The meridian 155° west of Greenwich is a line of longitude that extends from the North Pole across the Arctic Ocean, North America, the Pacific Ocean, the Southern Ocean, and Antarctica to the South Pole.

The 155th meridian west forms a great circle with the 25th meridian east.
Starting at the North Pole and heading south to the South Pole, the 155th meridian west passes through:

ITV Meridian, previously Meridian Broadcasting from its inception in 1993 until 2002, is the holder of the ITV franchise for the South and South East of England. The station launched on 1 January 1993, replacing previous broadcaster Television South, and is presently owned and operated by ITV plc, under the licensee of ITV Broadcasting Limited.

The company broadcasts to the region from the Hannington, Midhurst, Rowridge, Whitehawk Hill, Hastings, Heathfield, Tunbridge Wells, Bluebell Hill and Dover transmitters. The company also broadcasts their news service to viewers served by the Oxford transmitting station despite this area being in the neighboring ITV Central region.

Meridian operates from Whiteley, Hampshire, producing regional news and current affairs programmes in addition to occasional networked productions for the ITV network.

ITV Meridian was formed as Meridian Broadcasting in 1991. The company consisted of a consortium between Mills & Allen International (MAI), Selectv (15%) and Central Independent Television (20%), the latter advised the consortium. Central along with Selectv were instrumental in winning the franchise as a low bidder. Meridian intended to operate as a publisher broadcaster, meaning that the majority of programmes would be commissioned from independent producers and not made by the company.

155th meridian may refer to: