EC2N: 6.0 m clear of the highest tide in the London Bridge ledgers

The lowest postcode in EC2N, EC2N 2HE, stands 6.0 m above the highest tide in the London Bridge ledgers (5.41 m, 1 February 1953). The highest, EC2N 1JJ, stands 12 m above it.
- Ground at eight in ten of its postcodes: between 12 m and 16 m, measured from Ordnance Datum; the middle one stands at 13 m.
- None lies in the Environment Agency's Flood Zone 3 from the sea.
- Mostly in City of London; partly in Islington.