|Full name||Association Sportive Olympique de Chlef|
|Founded||June 13, 1947|
as Association Sportive Orléansvilloise 
|Ground||Stade Mohamed Boumezrag|
|Head Coach||Samir Zaoui|
|League||Ligue Professionnelle 1|
|2018–19||Ligue Professionnelle 2, 3rd (promoted)|
Association Sportive Olympique de Chlef (Arabic: الجمعية الرياضية لأولمبي الشلف), known as ASO Chlef or simply ASO for short, is an Algerian football club based in Chlef, founded in 1947. The club colours are red and white. Their home stadium, Stade Mohamed Boumezrag, has a capacity of some 20,000 spectators. The club is currently playing in the Algerian Ligue Professionnelle 1.
ASO Chlef was founded on June 13, 1947, as Association Sportive d'Orléansville, Orléansville being the colonial name of Chlef at the time. The club was founded by the indigenous Algerian Muslim community of the city who wanted a club to rival the already existing European club in the city, Groupement Sportif Orléansville. In its first season of existence, the club finished second in the third division. In the following two seasons, it won promotion to the first division. After Algeria gained its independence in 1962, the name of the city was changed from Orléansville to El Asnam and the club changed its name to Asnam Sportive Olympique, keeping its original ASO initials.
On June 21, 2005, ASO Chlef won its first domestic title after beating USM Sétif 1–0 in the final of the 2005 Algerian Cup with a goal from Mohamed Messaoud in extra-time. By winning the Cup, they also qualified for continental competition for the first time, earning a spot in the 2006 CAF Confederation Cup. However, their run in African competition came to a quick end. After walking over ASC Entente of Mauritania in the preliminary round, they lost to AS Douanes of Senegal 1–0 on aggregate in the first round.
On May 12, 2012, ASO Chlef beat Sudanese club Al-Hilal 4–2 in a penalty shoot-out in the second round of the 2012 CAF Champions League after the two legs ended up tied 2–2 to qualify to the group stage for the first time in the club's history.
- Champion (1): 2010–11
- Runner-up (1): 2007–08
- Winner (1): 2004–05
- Runner-up (1): 1991–92
Performance in CAF competitions
- CAF Champions League: 2 appearances
- CAF Confederation Cup: 2 appearances
Below are the notable former players who have represented ASO Chlef in league and international competition since the club's foundation in 1947. To appear in the section below, a player must have played in at least 100 official matches for the club or represented the national team for which the player is eligible during his stint with ASO Chlef or following his departure.
For a complete list of ASO Chlef players, see Category:ASO Chlef players
- Sid-Ahmed Slimani
- Abdelkader Amrani (2003–09)
- Rachid Belhout (July 1, 2007 – June 30, 2008)
- Said Hadj Mansour (July 1, 2008 – June 30, 2009)
- Moussa Saïb (2009)
- Meziane Ighil (July 13, 2010 – Sept 5, 2011)
- Noureddine Saâdi (Sept 6, 2011 – June 30, 2012)
- Rachid Belhout (July 1, 2012 – Oct 25, 2012)
- Mohamed Benchouia (interim) (Oct 23, 2012 – Nov 15, 2012)
- Nour Benzekri (Nov 14, 2012 – Jan 24, 2013)
- Mohamed Benchouia (interim) (Jan 25, 2013 – June 30, 2013)
- Meziane Ighil (July 1, 2013–)
- "Archived copy". Archived from the original on 2011-11-20. Retrieved 2011-10-20.CS1 maint: archived copy as title (link)
- cheliff.org (May 12, 2008). "HISTOIRE DU CLUB" (in French). ASOChlef.info. Archived from the original on September 6, 2011. Retrieved April 25, 2012.
- "Fiche de Match". www.dzfoot.com. Retrieved 2017-09-13.
- Ligue 1 : L'ASO Chlef est champion 2010/2011 Archived June 23, 2011, at the Wayback Machine
- "L'ASO Chlef se qualifie en phase de poule" (in French). DZFoot. May 12, 2012. Archived from the original on May 14, 2012. Retrieved May 13, 2012.
- "FICHE DU CLUB: ASO CHLEF".