The town has a population of 23,501(1 January 2017), and is an important traffic portal with its ferry connections to Gothenburg in Sweden and Oslo in Norway. The town is well known for fishing, and its fishing and industrial harbours.
Frederikshavn's oldest building, Fiskerklyngen, is originally from the mid-16th century, but the houses now there are from 18th–19th centuries.
Frederikshavn was originally called Fladstrand (lit. "Flat beach"), until 1818 when it received status as a merchant town under the name of Frederikshavn, after King Frederik VI.
Due to its advantageous proximity to the entrance to the Baltic Sea, Frederikshavn has historically been a naval base of some strategic importance. Peter Tordenskjold barricaded himself here in the fortress that German troops had already built in the 17th century. During the Great Northern War the Battle of Fladstrand was fought in the nearby sea between Swedish and Danish naval forces.
The only old military installations remaining to this day are the Gunpowder Tower (Krudttårnet), constructed in 1688, and the Northern Entrenchment (Nordre Skanse). The Gunpowder Tower has been preserved, and is incorporated in the municipality's coat-of-arms.
Companies in the area include MAN/BW Alpha, Martin, and the Navy Base Frederikshavn (Flådestation Frederikshavn), which is the home location for the training ship Danmark, the national icebreakers, and the royal yacht Dannebrog.
Frederikshavn, like the rest of North Jutland, was hit with hard unemployment. The town's largest workplace, the shipyard Danyard, closed in the late 1990s. This resulted in more than 2,000 workers being unemployed. Today there is still activity at the large ship building area, with many small companies renting space there. In summer 2008, the unemployment rate, like the rest of Denmark, fell to a minimum low record of approximately 2%.
As with many provincial municipalities around the world, some of its young people leave to large urban cities. However, the municipality is currently engaged in many innovative projects which are attracting tourists and aim to retain population.
Frederikshavn is currently beginning a transition to make it the first medium-sized city/large town in the world to rely exclusively on renewable energy resources for power, including transportation and cars. The process is expected to be completed by 2030. As of 2010, the city was powered 18% by renewable energy.
The Danish term "frederikshavner" (lit. "Someone from Frederikshavn") is used to denote a quality plaice, probably the most popular fish eaten in Denmark.Bangsbo Museum
Frederikshavn Art Museum (Frederikshavn Kunstmuseum)
Frederikshavn Shipyard Historical Society (Værftshistorisk Selskab Frederikshavn)
Tordenskiold Festival, celebrated since 1998.
Lighting Festival, biannual festival.
, Bangsbo Flower Festival
, Bangsbo Fort
, Bangsbo Botanical Garden
Frederikshavn White Hawks are the local professional ice hockey team playing in the premier Danish ice hockey league, Metal Ligaen.
Frederikshavn is served by Frederikshavn railway station. It is the terminal train station of the Vendsyssel and Skagen railway lines and offers direct InterCity services to Copenhagen, regional train services to Aalborg and local train services to Skagen.
Frederikshavn is the northern end of E 45 in Denmark.
Ferry service operated by Stena Line connects the town of Frederikshavn to the city of Oslo in Norway, Göteborg, in Sweden and to Læsø.
The town has a number of harbours/marinas (listed in order from north to south):Rønner Harbour (Rønnerhavn): pleasureboat, dinghy and fishing harbour
Northern Entrenchment Harbour (Nordre Skanse Havn): dinghy harbour
Frederikshavn Harbour (Frederikshavn Havn): commercial harbour
Naval Harbour (Flådehavn): national warships, icebreakers, royal yacht and training ships
Sea Sports Harbour (Søsportshavn): pleasureboat, dinghy and houseboat harbour
Neppen's Harbour (Neppens Havn): dinghy harbour
EUC Nord - a technical school located partly in Frederikshavn.
Christian Henrik Arendrup (1837–1913) Governor-General of The Danish West Indies 1881 to 1893
Karl Bovin (1907–1985) painter, key member the Odsherred Painters
Gustaf Nielsen (1910–1973) sports shooter, competed in the 1948 Summer Olympics
Elsa Gress (1919–1988) essayist, novelist and dramatist
Jørgen Rømer (1923–2007) art historian, graphic artist and painter
Harald Nielsen (1941–2015) former footballer
Allan Olsen (born 1956) pop musician
Allan Søgaard Larsen (born 1956) CEO of Falck A/S
Henrik I. Christensen (born 1962) roboticist
Connie Nielsen (born 1965) actress
Peter Møller (born 1972) former footballer
Søren Frederiksen (born 1972) football coach. former footballer
Lotte Kiærskou (born 1975) former handball player, double olympic gold winner in 2000 and 2004
Gitte Aaen (born 1981) former handball player
Ditte Ejlerskov (born 1982) contemporary artist
Mads Christensen (born 1984) professional ice hockey player
Lucas Bjerregaard (born 1991) golfer
Nicolai Meyer (born 1993) professional ice hockey player
Mathias From (born 1997) ice hockey player
Frederikshavn has established the following friendship towns (venskabsbyer): Borlänge, Sweden
North Tyneside, United Kingdom