In 2020, many places of worship closed due to COVID-19 restrictions, raising questions about rates of return to worship after COVID-19. This survey-based study of 806 Australian churchgoing Catholics explores relationships between a range of variables and the rate of return to Mass attendance after church closures. Pre-closure Mass attendance rate strongly and signifcantly predicted real-life worship during church closures and higher rates of return to Mass attendance after churches reopened. Real-life worship during COVID-19 also strongly predicted return to Mass attendance, and positively mediated the relationship between pre- and post-closure Mass attendance rates. Virtual worship engagement did not signifcantly predict return to Mass attendance, but positively mediated the relationship between pre- and post-closure Mass attendance rates, with a smaller effect size.