This chapter reviews selected research about leadership in early childhood education (ECE) in Finland, Germany, Japan, Singapore, South Africa, and USA. A short general introduction to ECE in each country is offered, followed by the summary of the research conducted in the country in question. In addition, a comparative synthesis of research is presented in which the methodological choices, broader societal and educational background and the research contributions to understanding leadership in ECE are discussed from international and transnational perspectives. This review concludes that ECE is of growing interest in the countries included in the study and its impact is widely recognised. Furthermore, the review indicates that in Finland and the USA, there has been extensive research on ECE leadership research, while in Germany, Singapore, South Africa and Japan research into ECE leadership has only recently emerged. Despite the differences in the traditions and roots of leadership research, good quality early childhood education is seen as the main objective of the leadership in every country.