Essi Sievers, "née" Hallvar, (born 2 April 1983) is a Finnish retired ice hockey defenceman. She played in 91 international matches with the Finnish national team and won bronze with them at the 2011 IIHF Women's World Championship. Sievers competed at the elite club level for 15 seasons; she played 14 seasons in the Finnish Naisten SM-sarja and one season in the German Women's Bundesliga.