| Round | Date | League | Home Club Name | Away Club Name | Ground | ||
| THURSDAY 27 May | |||||||
| 6 | 27/5/21 | PLR | Pittwater RSL FC | 1 | 0 | Harbord FC | Jackson Rd 1 |
| FRIDAY 28 May | |||||||
| 8 | 2021-05-28 | Under 21/1 | Harbord FC A | 5 | 0 | Manly Vale FC | Millers 1 |
| 8 | 2021-05-28 | Under 21/1 | Harbord FC B | 1 | 3 | Wakehurst FC A | Ararat 1 |
| 8 | 2021-05-28 | O35/2 | Harbord FC | 4 | 5 | Seaforth FC | Harbord Park 1 |
| 8 | 2021-05-28 | O35/3 | Harbord FC | 2 | 0 | Curl Curl FC B | Millers 2 |
| SATURDAY 29 May | |||||||
| 1 | 2021-05-29 | Under 8 | Harbord FC Comets | 1 | 1 | Manly Allambie FC Dragons | Nolans J8/9A |
| 1 | 2021-05-29 | Under 8 | Pittwater RSL FC Jets | 4 | 4 | Harbord FC Rockets | Kitchener Park J8/9A |
| 1 | 2021-05-29 | Under 8 | Harbord FC Dynamites | 1 | 3 | Narrabeen FC Bandicoots | Nolans J8/9A |
| 1 | 2021-05-29 | Under 8 | Harbord FC Jets | 3 | 5 | Manly Vale FC Rhinos | Nolans J8/9B |
| 1 | 2021-05-29 | Under 9 | BTH Raiders SC Blizzards | 2 | 1 | Harbord FC Pumas | Bambara Oval J8/9 |
| 1 | 2021-05-29 | Under 9 | Harbord FC Leopards | 2 | 4 | CC Strikers FC Hawks | Nolans J8/9B |
| 1 | 2021-05-29 | Under 9 | Harbord FC Foxes | 2 | 4 | Pittwater RSL FC Pirates | Nolans J8/9A |
| 1 | 2021-05-29 | Under 9 | Seaforth FC Titans | 9 | 0 | Harbord FC Sharks | Tania Park J8/9 |
| 1 | 2021-05-29 | Under 9 | Harbord FC Tigers | 1 | 5 | Manly Vale FC Ravens | Nolans J8/9A |
| 1 | 2021-05-29 | Under 10 | Harbord FC Geckos | 6 | 3 | Manly Allambie FC Tigers | Nolans J!0 |
| 1 | 2021-05-29 | Under 10 | Harbord FC Redbacks | 1 | 4 | Avalon SC Pumas | Nolans J10 |
| 1 | 2021-05-29 | Under 10 | Harbord FC Giants | 1 | 1 | Forest Killarney FC Lightning | Nolans J10 |
| 1 | 2021-05-29 | Under 11 | Harbord FC Dragons | 5 | 5 | Saint Augustine’s FC Bombers | Nolans J10 |
| 1 | 2021-05-29 | Under 11 | Harbord FC Demons | 3 | 1 | Narrabeen FC Jaguars | David Thomas J10B |
| 1 | 2021-05-29 | Under 11 | Narrabeen FC Piranahs | 2 | 3 | Harbord FC Eagles | Boondah5 J10 |
| 7 | 2021-05-29 | Under 12/1 | Mosman FC | 4 | 2 | Harbord FC | Allan Border Oval 1 |
| 7 | 2021-05-29 | Under 12/3 | Harbord FC | 2 | 1 | Mosman FC B | Nolans 4 |
| 7 | 2021-05-29 | Under 12/4 | Harbord FC | 0 | 1 | BTH Raiders SC | Nolans 4 |
| 7 | 2021-05-29 | Under 13/4 | Manly Vale FC | 0 | 2 | Harbord FC | David Thomas 1 |
| 7 | 2021-05-29 | Under 14/4 | Curl Curl FC | 2 | 2 | Harbord FC | Abbott Road 4 |
| 7 | 2021-05-29 | Under 16/3 | Harbord FC | 2 | 4 | Mosman FC | Nolans 4 |
| 11 | 2021-05-29 | PL R | Saint Augustine’s FC R | 1 | 0 | Harbord FC R | Grahams 1 |
| 11 | 2021-05-29 | PL1 | Saint Augustine’s FC | 4 | 0 | Harbord FC | Grahams 1 |
| 8 | 2021-05-29 | AL R | Dee Why FC Rockets | 0 | 3 | Harbord FC R | Dee Why Oval 1 |
| 8 | 2021-05-29 | AL1 | Dee Why FC | 1 | 2 | Harbord FC | Dee Why Oval 1 |
| 8 | 2021-05-29 | AL4 | Harbord FC | 2 | 5 | Wakehurst FC | Nolans 4 |
| 8 | 2021-05-29 | AL5 | Harbord FC A | 1 | 1 | Harbord FC B | Nolans 4 |
| 8 | 2021-05-29 | AL6 | Harbord FC | 3 | 2 | Mosman FC | Harbord Park 1 |
| 8 | 2021-05-29 | AL8 | Harbord FC | 4 | 0 | Curl Curl FC A | Harbord Park 1 |
| 8 | 2021-05-29 | O35/4 | Harbord FC | 5 | 0 | CC Strikers FC | Nolans 5 |
| 8 | 2021-05-29 | O35/5 | Seaforth FC B | 1 | 4 | Harbord FC | Seaforth Oval 1 |
| SUNDAY 30 May | |||||||
| 6 | 2021-05-30 | W-Under 8 | Harbord FC Starfish | 1 | 6 | Manly Allambie FC Angels | Nolans J8/9A |
| 6 | 2021-05-30 | W-Under 9 | Avalon SC Daisies | 0 | 1 | Harbord FC Brumbies | Careel Bay J8/9A |
| 6 | 2021-05-30 | W-Under 9 | Manly Allambie FC Dolphins | 2 | 0 | Harbord FC Wolves | Grahams J8/9 |
| 6 | 2021-05-30 | W-Under 10 | Wakehurst FC Ladybirds | 0 | 6 | Harbord FC Opals | Nolans J10 |
| 6 | 2021-05-30 | W-Under 10 | Harbord FC Crystals | 0 | 4 | CC Strikers FC Foxes | Nolans J10 |
| 6 | 2021-05-30 | W-Under 11/2 | Pittwater RSL FC Pandas | 0 | 6 | Harbord FC Emeralds | Jackson Road J10 |
| 6 | 2021-05-30 | W-Under 12/2 | Harbord FC | 1 | 1 | Seaforth FC | Nolans 4 |
| 6 | 2021-05-30 | W-Under 12/3 | Mosman FC C | 0 | 2 | Harbord FC | Nolans 5 |
| 7 | 2021-05-30 | W-Under 13/2 | Harbord FC | 1 | 1 | Pittwater RSL FC | Nolans 4 |
| 6 | 2021-05-30 | W-Under 14/2 | Harbord FC | 13 | 0 | Seaforth FC | Nolans 3 |
| 7 | 2021-05-30 | W-AL1 | Curl Curl FC | 1 | 0 | Harbord FC | Abbott Road 5 |
| 7 | 2021-05-30 | W-AL4 | CC Strikers FC | 2 | 2 | Harbord FC | St Matthews Farm 4 |
| 7 | 2021-05-30 | W-040/1 | Harbord FC | 4 | 2 | Curl Curl FC A | Nolans 4 |
