Kardijan (Persian: كرديجان) is a village in Mazraeh Now Rural District of the Central District of Ashtian County, Markazi province, Iran.

At the 2006 National Census, its population was 1,667 in 409 households. The following census in 2011 counted 1,646 people in 463 households. The latest census in 2016 showed a population of 1,635 people in 509 households. It was the most populous village in its rural district.