This article emerges from a scoping review of over two decades of relevant literature on immigrants' access to mental health services in Canada. Key online databases were searched to explore the gaps and opportunities for improving access to mental health services using a review framework provided by Arksey and O'Malley (Int J Soc Res Methodol 8:19-32, 2005). Immigrants and refugees came from diverse religious and cultural backgrounds and had complex mental health-related concerns that were not currently being adequately addressed by existing services. The major barriers to the utilization of mental health services included: those related to the uptake of existing health information and services; those that were related to the process of immigrant settlement; and barriers related to availability of appropriate services. A thematic analysis of the range of recommendations that emerge from these studies for improvement of research, practice and policy is provided.

Although participant women discussed a number of ways to deal with post-immigration stressors, the women's perceived compromised mental health reflects the inadequacy of their coping strategies and the available resources. Despite access to healthcare providers, women failed to identify healthcare encounters as opportunities to seek help and discuss their mental health concerns. Health and social care programs need to actively address the compromised mental health perceived by the studied group.

Existing health communication and health promotion models need to be re-orientated from a one-way information flow to a two-way dialogue model to bridge the gap between program efficacy and effectiveness to reach underserved immigrant women. An "outside the box" approach of non-institutional informal health promotion strategies needs to be tested for the studied groups.

The Mental Health Commission of Canada’s (MHCC) strategy calls for promoting the health and wellbeing of all Canadians and to improve mental health outcomes. Each year, one in every five Canadians experiences one or more mental health problems, creating a significant cost to the health system. Mental health is pivotal to holistic health and wellbeing. This paper presents the key findings of a comprehensive literature review of Canadian research on the relationship between settlement experiences and the mental health and well-being of immigrants and refugees. A scoping review was conducted following a framework provided by Arskey and O’Malley (Int J Soc Res Methodol 8:19–32, 2005). Over two decades of relevant literature on immigrants’ health in Canada was searched. These included English language peer-reviewed publications from relevant online databases Medline, Embase, PsycInfo, Healthstar, ERIC and CINAHL between 1990 and 2015. The findings revealed three important ways in which settlement affects the mental health of immigrants and refugees: through acculturation related stressors, economic uncertainty and ethnic discrimination. The recommendations for public health practice and policy are discussed.