| Nationality: | Greek |
| Birth Date: | 13 October 1969 |
| Birth Place: | Piraeus, Greece |
| Position: | Center back |
| Years1: | –1986 |
| Clubs1: | Kichreas Salaminas |
| Years2: | 1986–1990 |
| Clubs2: | ESN Vrilissia |
| Years3: | 1990–1993 |
| Clubs3: | Ionikos Nea Filadelfeia |
| Years4: | 1993–1997 |
| Clubs4: | ESN Vrilissia |
| Years5: | 1997–1999 |
| Clubs5: | TSV Friedberg |
| Years6: | 1999–2000 |
| Clubs6: | HSG Düsseldorf |
| Years7: | 2000–2002 |
| Clubs7: | ASE Douka |
| Years8: | 2002–2003 |
| Clubs8: | Athens College |
| Years9: | 2003–2004 |
| Clubs9: | Panellinios |
| Years10: | 2004–2005 |
| Clubs10: | Pfadi Winterthur |
| Years11: | 2005–2006 |
| Clubs11: | Panellinios |
| Nationalyears1: | 1990–2006 |
| Nationalteam1: | Greece |
| Manageryears1: | 2005 |
| Managerclubs1: | Pfadi Winterthur |
| Manageryears2: | 2007–2010 |
| Managerclubs2: | Panellinios |
| Manageryears3: | 2007–2010 |
| Managerclubs3: | Greece (youth) |
| Manageryears4: | 2010–2011 |
| Managerclubs4: | ESN Vrilissia |
| Manageryears5: | 2013–2016 |
| Managerclubs5: | Poseidon Loutrakiou |
| Manageryears6: | 2016–2018 |
| Managerclubs6: | Greece |
| Manageryears7: | 2017–2019 |
| Managerclubs7: | AEK Athens |
| Manageryears8: | 2020–2022 |
| Managerclubs8: | Olympiacos (youth) |
| Manageryears9: | 2022–2024 |
| Managerclubs9: | Olympiacos |
Nikos Grammatikos (el|Νίκος Γραμματικός; born 13 October 1969) is a Greek former handball player and current coach. He competed at the 2004 Summer Olympics[1] and at the 2005 World Championship.