Yamskaya Tower, Fortified tower in Kolomna, Russia.

Yamskaya Tower is one of the seven surviving towers of the Kolomna Kremlin, built between 1525 and 1531 on the eastern side between the lost Ivanovskiye Gates and the Voznesenskaya Tower. It has five storeys, the lowest being a podoshevenny tier with firing windows aimed at the moat. The tower was crowned by a sixth tier, a gallery whose merlons, like those of the walls, resembled a swallowtail, 2.5 m high, 1.44 m wide and 1 m deep.

The tower was built between 1525 and 1531 as part of the Kolomna Kremlin's eastern defences, between the now-vanished Ivanovski Gates and the Voznesenskaya Tower. A section of wall leading from it was rebuilt in 1977 for the city's 800th anniversary.

The name comes from the Yamskaya sloboda that stretched from the tower, where coachmen's, hunting and posting yards stood. The tower is also called Trinity Tower after the Trinity Church of that sloboda. Nearby today is the bus stop "Staraya Kolomna".

The tower is located within the Kremlin complex and is best visited on foot as part of a walk through the old city. Comfortable shoes are recommended since you may encounter uneven ground and stairs when exploring the structure and its surroundings.

The tower's upper tier was a gallery crowned with swallow-tail merlons, each 2.5 m high, 1.44 m wide and 1 m deep, matching the walls. The stretch of wall running from the tower was rebuilt for Kolomna's 800th anniversary in 1977.