Caledonian Road passes for about a mile and a half north–south through the London Borough of Islington. It connects North London, from Camden Road near its junction with Holloway Road, and central London's Pentonville Road in the south. It is known colloquially as the "Cally" and forms the entirety of the A5203.

Caledonian Road is a station on the Piccadilly line of the London Underground, between King's Cross St. Pancras and Holloway Road, and in Travelcard Zone 2. It was opened on 15 December 1906 by the Great Northern, Piccadilly and Brompton Railway. The building was designed by Leslie Green.