The hippocampus is typically larger in females than in males according to most reviews on gender-related brain differences.

Scientific studies have generally found that females tend to have a larger hippocampus relative to total brain size compared to males. However, these differences are complex and not purely indicative of distinct categorical differences between genders, as structural variations can vary among individuals. Some sources suggest that while these differences exist, they are not definitive or category-defining for gender differences in the brain.