While there are some remnants of prehistoric activity, Malahide is known to have become a persistent settlement from the coming of the Vikings, who landed in 795, and used Malahide Estuary (along with Baldoyle) as a convenient base.

With the arrival of the Anglo-Normans, the last Danish King of Dublin retired to the area in 1171. From the 1180s, the history of the area is tied to that of the Talbot family of Malahide Castle, who were granted extensive lands in the area and over the centuries following developed their estate, and the small harbour settlement.

By the early 19th century, the village had a population of over 1000, and a number of local industries, including salt harvesting, while the harbour continued in commercial operation, with landings of coal and construction materials. By 1831, the population had reached 1223. The area grew in popularity in Georgian times as a seaside resort for wealthy Dublin city dwellers. This is still evident today from the fine collection of Georgian houses in the town and along the seafront, and Malahide is still a popular spot for day-trippers, especially in the summer months.