Sonderjyske

• Haderslev FK (14 July 1906 – 31 December 2000)
• HFK Sønderjylland ("Southern Jutland", 1 January 2001 – 31 December 2003)
• SønderjyskE Fodbold ("Southern Jutlandic Football", 1 January 2004 – 14 October 2022, under Sønderjysk Elitesport A/S)
• Sønderjyske Fodbold ("Southern Jutlandic Football", 15 October 2022 – Present)

Haderslev Fodboldklub (Haderslev FK / HFK) was founded on 14 July 1906. At the time, Haderslev was a part of the German Empire as a part of Schleswig-Holstein. The club had both Danish and German members, and in the initial years there were disagreement over if the club should be called Haderslev Fodboldklub (in Danish) or Haderslebener Fussball Club (in German). In the first many years the team had trouble assembling a proper match squad due to lack of members. In 1908 they became South Jutland champions for the first time beating Sønderborg 11–1 in the final.

For the first many years the club did not have their own field and instead played at barracks. Their first proper football ground was built in 1930.

In 1958 HFK were promoted to the 4th division (Jyllandsserien), and in 1965 they were promoted to the 3rd Division. In 1992 they were promoted to the Danish 2nd Division and in 1996 they were promoted to the second tier, Danish 1st Division, for the first time.

In 2000 the team, which was now called HFK Sønderjylland, were promoted to the Superligaen, the first team from Southern Jutland to ever do so. They were however relegated the following season. The team also moved into a new stadium, hosting 10,000 spectators.

After teams in both football, ice hockey and handball started to have success, the company Sønderjysk Elitesport A/S was founded on 1 January 2004 to promote professional sports in Southern Jutland. It was a union of the handball club TM Tønder (who later left the initiative), HFK, the Ice Hockey club Vojens Ishockeyklub, and the women's football team IK Sønderjylland.

SønderjyskE was promoted to the Superligaen again in 2005, but once again it would only be for a single season.

In 2008 they returned to the Superliga, and after finishing 10th they managed to survive for the first time ever. The following three seasons they improved on their best ever league finishes with a 9th, a 7th and a 6th-place finish.

In the 2012–13 season, SønderjyskE achieved the unfortunate European record of missing 7 penalty kicks in a row.

In 2016-17 the club played continental games for the first time ever, after finishing second in the 2015-16 Danish Superliga and their coach Jakob Michelsen was named Danish coach of the year. Here they beat Norwegian Strømgodset in the Europa League qualification 2–1. It was followed up by beating Polish Zagłębie Lubin. In the last qualification match against Sparta Prague they managed a 0–0 draw at home, and went up 2–0 in the return fixture, but Sparta Prague would go on to win 3–2.

In 2020 SønderjyskE won their first ever trophy, the DBU Pokalen, when they beat AaB in the final 2–0.

In September 2020 the club was bought by the American investor Robert Michael Platek for an unknown fee.

In 2021 they reached the cup final for the second time in a row, after beating FC Midtjylland in the semi-final. They would however lose to Randers FC in the final 4–0.

The season afterwards the team was relegated to the Danish 1st Division for the first time ince 2007–08, winning just 4 matches the entire season. The new ownership faced heavy criticism for their management of the club, and in August 2022 the team was sold back to local ownership. Following the sale the club was administratively separated from the other sports teams in SønderjyskE and changed their name from SønderjyskE to Sønderjyske. They did however share some administrative coordination regarding sponsors, logo and sales.

Two seasons later the team was promoted to the Superliga again by winning the Danish 1st Division.