Diana Lobacevske (born Diana Maciusonyte on 7 August 1980 in Vilnius) is a Lithuanian long-distance runner who specialises in marathon and half marathon races.
Her marathon personal record is 2:28:03.
She represented her country in the marathon at the 2012 Summer Olympics and the 2011, 2013 World Championships in Athletics and 2016 Summer Olympics.
She won the Hamburg Marathon in 2013 and the Mexico City Marathon in 2016.