In an approach to establishing personal identity using user identity patterns, one or more processors receive a set of input images corresponding to a period of time, where each input image in the set of input images corresponds to a specific time within the period of time. One or more processors may also identify a first user in the set of input images and determining, a user identity pattern based on the set of input images, where the user identity pattern includes multiple instances of at least one physical characteristic of the first user over the period of time. One or more processors may further determine a user behavior based on the user identity pattern. One or more processors may additionally associate the set of input images and the user identity pattern with a first user profile for the first user.