The union movement in Atlantic Canada is growing in terms of membership but is slowly losing its influence in terms of employee coverage. Most of the recent gains in union membership have been in the public sector where almost 73% of employees in Atlantic Canada are now unionized. However, the changing industrial structure of the region’s economy is having a significant impact on unionization in the private sector. The Atlantic provinces , with the exception of Newfoundland and Labrador , already have some of the lowest unionization rates among private sector employees. This report explores the recent trends in union coverage in Atlantic Canada, focusing on trends in the private sector, and highlighting the potential implications for the region.