Nungnadda "Jib" Wannasuk (Thai: หนึ่งนัดดา วรรณสุข; born 11 November 1989) is a Thai former professional tennis player.

She earned her best result in the 2011 PTT Pattaya Open where she, as a qualifier, reached the second round.

She lost to top seed Vera Zvonareva, 1–6, 5–7.

Wannasuk won nine singles titles and 15 doubles titles on the ITF Women's Circuit.

Her highest WTA rankings are 342 in singles, achieved on 10 June 2013, and 317 in doubles, set on 17 August 2009.