Khosbijan Rural District () is in Mahajeran District of Shazand County, Markazi province, Iran. Its capital is the village of Khosbijan, whose population at the time of the 2016 National Census was 475 people in 164 households.
In 2024, the city of Mahajeran and 17 villages were separated from Zalian District in the formation of Mahajeran District, and Khosbijan Rural District was created in the new district.