| Club: | Sydney FC (W-League) |
| Season: | 2020–21 |
| Manager: | Ante Juric |
| Stadium: | Cromer Park, Jubilee Stadium, Leichhardt Oval, ANZ Stadium |
| League: | W-League |
| League Result: | 1st |
| Cup1: | Finals Series |
| Cup1 Result: | Runners up |
| League Topscorer: | Remy Siemsen (7) |
| Season Topscorer: | Remy Siemsen (7) |
| Pattern La1: | _sydney1920h |
| Pattern B1: | _sydney1920h |
| Pattern Ra1: | _sydney1920h |
| Pattern Sh1: | _sydney1920h |
| Leftarm1: | 77BBFF |
| Body1: | 77BBFF |
| Rightarm1: | 77BBFF |
| Shorts1: | 002F5E |
| Socks1: | 77BBFF |
| Pattern La2: | _sydney1920a |
| Pattern B2: | _sydney1920a |
| Pattern Ra2: | _sydney1920a |
| Pattern Sh2: | _sydney1920a |
| Leftarm2: | FFFFFF |
| Body2: | 87CEEB |
| Rightarm2: | FFFFFF |
| Shorts2: | FFFFFF |
| Socks2: | FFFFFF |
| Pattern La3: | _sydney1920t |
| Pattern B3: | _sydney1920t |
| Pattern Ra3: | _sydney1920t |
| Pattern Sh3: | _sydney1920t |
| Leftarm3: | 334455 |
| Body3: | 334455 |
| Rightarm3: | 334455 |
| Shorts3: | 334455 |
| Socks3: | 334455 |
| Prevseason: | 2019–20 |
| Nextseason: | 2021–22 |
The 2020–21 Sydney FC W-League season was the club's thirteenth season in the W-League, the premier competition for women's football in Australia.
See main article: 2020–21 W-League.