EC1V: 9.1 m clear of the highest tide in the London Bridge ledgers

The lowest postcode in EC1V, EC1V 4AE, stands 9.1 m above the highest tide in the London Bridge ledgers (5.41 m, 1 February 1953). The highest, EC1V 4AB, stands 27 m above it.
- Ground at eight in ten of its postcodes: between 18 m and 24 m, measured from Ordnance Datum; the middle one stands at 20 m.
- None lies in the Environment Agency's Flood Zone 3 from the sea.
- Mostly in Islington; partly in Hackney.