Castle J3
NeighbourhoodNorth Belfast. 367 people (mid-2024 estimate) in 0.1 square kilometres.
Gigabit coverage by neighbourhood
Connected Nations (Ofcom) · January 2026
In Castle J3, 100.0% 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 J3. See deprivation across Belfast
How Castle J3 compares
Each dot is a neighbourhood. The black line marks the middle one.
What is the population of Castle J3?
Castle J3 had 371 usual residents at the census.
Castle J3 is the joint 694th least populated of 46,844 in the UK.
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 J3 alone. See Belfast
Castle J3 in brief
Castle J3 had 371 usual residents at the census.
In Castle J3, 100.0% of homes and businesses could get gigabit-capable broadband in January 2026.
61.7% of residents in Castle J3 were aged 15 to 64 at the census.
23.7% of residents in Castle J3 were aged 65 or over at the census.