A Speech-Language Pathologist (SLP) is a specialist in the assessment, treatment and prevention of communication disorders. In Canada and the United States, a university degree at the Master's level is the recognized standard of education. In Ontario, the Regulated Health Professions Act, 1991, created governing bodies to regulate the activities of professional service providers, including SLPs. The College of Audiologists and Speech-Language Pathologists of Ontario (CASLPO), is that governing body, and is made up of a council of professional members and members of the public. SLPs are accountable to CASLPO and are required by law to provide competent and ethical services. Only registered members of CASLPO are permitted to use the titles Speech-Language Pathologist, Speech Therapist, or Speech Clinician.

SLPs are employed in hospitals, schools, rehabilitation centres, government agencies, and private practice. Many SLPs are specialized and work with specific populations or disorders, such as child language, learning disabilities, developmental delays, autism, articulation/phonology, fluency, voice, swallowing, neurogenics, dementia, and acquired brain injury.

Listings of SLPs in private practice are available through local associations. In Ontario, contact  .