Objectives To assess and compare rates of severe on‐farm injury for older (> 50 years) and younger (15‐49 years) cohorts, on NSW farms. Design Descriptive retrospective epidemiological study of the New South Wales Trauma Registry (Institute of Trauma and Injury Management ‐ ITIM) for persons injured on a farm. Setting New South Wales, Australia. Participants Cases involving persons (≥15 years), with data on the NSW Trauma Registry (2012‐16). Main outcome measures Comparison of injury rates and severity between younger (15‐49 years) and older (50+ years) cohorts over the 2012‐16 period based on Injury Severity Scores (ISS). Results Older males are injured at a rate that is roughly 18% higher than younger males and 13% higher than the overall injury rate. Older individuals also have significantly longer hospital stays post‐injury (P = 0.01), with this being most pronounced for older men (P < 0.01). There was no statistically significant difference in ISS demonstrated between the age cohorts (P = 0.64), except for younger women having higher median ISS than their older female counterparts (P = 0.02). Conclusion Overall, the general trends displayed support the contention that older males are more likely to incur a severe on‐farm injury than their younger counterparts. This provides support for a preventative focus targeting older farmers in NSW.