 Thornhill Square | |
  Shown within London Borough of Islington | |
| Postal code | N1 |
|---|---|
| Coordinates | 51°32′26″N 0°06′55″W / 51.540545°N 0.115195°W |
| Construction | |
| Construction start | 1847 |
| Completion | 1852 |
Thornhill Square together with the adjacent Thornhill Crescent form a garden square in the Barnsbury district of Islington, North London. It is bounded by Victorian terraced houses, all of which are listed buildings. The central public gardens contain flower beds, mature trees, and a children's play area, and the Crescent gardens surround the Victorian Church of St Andrew.