The range of naturalistic observations of personality in online environments has been expanded with new communication technologies. That made it possible to capture a large volume of digital footprints (Big Data). This research aimed to carry out a systematic literature review of national and international scientific articles that used digital footprints to observe personality in the period from 2011 to 2020. The articles were accessed in the electronic databases PsycINFO, SciELO, Scopus (Elsevier), and PePSIC. In total, 25 articles were found, the most used social networks to obtain digital traces were Facebook and Twitter. It has also been found that personality assessment using digital footprints has been used for different purposes, such as developing product recommendation systems and automatic cyberbullying detection systems. The importance of Brazilian researchers to acquire the technical resources necessary to conduct empirical research on personality and big data is discussed, considering that only one of the articles found was published by Brazilian researchers.Keywords: Personality, digital footprints, social networks, observation methods, Big Data