Iwona Marcinkiewicz (Polish pronunciation: [i'v?na mart??in'k?ev?it??]; born Iwona Dzieciol, 23 May 1975 in Warsaw) is an athlete from Poland.
She competes in archery.
Marcinkiewicz represented Poland at the 1996 Summer Olympics, 2004 Summer Olympics and 2008 Summer Olympics.
For her sport achievements, she received: Silver Cross of Merit in 1996.