Background: Speech and language therapists (SLTs) play an important role in assessing and rehabilitating communication disorders in people with dementia, but there is evidence to suggest that they do not receive appropriate training to provide management and support during their training. Aim: To investigate the level of awareness and knowledge that practising SLTs from Brazil have about dementia and their role in the care of dementia through an online survey. Methods & Procedures: An online survey tool was developed to collect information from practising Brazilian SLTs regarding their knowledge about dementia, awareness about their role in the care of people with dementia, and opinions on how SLTs may be better prepared to work in the dementia field. The survey was disseminated via social media, websites, and e-mail lists of researchers and stakeholders. Outcomes & Results: A total of 227 SLTs completed the survey. Participants showed good knowledge of dementia in general, while their answers were less accurate on primary progressive aphasia. Regarding the awareness by SLTs of their role in the care of people with dementia, most agreed or strongly agreed that SLTs could help people in the diagnosis, treatment and prevention of dementia (> 80%). However, fewer participants agreed or strongly agreed that they felt confident in contributing to the treatment and diagnosis process of dementia (about 50%). To improve the training of SLTs in Brazil, most participants believed that it would be necessary to improve the teaching of dementia at the undergraduate speech and language therapy curriculum level and to develop recommendations or guidelines about speech and language therapy practice in dementia. Conclusions & Implications: The results of this survey point to a need for improvement in the knowledge and confidence of Brazilian SLTs about dementia. To reach this goal, targeted training courses and applied practice opportunities should be embedded within university curricula and training programmes.