Oldřiška Marešová (born 14 October 1986 in Litoměřice) is a Czech track and field athlete who specialises in the high jump. She has competed at the 2012 Summer Olympics. She was 3rd at the 2003 European Youth Olympic Festival. Her personal bests in the event are 1.92 metres outdoors (Olomouc 2012) and 1.92 metres indoors (Valašské Meziříčí 2015).