| Round | Date | League | Home Club Name | Away Club Name | Ground | ||
| FRIDAY 11 JUNE | |||||||
| 10 | 2021-06-11 | Under 21/1 | Harbord FC B | 2 | 2 | Curl Curl FC | Millers Res 1 |
| 10 | 2021-06-11 | Under 21/1 | Narrabeen FC | 1 | 2 | Harbord FC A | Narrabeen High 1 |
| SATURDAY 12 JUNE | |||||||
| 3 | 2021-06-12 | Under 8 | Harbord FC Comets | 1 | 4 | Dee Why FC Roar | Nolans J8/9A |
| 3 | 2021-06-12 | Under 8 | Dee Why FC Cygnets | 0 | 1 | Harbord FC Rockets | Dee Why Oval J8/9 |
| 3 | 2021-06-12 | Under 8 | Avalon SC Red Bellies | 2 | 0 | Harbord FC Dynamites | Careel Bay |
| 3 | 2021-06-12 | Under 8 | Harbord FC Jets | 2 | 1 | Narrabeen FC Bandicoots | Nolans J8/9A |
| 3 | 2021-06-12 | Under 9 | Forest Killarney FC Rebels | 0 | 2 | Harbord FC Pumas | Killarney Heights J8/9A |
| 3 | 2021-06-12 | Under 9 | Harbord FC Leopards | 2 | 2 | Dee Why FC Wolves | Nolans J8/9B |
| 3 | 2021-06-12 | Under 9 | Seaforth FC Giants | 2 | 3 | Harbord FC Sharks | Seaforth Oval J8/9A |
| 3 | 2021-06-12 | Under 9 | Harbord FC Foxes | 1 | 5 | Brookvale FC Cyclones | Nolans J8/9A |
| 3 | 2021-06-12 | Under 9 | Harbord FC Tigers | 4 | 1 | BTH Raiders SC Bandits | Nolans J8/9A |
| 3 | 2021-06-12 | Under 10 | Harbord FC Geckos | 0 | 1 | Forest Killarney FC Cyclones | Nolans J10 |
| 3 | 2021-06-12 | Under 10 | Harbord FC Redbacks Forfeit | 0 | 5 | Seaforth FC Thunder | Nolans J10 |
| 3 | 2021-06-12 | Under 10 | Harbord FC Giants | 6 | 1 | Avalon SC Panthers | Nolans J10 |
| 3 | 2021-06-12 | Under 11 | Harbord FC Dragons | 3 | 1 | Dee Why FC Rovers | Nolans J10 |
| 3 | 2021-06-12 | Under 11 | Harbord FC Demons | 0 | 1 | Seaforth FC Vipers | Abbott Road 4J11 |
| 3 | 2021-06-12 | Under 11 | Harbord FC Eagles | 2 | 2 | CC Strikers FC Bulldogs | Abbott Road J10 |
| 9 | 2021-06-12 | Under 12/1 | Saint Augustine’s FC | 4 | 0 | Harbord FC | Passmore Res 2 |
| 9 | 2021-06-12 | Under 12/3 | Harbord FC | 4 | 4 | Wakehurst FC | Nolans 4 |
| 9 | 2021-06-12 | Under 12/4 | Harbord FC | 4 | 3 | Brookvale FC | Nolans 4 |
| 9 | 2021-06-12 | Under 13/4 | Dee Why FC A | 5 | 1 | Harbord FC | Nolans 3 |
| 10 | 2021-06-12 | Under 14/4 | Saint Augustine’s FC A | 4 | 1 | Harbord FC | Nolans 3 |
| 9 | 2021-06-12 | Under 16/3 | Harbord FC | 1 | 0 | Forest Killarney FC | Harbord Park 1 |
| 13 | 2021-06-12 | PL1R | Harbord FC R | 1 | 1 | Manly Vale FC R | Harbord Park 1 |
| 13 | 2021-06-12 | PL1 | Harbord FC | 1 | 1 | Manly Vale FC | Harbord Park 1 |
| 10 | 2021-06-12 | AL1R | Beacon Hill FC R | 0 | 0 | Harbord FC R | Beacon Hill Res 2 |
