Family name Niinikoski (Niinikoski 
) , all around the world, is a rare last name. The last name Niinikoski is characteristic of Northern Europe, particularly Finland, where it is quite a common surname, Estonia, where it is a rare surname, and Norway, where it is a very rare surname.
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| Niinikoski | Norway, Russia, Estonia, Finland, United States |
Нииникоски, and Нійнікоські
| jalmari niinikoski FI (b. 1900) |
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| olavi niinikoski FI (b. 1912) |
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| paavo niinikoski Finnish politician (1926-1993), FI (b. 1926) |
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| juha niinikoski Finnish professor, FI (b. 1942) |
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| juha niinikoski Finnish floorball player (1973-2011), FI (b. 1973) |
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| mikko niinikoski Finnish ice hockey player, FI (b. 1978) |
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| mikko niinikoski finnish pesäpallo player, FI (b. 1979) |
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| laura niinikoski researcher |
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| harri niinikoski researcher |
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| risto niinikoski |
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| leo niinikoski FI |
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| terhi niinikoski FI |
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| eija-riitta niinikoski FI |
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| sini niinikoski FI |
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Mr, Mikko, Miina, Sanna, Salla, Sampo, Seppo, Soile, Antti, Arttu, Kauko, Petri, Pekka, Roope, Risto, Laura, Leena, Janne, Jorma, Jouni, Jenni, Jussi, Milla, Matti, Marja, Marko, Ms, Mari, Sari, Sami, Satu, Pasi, Piia, Jane, Jani, Jari, Tapio, Joni, Juha, Jyri, Timo, Erik, Eero, Vili, Vesa, Olli, Outi, Maria, Joel, and Terhi