The Post Road Branch is a railroad line owned and operated by Amtrak in the U.S. state of New York.

Freight service is provided by CSX Transportation, who calls it the Post Road Subdivision, via trackage rights.

With the opening of the Hudson River Connecting Railroad in 1924,[5] it became a minor branch, with through freight using the new Alfred H. Smith Memorial Bridge around Albany.

On April 30, 1972, Penn Central Transportation removed the track on the Post Road Branch, forcing passenger trains to make a reverse movement along the current Schodack Subdivision.

These rights were assigned to CSX Transportation in the 1999 breakup of Conrail.