aker Solutions corporation owns and runs a large installation here which specializes in the building of parts for oil platforms. Most of the industry is related to the sea and to boats.

People have lived around the area of Egersund since the Stone Age. There are several places around Egersund where one can find ruins of settlements dating back to the age of migrations in Norway (400–600 BC).

There used to be a church here, the Church of St. Mary, mentioned in 1292 in a privilege of indulgence issued in Rome on 5 February 1292 by Pope Nicholas IV as Ecclesia beatæ Mariæ de Eikundarsund. It was the first church in Egersund, and was the parish church of the St. Mary parish. It is believed to have been located where the present Egersund Church stands today. Old folklore from Egersund also says that before the Church of St. Mary, an altar where people sacrificed to the old Norse gods was placed here, but this has not been verified from any sources except old stories.

There was also a chapel, the chapel of St. Laurenti, mentioned in a letter issued on 5 February 1308 as Ecclesia beati Laurentii de Eikundarsund, where Pope Clement V gives King Håkon V Magnusson extensive privileges concerning the King's 14 chapels (including the chapel of St. Laurenti), which was founded by himself or his father, King Magnus Lagabøte, and his grandfather, King Håkon Håkonson. Since these chapels often were built on the king's estates, it is presumed to have been on grounds owned by the Husaby estate. An old tradition says it was located at what is now "Strandgata 43", but the exact position is somewhat uncertain.

In 1623 the old church (probably the Church of St. Mary) was demolished and a new Egersund Church was erected. This building still stands today.

On 18 July 1798, the village of Egersund was established as a ladested with its own customs office.