People of the same age who share similar interests are ____.

The term that best fits the description of individuals of the same age who share similar interests is "peers." Peers are typically defined as people who are in a similar social or age group and often engage in similar activities or share common experiences. This connection allows them to relate to one another and foster social relationships based on shared interests.

In contrast, while friends are certainly individuals who share interests, not all friends must necessarily be the same age or in the same specific social group. "Group" is a broader term that can refer to any collection of individuals and does not specifically imply shared age or interests. "Classmates" specifically refers to individuals who attend the same class or school but does not inherently indicate that they share similar interests outside of that educational setting. Therefore, "peers" is the most accurate term to describe people of the same age with shared interests, highlighting both age similarity and social connection.