Do people know if you looked them up on Instagram?

No, people do not receive notifications if you look them up on Instagram. When you search for someone on Instagram, they will not be informed that you have searched for them. However, if you interact with their content by liking, commenting, saving, or sharing their posts, they will receive notifications about those interactions24. Additionally, if you view someone's Instagram Story, they will see your name in their Story's audience list, which can indirectly indicate that you have looked at their content4.