Jessica Zelinka (born 3 September 1981 in London, Ontario) is a Canadian pentathlete, heptathlete, and 100 m hurdler.

[1] Her first international competition was the 2000 IAAF World Junior Championships in Athletics, where she was fifth in the heptathlon and also competed in the heats of the 100 meter hurdles.

[1] Zelinka's first major global outing came at the 2005 World Championships in Athletics and she finished in eleventh place.

Regional success came at the 2007 Pan American Games as she fended off Gretchen Quintana, among others, to top the podium and take the gold medal.

[4] After her Olympic appearance, she took the 2009 season off from competition and had a daughter with her partner Nathaniel Miller, a Canadian international in water polo.

Zelinka competed at the 2014 Commonwealth Games following a couple years away from the sport, there she won silver behind teammate Brianne Theisen-Eaton.