St Johns Beacon (also known as Radio City Tower) is a radio and observation tower in Liverpool, England. Designed by James A. Roberts Associates, it was built in 1969 and opened by Queen Elizabeth II.
The tower is 138 metres (453 ft) tall, and is the second-tallest free-standing structure in Liverpool. When considering the height of the tower, it has a 10 m (33 ft) long antenna on the roof, making it the tallest structure in Liverpool (including antennas).
As testament to the importance of its design, which was described by Historic England as "embodying the technological bravura and spirit of the space age", the building was listed at Grade II in November 2020.