Çayırhan is a neighborhood located within the district of Nallıhan in the Ankara Province of Turkey. It serves as a residential area with a recorded population of 8,156 as of 2022.
Historically, Çayırhan held the status of a town (belde) prior to a reorganization that took place in 2013. Following this administrative change, it was integrated into the municipality and district of Nallıhan.