|25 Aug 19||RKC Waalwijk  ||-|| ADO Den|
|31 Aug 19||ADO Den  ||-|| VVV-Venlo|
|15 Sep 19||Feyenoord  ||-|| ADO Den|
|22 Sep 19||ADO Den  ||-|| AZ Alkmaar|
|27 Sep 19||FC Emmen  ||-|| ADO Den|
|17 Aug 19||ADO Den|| ||1 - 2|| ||Sparta|
|11 Aug 19||PSV Eindhoven|| ||3 - 1|| ||ADO Den|
|04 Aug 19||ADO Den|| ||2 - 4|| ||FC Utrecht|
|15 May 19||ADO Den|| ||6 - 2|| ||Willem II|
|12 May 19||Feyenoord|| ||0 - 2|| ||ADO Den|
Alles Door Oefening Den Haag (Dutch pronunciation: ), commonly known by the abbreviated name ADO Den Haag , is a Dutch football club from the city of The Hague. The club was for a time known as FC Den Haag , with ADO representing the amateur branch of the club. Despite being from one of the traditional three large Dutch cities, it has not been able to match AFC Ajax, Feyenoord or PSV in terms of success in the Eredivisie or in European competition. There is nonetheless a big rivalry with Ajax and Feyenoord. The words Alles Door Oefening translates into Everything Through Practice in Dutch.
On 1 February 1905, the club Alles Door Oefening (ADO) was founded in café 'Het Hof van Berlijn' (now: De Paap) in The Hague. In the first years of its existence, the club endured some difficult times as many members refused to pay their fees and the sport of cricket was more popular in the city. ADO started out in the local Haagsche Voetbal Bond, but promoted to the national Nederlandsche Voetbal Bond in 1912. That year they promoted to the 3rd level (3e klasse NVB) and two years later they even earned the championship on that level.
After moving to the Zuiderpark stadium in 1925, ADO continued to grow to a club of some significance. In 1926, the club earned promotion to the highest national level, the 'Eerste Klasse'. In the following years the red-green-white team struggled not to be relegated at first, but rose to the top of the league at the end of the 1930s. In 1939 the club just missed the class title after losing to DWS in Amsterdam. In 1940 the title seemed very close again, but another 2nd place finish was the highest achievable position after the club saw many players being drafted in the army with World War II closing in. This time another club from Amsterdam, Blauw-Wit, grabbed the title. In 1941, ADO finally won their class and moved on to the national champion's competition, losing that to Heracles.
In the 1941–42 season all the stars were aligned, and although the War made everday life harder and harder, the club seemed undefeatable. After winning their league, often by many goals difference, ADO moved on to the national champion's competition and fought for the title with Heerenveen, AGOVV, Eindhoven and Blauw-Wit. A 5–2 victory over AGOVV finally brought ADO their first national title. In 1943 ADO won another title, amongst others by beating legend Abe Lenstra's Heerenveen 8–2.
The Hague had to wait until the 1960s for more successes from their local club. After Ernst Happel joined ADO as a coach in 1962, the club worked their way to the top of the league again. They finished 3rd in the final ranking in 1965. In 1963, 1964 and 1966 ADO played in the national cupfinal, the KNVB Beker, but lost. In 1968 they again reached the final, and this time beat Ajax to win it. In the 1970–71 season, ADO started the league with 17 games undefeated and were at the top of the national league, but ended their season as No. 3.
In 1967, ADO played a summer in North America's United Soccer Association, under the name San Francisco Golden Gate Gales. The club finished tied for second in the Western Division.
After a long spell in the country's second tier of league football, ADO Den Haag played four seasons in the Eredivisie then were relegated again in the 2006–07 season. However, after finishing 6th in the 2007–08 season, they went on to win the play-offs, meaning promotion back to the Eredivisie for 2008–09. The club's new home is the 15,000 seater Kyocera Stadion; formerly known as the Den Haag Stadion. They used to play the home games at the Zuiderpark Stadion. Their home colors are yellow and green. They started the 2008–09 season with two wins, which put them on top of the Eredivisie for the first time in 32 years. In the season 2009–2010 the average attendance was 11,745 people.
The team had a great success in season 2010–2011. Beating rival AFC Ajax 2 times was one of the best results that year. ADO Den Haag ended 7th in the Eredivisie and won the play-offs (beating Roda JC and FC Groningen) which offered the last Dutch Europa League ticket. They won the first matches against FK Tauras (3–2, 2–0) but lost the first away leg for the third qualifying round against AC Omonia Nicosia, by 3–0, at Nicosia.
ADO supporters have strong links with Welsh club Swansea City. Flags of the respective clubs are often flown at the matches of the other club, and both clubs regularly hold pre-season friendly matches. Legia Warszawa (Poland), Club Brugge (Belgium), and Juventus (Italy) also share strong supporter links with ADO Den Haag.
Rivalry with fellow Dutch teams is, however, less friendly and ADO achieved notoriety following an incident after beating Ajax on 20 March 2011. Anti-semitic songs including "Hamas, Hamas, Jews to the Gas" were sung not only by ADO supporters but also by their midfielder Lex Immers who was subsequently suspended for 5 matches.
In 2004 a domestic match between ADO Den Haag and PSV Eindhoven was abandoned after 80 minutes due to racist chanting from the crowd.