EC2A: 5.7 m clear of the highest tide in the London Bridge ledgers

The lowest postcode in EC2A, EC2A 1RS, stands 5.7 m above the highest tide in the London Bridge ledgers (5.41 m, 1 February 1953). The highest, EC2A 4DE, stands 13 m above it.
- Ground at eight in ten of its postcodes: between 15 m and 18 m, measured from Ordnance Datum; the middle one stands at 16 m.
- None lies in the Environment Agency's Flood Zone 3 from the sea.
- Mostly in Hackney; partly in Islington.