Teachers' health literacy is an important part of school health promotion programmes. This study in 2013 assessed health literacy and related factors in schoolteachers in Çorum, Turkey. In a cross-sectional study, 500 primary and secondary teachers answered a questionnaire about self-reported health behaviours and completed the 6-item Newest Vital Sign tool. The mean score on the health literacy scale was 2.12 (SD 1.82). Overall, 44.0% of the teachers had very limited, 29.8% limited and 26.2% adequate health literacy. Adequate health literacy levels were significantly higher among those without chronic disease, non-smokers, non-alcohol users and those interested in healthy lifestyle topics in the media. In binary logistic regression analysis, the risk of limited health literacy was significantly greater in the older age groups, in men and in those whose partner was an educator or a housewife. In view of the low health literacy levels, we suggest that teacher candidates could benefit from health education programmes after graduation.