The North Harbour teenager, who celebrated her 15th birthday on day one of the tournament, fired a four under par 68 in the final round at the Tanah Merah Country Club Garden Course to help New Zealand win the close battle for second place.
South Korea, the defending champions, trumped the rest of the field again on the final day of the 34th Queen Sirikit Cup, clinching their sixth consecutive crown in the event.
Boosted by an overnight lead of 15 strokes over the Australian team of Whitney Hillier, Brenna Elliott and Oh Su-Hyun, the Koreans continued where they had left off.
A steady showing from World No. 17 Kim Hyo-Joo (70), coupled with firm displays from team-mates Park Chae-Yoon (68) and Baek Kyu-Jung (66) ensured that the Queen Sirikit trophy would be staying in Korea for another year.
They extend their lead as the most successful team in the Queen Sirikit Cup having won a total of 15 times over the Cup's 34-year history.
The Koreans finished with a three-day total of 413 strokes, 25 strokes ahead of runners up New Zealand (438) while Australia slipped from their overnight second position to finish two shots behind the New Zealanders in 3rd place.
New Zealand, who were fourth after the second day, moved up the standings on the strength of a stellar showing from young superstar Ko.
"I felt good playing the final round at that time of day, and just stumbled with a lone bogey," said Ko. As for Kim [the Korean winner], she really played well today, as she had the whole week. She's really in top shape, as is the whole Korean team."
But Korea was in a class of their own again all week in Singapore to continue a golden era for women's amateur golf for their country. Kim Hyo Joo claimed the individual honours with a two under par 70 in the final round for a three-day total of 204.
"It was my worst round," laughed Hyo Joo, who finished six shots clear of Ko.
"But it was a sweet win for me after losing narrowly (the individual title) last year. And for the team - it was a great achievement."
The premier women's amateur team tournament was held in Singapore for the first time since 1983, when the Singapore Island Country Club played host.
Next year's Queen Sirikit Cup will be held in Taiwan.
Queen Sirikit Cup Final Scores
413 Korea 142, 135, 136
438 New Zealand 146, 149,143
440 Australia 145, 147, 148
444 Philippines 147, 147, 150
445 Malaysia 147, 154, 144
446 Thailand 157, 146, 143, China 152, 149, 145
449 Indonesia 151, 150, 148
452 Japan152, 153, 147
457 India 152, 148, 157
458 Chinese Taipei 154, 153, 151
470 Hong Kong 152, 158, 160
476 Singapore 160, 157, 159