| ITF W35 - Osaka | 04/13 02:45 | 28 | [371] Sayaka Ishii v Mananchaya Sawangkaew [227] | 7-5,7-5 | |
| ITF W35 - Osaka | 04/12 01:00 | 27 | [291] Aoi Ito v Mananchaya Sawangkaew [227] | 3-6,4-6 | |
| ITF W35 - Osaka | 04/11 01:00 | 26 | [410] Miho Kuramochi v Mananchaya Sawangkaew [227] | 4-6,6-3,5-7 | |
| ITF W35 - Osaka | 04/10 05:05 | 25 | Hikaru Sato v Mananchaya Sawangkaew | 6-7,4-6 | |
| ITF W50 - Kashiwa | 04/02 05:05 | 25 | Mananchaya Sawangkaew v Chihiro Muramatsu | 6-3,5-7,4-6 | |
| ITF W50 - Kofu | 03/30 01:00 | 28 | [247] Mananchaya Sawangkaew v Ya-Hsuan Lee [413] | 4-6,4-6 | |
| ITF W50 - Kofu | 03/29 04:30 | 27 | Maegan Manasse v Mananchaya Sawangkaew | 6-3,4-6,4-6 | |
| ITF W50 - Kofu | 03/28 00:55 | 26 | [357] Naho Sato v Mananchaya Sawangkaew [247] | 7-6,4-6,3-6 | |
| ITF W50 - Kofu | 03/27 01:55 | 25 | [247] Mananchaya Sawangkaew v Sujeong Jang [215] | 7-5,6-4 | |
| ITF W35 - Indore | 03/16 04:30 | 28 | [239] Mananchaya Sawangkaew v Dalila Jakupovic [213] | 6-7,3-6 | |
| ITF W35 - Indore | 03/15 04:30 | 27 | [457] Jacqueline Cabaj Awad v Mananchaya Sawangkaew [239] | 2-6,1-6 | |
| ITF W35 - Indore | 03/14 04:00 | 26 | [326] Sahaja Yamalapalli v Mananchaya Sawangkaew [239] | 1-6,4-6 |
Mananchaya Sawangkaew (Thai: มนัญชญา สว่างแก้ว; born 10 July 2002) is a tennis player from Thailand.
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.
On the ITF Junior Circuit, she achieved a career-high combined ranking of 14, on 28 January 2019. She reached the quarterfinals of the girls' singles draw at the 2019 Australian Open.
Sawangkaew made her debut for Thailand Fed Cup team in 2019.