Benyounés Lahlou (born 3 November 1964) is a Moroccan runner who specialized in the 400 and 800 metres.
Lahlou finished seventh in 4 x 400 metres relay at the 1991 World Championships, together with teammates Abdelali Kasbane, Ali Dahane and Bouchaib Belkaid.
On the individual level, Lahlou won a silver medal at the 1991 Summer Universiade and a bronze medal at the 1993 Mediterranean Games, both times in the 400 m. Participating in the 1996 Summer Olympics, he finished eighth in the 800 m final.
- 1977: West Germany (Krieg, Hofmeister, Schmid, Herrmann)
- 1979: United States (Frazier, Green, Smith, Darden)
- 1981: United States (McCoy, Wiley, Smith, Darden)
- 1985: United States (McCoy, Phillips, Armstead, Franks)
- 1989: Americas (Martínez, Menezes, Burnett, Hernández)
- 1992: Africa (Lahlou, Matete, Kemboi, Bada)
- 1994: Great Britain (McKenzie, Ladejo, Baulch, Black)
- 1998: Great Britain (Hylton, Baulch, Baldock, Thomas)
- 2002: Americas (Sánchez, Francique, McDonald, Blackwood)
- 2006: United States (Ashley, Brew, Merritt, Williamson)
- 2010: Americas (Brenes, Jackson, Nixon, Chambers)
- 2014: Africa (Mucheru, Makwala, Kombe, Van Niekerk)