Scientists analysed the diets of more than 65,000 women from 1991 to 2009 before reaching their startling conclusion.
"Consumption of any type of fish tended to be associated with lower risk," said lead author Dr Sharon G. Curhan, of the Brigham and Women's Hospital at Harvard Medical School.
"These findings suggest that diet may be important in the prevention of acquired hearing loss."
Study participants self-reported 11,606 cases of hearing loss, with data revealing those who ate fish at least twice a week had a 20% less chance of hearing loss than those who did not.
Dr Curhan said the research, published in the American Journal of Clinical Nutrition, showed that higher fish consumption and intake of long-chain omega-3 polyunsaturated fatty acids helped improve cochlear blood flow.
"Blood flow to the inner ear needs to be very well regulated to meet its high energy demands," she added.
"Acquired hearing loss is a highly prevalent and often disabling chronic health condition.
"Although a decline in hearing is often considered an inevitable aspect of ageing, the identification of several potentially modifiable risk factors has provided new insight into possibilities for prevention or delay of acquired hearing loss."
The study team do not yet know whether eating fish has the same benefits for men.