Whilst an international shortage of male teachers has received much research attention, to date, no study has tracked the trajectory of male teachers in any country. Drawing on annual workplace data, we calculated the proportion of male teachers in Australia from 1965 to 2016. We separate the data for Government and non-Government (Independent and Catholic) schools, and for primary and secondary schools. Findings indicate a strong decline in male representation in the Government sector. A similar rate of decline is observed in both primary and secondary schools. Of significance to educators, policy makers, and the public - no current Australian workforce diversity policies aim to redress this decline. This strong decline is not matched in the Catholic sector, however.