Castle J4
NeighbourhoodNorth Belfast. 604 people in 0.1 square kilometres.
Gigabit coverage by neighbourhood
Connected Nations (Ofcom) · January 2026
In Castle J4, 99.7% of homes and businesses could get gigabit-capable broadband in January 2026.
Northern Ireland Multiple Deprivation Measure 2017 is published for the Super Output Areas (2001), whose boundaries differ from this neighbourhood’s, so it has no figure for Castle J4. See deprivation across Belfast
How Castle J4 compares
Each dot is a neighbourhood. The black line marks the middle one.
Figures for the whole of Belfast
These figures are published for the whole of Belfast, not for each neighbourhood, so they describe all of Belfast and not Castle J4 alone. See Belfast
Castle J4 in brief
Castle J4 had 613 usual residents at the census.
In Castle J4, 99.7% of homes and businesses could get gigabit-capable broadband in January 2026.
59.7% of residents in Castle J4 were aged 15 to 64 at the census.
21.9% of residents in Castle J4 were aged 65 or over at the census.