| Maraimalai Nagar - Kamarajar | |
| Type: | Indian Railways and Chennai Suburban Railway station |
| Style: | Indian Railways |
| Address: | National Highway 32, Maraimalai Nagar, Chengalpattu taluk, Chengalpattu district, Tamil Nadu |
| Country: | India |
| Coordinates: | 12.7969°N 80.02°W |
| Mapframe-Marker: | rail |
| Mapframe-Marker-Color: |
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| Mapframe-Zoom: | 14 |
| Map State: | collapsed |
| Line: | South and South West lines of Chennai Suburban Railway |
| Structure: | Standard on-ground station |
| Platform: | 3 |
| Tracks: | 3 |
| Parking: | Available |
| Electrified: | 9 January 1965 |
| Code: | MMNK |
| Owned: | Ministry of Railways, Indian Railways |
| Zone: | Southern Railways |
| Former: | South Indian Railway |
| Mapframe: | yes |
Maraimalai Nagar - Kamarajar railway station is one of the railway stations of the – section of the Chennai Suburban Railway. It serves the town of Maraimalai Nagar, a suburb of the Chennai Metropolitan Area located in Chengalpattu district. It is situated at a distance of 47 km from Chennai Beach junction and is located on NH 45 in Maraimalai Nagar, with an elevation of 55 m above sea level. Government of India renamed the station after the INC(O) founder and the former Chief Minister of Tamil Nadu K. Kamaraj.
The lines at the station were electrified on 9 January 1965, with the electrification of the –Chengalpattu section.[1]