| 10 | 2021-06-12 | AL1 | Beacon Hill FC | 1 | 0 | Harbord FC | Beacon Hill Res 2 |
| 10 | 2021-06-12 | AL4 | Pittwater RSL FC B | 3 | 0 | Harbord FC | Kitchener Park 2 |
| 10 | 2021-06-12 | AL5 | Harbord FC B | 4 | 0 | Mosman FC C | Nolans 4 |
| 10 | 2021-06-12 | AL5 | Mosman FC B | 0 | 0 | Harbord FC A | Tristram Rd Res 1 |
| 10 | 2021-06-12 | AL6 | Beacon Hill FC | 3 | 6 | Harbord FC | Beacon Hill Res 1 |
| 10 | 2021-06-12 | AL8 | Dee Why FC | 0 | 6 | Harbord FC | Dee Why Oval 1 |
| 10 | 2021-06-12 | O35/2 | Wakehurst FC A | 1 | 4 | Harbord FC | Lionel Watts Oval 2 |
| 10 | 2021-06-12 | O35/3 | Manly Allambie FC | 1 | 4 | Harbord FC | Millers Res 3 |
| 10 | 2021-06-12 | O35/4 | Harbord FC | 7 | 2 | Mosman FC A | Nolans 4 |
| 10 | 2021-06-12 | O35/5 | Mosman FC | 5 | 1 | Harbord FC | Balmoral Oval 1 (East) |
| SUNDAY 13 June | |||||||
| 2 | 2021-06-13 | W-Under 8 | Wakehurst FC Pearls | 10 | 0 | Harbord FC Starfish | Hews Res J2 |
| 2 | 2021-06-13 | W-Under 9 | Harbord FC Brumbies | 1 | 0 | Harbord FC Wolves | Nolans J8/9A |
| 2 | 2021-06-13 | W-Under 10 | Brookvale FC Water Dragons | 5 | 0 | Harbord FC Crystals | Nolans J10 |
| 2 | 2021-06-13 | W-Under 10 | Seaforth FC Dolphins | 1 | 1 | Harbord FC Opals | Seaforth Oval J10 |
| 2 | 2021-06-13 | W-Under 11 | Harbord FC Emeralds | 7 | 1 | Beacon Hill FC Angels | Nolans J10 |
| 8 | 2021-06-13 | W-Under 12/2 | Harbord FC Dolphins | 2 | 0 | Forest Killarney FC | Nolans 4 |
| 8 | 2021-06-13 | W-Under 12/3 | Narrabeen FC | 1 | 1 | Harbord FC Sapphires | Boondah Res 2 |
| 10 | 2021-06-13 | W-Under 13/2 | Manly Vale FC | 0 | 2 | Harbord FC | David Thomas Res 2 |
| 8 | 2021-06-13 | W-Under 14/2 | Seaforth FC | 0 | 7 | Harbord FC | Seaforth Oval 1 |
| 9 | 2021-06-13 | W-AL1 | Harbord FC | 3 | 3 | Forest Killarney FC | Nolans 4 |
| 9 | 2021-06-13 | W-AL4 | Wakehurst FC A | 0 | 4 | Harbord FC | Lionel Watts 4 |
| 9 | 2021-06-13 | W-O40/1 | Harbord FC | 0 | 1 | Manly Vale FC | Nolans 4 |
| MONDAY 14 JUNE | |||||||
| 10 | 14/6/21 | Under 12/1 | Harbord FC | 0 | 1 | Forest Killarney FC | Nolans 4 |
| 11 | 14/6/21 | Under 14/4 | Harbord FC | 0 | 2 | Wakehurst FC | Nolans 4 |
| 11 | 14/6/21 | Under 21/1 | Harbord FC A | 5 | 0 | CC Strikers FC Forfeit | Millers Res 3 |
| 11 | 14/6/21 | AL1R | Harbord FC | 0 | 0 | Saint Augustine’s FC R | Nolans 4 |
| 11 | 14/6/21 | AL1 | Harbord FC | 1 | 3 | Saint Augustine’s FC | Nolans 4 |
| 11 | 14/6/21 | O35/4 | Dee Why FC | 1 | 2 | Harbord FC | Dee Why Oval 2 |
| 11 | 14/6/21 | O35/5 | Forest Killarney FC A | 1 | 0 | Harbord FC | Melwood Oval 2 |
