| Dates: | 8 October 1966– 10 October 1966 |
| Number Edition: | 33rd |
| Venue: | Singapore Badminton Hall |
| Location: | Geylang, Singapore |
| Ms: | Yew Cheng Hoe |
| Country Ms: | MAS |
| Ws: | Nurhaena |
| Country Ws: | INA |
| Md1: | Eddy Choong |
| Country Md1: | MAS |
| Md2: | Yew Cheng Hoe |
| Country Md2: | MAS |
| Wd1: | Nurhaena |
| Country Wd1: | INA |
| Wd2: | Tan Tjoen Ing |
| Country Wd2: | INA |
| Xd1: | Billy Ng |
| Country Xd1: | MAS |
| Xd2: | Sylvia Ng |
| Country Xd2: | MAS |
| Previous: | 1965 |
| Next: | 1967 |
The 1966 Singapore Open, also known as the 1966 Singapore Open Badminton Championships, took place from 8 to 10 October 1966 at the Singapore Badminton Hall in Singapore.[1] [2]
| Category | Winners | Runners-up | Score | |
|---|---|---|---|---|
| Men's singles | Yew Cheng Hoe | Tjia Kian Sien | 15–7, 15–1 | |
| Women's singles | Nurhaena | Tan Tjoen Ing | 12–11, 11–4 | |
| Men's doubles | Eddy Choong & Yew Cheng Hoe | Khor Cheng Chye & Tan Yee Khan | 15–13, 8–15, 15–2 | |
| Women's doubles | Nurhaena & Tan Tjoen Ing |  Aishah Attan & Lim Choo Eng | 15–6, 15–7 | |
| Mixed doubles | Billy Ng & Sylvia Ng | Eddy Choong & Lim Choo Eng | 17–15, retired |