Dea Herdželaš (Cyrillic: ??? ????????; born 7 November 1996) is a Bosnian tennis player.
Herdželaš has won five singles and six doubles titles on the ITF tour in her career.
On 23 November 2015, she reached her best singles ranking of world number 329.
On 23 April 2018, she peaked at world number 341 in the doubles rankings.
Herdželaš made her debut for the Bosnia and Herzegovina Fed Cup team in February 2013, losing to Anne Keothavong of Great Britain.