Mananchaya Sawangkaew (Thai: มนัญชญา สว่างแก้ว; born 10 July 2002) is a tennis player from Thailand.She has a career-high WTA singles ranking of world No. 192, achieved on 20 May 2024 and a doubles ranking of No. 546, achieved on 31 July 2023.
She has a career-high singles ranking of 247 by the Women's Tennis Association (WTA), achieved on 4 December 2023. Sawangkaew has won two singles titles and one doubles title on the ITF Women's Circuit.