Recent advancements in genetic technologies have made genetic information increasingly sought out in a wide range of non-therapeutic contexts, which has increased the risk that such information be used to discriminate against individuals. Frequently, it is genetic counselors who have to respond to questions about genetic discrimination (GD) from worried patients. Here, we examine the general Canadian public's knowledge, attitudes, and concerns about GD through a comprehensive analysis and categorization of posts from selected Canadian online discussion forums. Overall, we collected 1,638 posts, from which we coded 694 posts originating from newspaper comment sections and Reddit posts that were categorized to yield 6 main themes that consistently concerned Canadian users on the topics of GD: (a) discussions centered around how insurance business practices can be affected by genetic information; (b) issues in employment; (c) ‘fear’ of genetic testing and eugenics; (d) preventive approaches such as law and human rights instruments; (e) the predictive value and privacy that should be conferred to genetic information; and (f) other ethical issues. Overall, discussions addressed risk stratification models applied to genetic information and personal insurance underwriting. We find that many forum users (aka forumites) fear GD in insurance and employment, consider genetic information private, and strongly support different legal approaches to prevent GD. However, we find dissension among forumites that may represent different advocacy groups such as insurers and employers. From these important concerns and social conceptions, we discuss issues that should be taken into consideration for the development of future policies and information campaigns addressing GD in Canada and other countries.