Abstract Background There is a strong culture of sports club membership amongst older people in Ireland. It has been suggested that this confers health benefits due to increased physical activity and social connection, but studies examining this are currently lacking. The aim of this study therefore was to assess the relationship of sports club membership with markers of health and well-being in a large population-representative cohort of older people. Methods Over 3,500 participants ≥65 years at Wave 5 (mean 74 years, 54% female) of the Irish Longitudinal Study on Ageing were included. Sports club membership (GAA, soccer, rugby, tennis, golf) was elicited by self-report. Depressive symptoms (Centre for Epidemiological Studies Depression Scale), loneliness (UCLA Scale), and quality of life (Control Autonomy Self-Realization Please Scale) were assessed with internationally validated scales. Physical Activity was by self-report and mobility impairment was defined as Timed-Up-and-Go≥14s. The associations between sports club membership and these outcomes were assessed with regression models adjusted for age, sex, education, polypharmacy, chronic disease burden and heart disease. Results One fifth (708/3,510) of participants were a member of a local sports club. Sports club membership was associated with lower rates of depressive symptoms (Odds ratio 0.51 (95% CI 0.34,0.75)), lower levels of loneliness (Beta = -0.28 (95% CI -0.46, -0.10)) and better quality of life (Beta= 0.93 (95% CI 0.49,1.38)) in fully-adjusted models. Sports club members spent more days doing moderate physical activity per week (2.0 (95% CI 1.85,2.21) vs 1.64 (95% CI 1.54,1.73); p<0.001) and had lower likelihood of mobility impairment (Adjusted Odds Ratio 0.49 (95% CI 0.36,0.68)). Conclusion Sports Club Membership is prevalent amongst community-dwelling older people in Ireland and is associated with lower rates of loneliness, depressive symptoms and mobility impairment, and better quality of life. Older sports club members should be encouraged to maintain this activity where feasible.