Ribnik is a village and a municipality in Karlovac County, Croatia.

In the 2011 census, there were a total of 475 inhabitants in the municipality, 98.74% of whom are Croats, in the following settlements:

• Donja Stranica, population 2
• Drenovica Lipnička, population 7
• Gorica Lipnička, population 13
• Gornja Stranica, population 1
• Gornji Goli Vrh Lipnički, population 2
• Griče, population 63
• Jarnevići, population 33
• Jasenovica, population 25
• Lipnik, population 65
• Martinski Vrh, population 21
• Novaki Lipnički, population 16
• Obrh, population 7
• Ravnica, population 15
• Ribnik, population 113
• Skradsko Selo, population 25
• Sopčić Vrh, population 18
• Veselići, population 49