Chelsea Jaensch (born 6 January 1985 in Adelaide) is an Australian athlete specialising in the long jump. She made her major competition debut at the age of thirty-one at the 2016 World Indoor Championships finishing eleventh. She returned to competition in 2012 after a seven-year break to focus on education and playing netball. She represented her country at the 2016 Summer Olympics in Rio de Janeiro finishing 17th and not qualifying for the final.