UNLABELLED: COVID-19 is an infection, primarily respiratory, caused by the SARS-CoV-2, which can also affect the central nervous system, causing neuropsychological damage. There are studies describing post-COVID-19 cognitive deficits, but it is important to know this outcome in populations with different social, biological, and cultural characteristics. OBJECTIVE: The aim of this study was to assess the self-perception of cognitive sequelae in post-COVID-19 individuals and identify whether there is a possible relationship between the outcome of the participants' self-perception and sociodemographic and clinical data. METHODS: This is a cross-sectional study, carried out through an online questionnaire on the Google Forms platform, in which sociodemographic data, general health data, clinical manifestations of COVID-19, and post-COVID-19 self-perception of the cognitive domains of memory, attention, language, and executive functions were collected. RESULTS: The final sample consisted of 137 participants, and it was possible to identify that memory and attention were the domains with the highest impression of worsening post-COVID-19, followed by executive functions and language. In addition, it was identified that being female may be related to a worse self-perception of all cognitive functions and that having depression or other psychiatric diseases and obesity can significantly affect at least half of the cognitive domains evaluated. CONCLUSIONS: This study pointed to a post-COVID-19 cognitive worsening of the participants.