One out of 10 women who delivered their baby via a caesarean section, suffer an infection, according to analysis of data.
The study also revealed that such infections were more common among overweight and obese women.
Dr Elizabeth Sheridan, head of healthcare associated infections at the HPA, said: "Reducing rates of surgical site infections following a caesarean should be made a priority. Given that one in four women deliver their baby by caesarean section, these infections represent a substantial burden.
"They will impact not only directly on the mother and her family but also are a significant cost in terms of antibiotic use, GP time and midwife care, and every effort should be made to avoid them. Women choosing to have caesarean section for non-medical reasons should be aware of the risk of infection, particularly if they are overweight."