Tinea pedis is a condition that is common, often undiagnosed and frequently inadequately treated. It is reported as being rare in young children, but there are relatively few population-based reports of prevalence. A randomized sample of 2491 students from schools throughout the State of Victoria, Australia, were examined by dermatologists and dermatology registrars, who recorded clinical signs suggestive of tinea pedis, which were then confirmed by fungal culture. The age- and sex-adjusted prevalence of culture-proven tinea pedis was 5.2% [95% confidence interval (CI) 3.58-6.82] increasing with age from 2.1% (95% CI 0.95-3.28) in 4-6 year olds to 9.7% (95% CI 5.21-14.26) in 16-18 year olds. A higher proportion of males (6.0%) had tinea pedis than females (4.3%). Trichophyton mentagrophytes and T. rubrum were the most common dermatophytes isolated on culture. Less than 40% of those with a positive diagnosis had reported on the questionnaire that they had tinea. Of those who reported correctly that they had tinea, 75% had used one or more products to treat their condition, of which more than 40% were classified as unlikely to have any therapeutic effect on tinea pedis. These data confirm that tinea pedis, a potentially transmissible disease, is common in Australian schoolchildren, including those in primary school. There is a need for education programmes in schools on the nature of tinea pedis, the treatment available, and the public health approach to infection control within the school and home environment.