|Country (sports)||Chinese Taipei|
|Born||1 July 1978|
|Height||1.73 m (5 ft 8 in)|
|Career titles||3 ITF|
|Highest ranking||No. 232 (21 October 1996)|
|Career titles||5 ITF|
|Highest ranking||No. 235 (13 November 1995)|
Weng Tzu-ting (born 1 July 1978) is a Taiwanese former professional tennis player. She is also known as Judy Weng.
Weng appeared in a total of 19 Fed Cup ties for Chinese Taipei and represented her country in several multi-sport competitions. She won a gold medal at the 1998 Asian Games in the team event. At the 2000 Summer Olympics, she and Janet Lee represented Chinese Taipei in the doubles, where they were beaten in the first round by Ukraine's pairing. They also partnered together at the 2001 Summer Universiade to win a bronze medal.
On the WTA Tour, Weng had a best singles ranking of 232 in the world.
She played her last Fed Cup tie in 2002, which was her final year on tour.
|Runner-up||1.||12 September 1993||ITF Taipei, Taiwan||Hard||Jeon Mi-ra||6-1, 3-6, 5-7|
|Winner||2.||17 March 1996||ITF Taipei, Taiwan||Hard||Choi Young-ja||6-1, 3-6, 6-4|
|Winner||3.||12 July 1998||ITF Easton, United States||Hard||Julie Thu||6-0, 4-6, 7-6|
|Winner||4.||8 July 2001||ITF Kaohsiung, Taiwan||Hard||Kaori Aoyama||6-4, 7-5|
|Winner||1.||16 August 1992||ITF Taipei, Taiwan||Hard||Lin Ya-hui|| Nao Akahori
|Winner||2.||21 November 1993||ITF Nonthaburi, Thailand||Hard||Miho Saeki|| Choi Ju-yeon
|3-6, 6-3, 6-3|
|Winner||3.||8 August 1994||ITF Jakarta, Indonesia||Hard||Tang Min|| Natalia Soetrisno
|Runner-up||4.||22 May 1995||ITF Beijing, China||Hard||Francesca La'o|| Kim Ih-sook
|Runner-up||5.||11 March 1996||ITF Taipei, Taiwan||Hard||Hsu Hsueh-li|| Kazue Takuma
|5-7, 7-6(5), 6-7(4)|
|Runner-up||6.||10 November 1997||ITF Manila, Philippines||Hard||Khoo Chin-bee|| Ding Ding
|Runner-up||7.||17 July 2000||ITF Baltimore, United States||Hard||Courtenay Chapman|| Tomoe Hotta
|Runner-up||8.||8 July 2001||ITF Kaohsiung, Taiwan||Hard||Khoo Chin-bee|| Maki Arai
|Winner||9.||28 October 2001||ITF Manila, Philippines||Hard||Chuang Chia-jung|| Chao Hsiao-han
|Winner||10.||11 November 2001||ITF Manila, Philippines||Hard||Chuang Chia-jung|| Ha Ji-sun
|Runner-up||11.||25 November 2001||ITF Kofu, Japan||Clay||Kim Jin-hee|| Etsuko Kitazaki
|6-4, 6-7(5-7), ret.|