Old Street is a 1-mile (1.6 km) street in inner north-east Central London, England that runs west to east from Goswell Road in Clerkenwell, in the London Borough of Islington, via St Luke's and Old Street Roundabout, to the crossroads where it meets Shoreditch High Street (south), Kingsland Road (north) and Hackney Road (east) in Shoreditch in the London Borough of Hackney.

Goswell Road, in Central London, is an end part of the A1. The southern part ends with one block, on the east side, in City of London; the rest is in the London Borough of Islington, the north end being Angel. It crosses Old Street/Clerkenwell Road. In the north it splits Clerkenwell from Finsbury; the south was sometimes used as a demarcator but all but the southern corporate/legal/financial end in the modern era forms the heart of the highly developed mixed-use district Barbican.