In conclusion, our study reveals that the CA9 SNP rs1048638 is the only significant polymorphism that increases the risk of cervical cancer among four CA9 gene polymorphisms, rs2071676 (+201, G/A), rs3829078 (+1081, A/G), rs1048638 (+1584), and an 18-base pair deletion/insertion, in Taiwanese women. Here, CA9 is linked to cervical cancer.