[2] Sedlejov is located about 20 kilometres (12 mi) south of Jihlava.
The highest point is a nameless hill at 651 m (2,136 ft) above sea level.
The Moravian Thaya River flows along the eastern municipal border.
For its entire feudal history, it belonged to the Telč estate.
[2] Sedlejov is located on the railway line Havlíčkův Brod–Slavonice.