Today, it is estimated that the municipality of Cazin has 72,000 residents with a clear Bosniak majority.

According to the 1991. census the municipality of Cazin had 63,409 residents, including:

• 61,693 - 97.29% Muslims by nationality
• 778 - 1.22% Serbs
• 139 - 0.21% Croats
• 430 - 0.67% Yugoslavs
• 369 - 0.58% others

According to the 1981. census the municipality had 57,110 residents, including:

• 55,401 - 97.00% Muslims by nationality
• 826 - 1.44% Serbs
• 122 - 0.21% Croats
• 529 - 0.92% Yugoslavs
• 232 - 0.40% others

According to the 1971. census the municipality had 45,468 residents, including:

• 43,880 - 96.50% Muslims by nationality
• 1,196 - 2.63% Serbs
• 175 - 0.38% Croats
• 51 - 0.11% Yugoslavs
• 166 - 0.36% others