# Three Mile Water D3

East Antrim and Newtownabbey. 460 people (mid-2024 estimate) in 0.1 square kilometres.

Three Mile Water D3 had 493 usual residents at the census (NISRA Census 2021).

Neighbourhood. Code N20000136. In: [Northern Ireland](https://openindex.co.uk/northern-ireland) › [Antrim and Newtownabbey](https://openindex.co.uk/antrim-and-newtownabbey)

## Key figures

- **Population: 493** (2021). Three Mile Water D3 had 493 usual residents at the census (NISRA Census 2021). Joint 2,385th least populated of 46,844. Source: Census 2021, England and Wales and Scotland's Census 2022 and Census 2021, Northern Ireland, 2021. Published 21 July 2026. https://openindex.co.uk/antrim-and-newtownabbey/neighbourhood/n20000136#f-population
- **Gigabit broadband coverage: 100.0%** (January 2026). In Three Mile Water D3, 100.0% of homes and businesses could get gigabit-capable broadband in January 2026 (Ofcom). UK 87.8%. Source: Connected Nations (Ofcom), January 2026. Published 13 May 2026. https://openindex.co.uk/antrim-and-newtownabbey/neighbourhood/n20000136#f-gigabit-coverage
- **Aged 15 to 64: 49.1%** (2021). 49.1% of residents in Three Mile Water D3 were aged 15 to 64 at the census (NISRA Census 2021). Joint 593rd lowest of 46,844. Source: Census 2021, England and Wales and Scotland's Census 2022 and Census 2021, Northern Ireland, 2021. Published 21 July 2026. https://openindex.co.uk/antrim-and-newtownabbey/neighbourhood/n20000136#f-age-15-to-64
- **Aged 65 and over: 43.8%** (2021). 43.8% of residents in Three Mile Water D3 were aged 65 or over at the census (NISRA Census 2021). Joint 266th highest of 46,844. Source: Census 2021, England and Wales and Scotland's Census 2022 and Census 2021, Northern Ireland, 2021. Published 21 July 2026. https://openindex.co.uk/antrim-and-newtownabbey/neighbourhood/n20000136#f-age-65-and-over

## On the map

- [Gigabit coverage by neighbourhood](https://openindex.co.uk/map/gigabit-broadband#place=N20000136) (Connected Nations (Ofcom) · January 2026): In Three Mile Water D3, 100.0% of homes and businesses could get gigabit-capable broadband in January 2026.
- [Average house price by council](https://openindex.co.uk/map/house-prices#place=N20000136) (UK House Price Index · August 2026): Published for whole councils, so the map colours all of Antrim and Newtownabbey. The outline is Three Mile Water D3.
- [Crime and ASB by neighbourhood](https://openindex.co.uk/map/recorded-crime#place=N20000136) (Police recorded crime and outcomes (data.police.uk) · August 2026): Police recorded 2 crimes and anti-social behaviour incidents in Three Mile Water D3 in August 2026.
- [Population by neighbourhood](https://openindex.co.uk/map/population#place=N20000136) (Census 2021, England and Wales): Three Mile Water D3 had 493 usual residents at the census.

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 Three Mile Water D3. [See deprivation across Antrim and Newtownabbey](https://openindex.co.uk/antrim-and-newtownabbey/deprivation)

## How Three Mile Water D3 compares

Each neighbourhood against every other neighbourhood the measure covers.

| Measure | Three Mile Water D3 | Rank | Compared with |
| --- | --- | --- | --- |
| Population | 493 | joint 135th most populated | 294 neighbourhoods, Antrim and Newtownabbey · 2021 |
| Gigabit broadband coverage | 100.0% | joint highest | 294 neighbourhoods, Antrim and Newtownabbey · Jan 2026 |
| Aged 15 to 64 | 49.1% | 4th lowest | 294 neighbourhoods, Antrim and Newtownabbey · 2021 |
| Aged 65 and over | 43.8% | highest | 294 neighbourhoods, Antrim and Newtownabbey · 2021 |

## What is the population of Three Mile Water D3?

Three Mile Water D3 had 493 usual residents at the census.
Three Mile Water D3 is the joint 2,385th least populated of 46,844 in the UK.

## Figures for the whole of Antrim and Newtownabbey

These figures are published for the whole of Antrim and Newtownabbey, not for each neighbourhood, so they describe all of Antrim and Newtownabbey and not Three Mile Water D3 alone. [See Antrim and Newtownabbey](https://openindex.co.uk/antrim-and-newtownabbey)

- **Average house price: £206,120** (August 2026). Antrim and Newtownabbey’s average house price was £206,120 in August 2026 (HM Land Registry). Up 8.8% in a year. Source: UK House Price Index, August 2026. Published 21 October 2026.
- **Population estimate: 148,487** (2025). Antrim and Newtownabbey’s population was an estimated 148,487 in mid-2025 (ONS population estimates). Up 0.3% in a year. Source: Mid-year population estimates, 2025. Published 1 October 2026.
- **Female life expectancy: 82.5 years** (2022 to 2024). A baby girl born in Antrim and Newtownabbey could expect to live 82.5 years, based on deaths in 2022 to 2024 (ONS life expectancy). UK 83.0 years. Source: Life expectancy for local areas of the UK, 2022 to 2024. Published 10 December 2025.
- **People in radon Affected Area squares: 14%** (2022). About 14% of people in Antrim and Newtownabbey live in a 1 km square that the radon atlas marks as a radon Affected Area. UK 44%. Source: Worked out by Open Index from the UKHSA and BGS radon atlas and census output areas. Published 1 December 2022.

## Three Mile Water D3 in brief

Three Mile Water D3 had 493 usual residents at the census.
In Three Mile Water D3, 100.0% of homes and businesses could get gigabit-capable broadband in January 2026.
49.1% of residents in Three Mile Water D3 were aged 15 to 64 at the census.
43.8% of residents in Three Mile Water D3 were aged 65 or over at the census.

## About

- Type: Neighbourhood
- Code: N20000136
- Middle area: [Three Mile Water D](https://openindex.co.uk/antrim-and-newtownabbey/three-mile-water-d)
- Ward: [Ballyduff †](https://openindex.co.uk/antrim-and-newtownabbey/ward/ballyduff)
- Constituency: [South Antrim †](https://openindex.co.uk/constituency/south-antrim)
- Council: [Antrim and Newtownabbey](https://openindex.co.uk/antrim-and-newtownabbey)
- Nation: [Northern Ireland](https://openindex.co.uk/northern-ireland)
- Area: 0.15 km²
- People, mid-2024: 460

† Best fit: the ward and constituency this neighbourhood mostly lies in. Its edges do not follow theirs.

## Next door

[Three Mile Water B3](https://openindex.co.uk/antrim-and-newtownabbey/neighbourhood/n20000139), [Three Mile Water D2](https://openindex.co.uk/antrim-and-newtownabbey/neighbourhood/n20000135), [Three Mile Water F1](https://openindex.co.uk/antrim-and-newtownabbey/neighbourhood/n20000142), [Three Mile Water H1](https://openindex.co.uk/antrim-and-newtownabbey/neighbourhood/n20000148), [Three Mile Water F2](https://openindex.co.uk/antrim-and-newtownabbey/neighbourhood/n20000145), [Ballyclare F5](https://openindex.co.uk/antrim-and-newtownabbey/neighbourhood/n20000121)

## Latest updates for Three Mile Water D3

- August 2026 house prices published: HM Land Registry and partners · Oct 2026.
- September 2026 rent published: ONS private rents · Oct 2026.
- Nitrogen dioxide (NO2) updated: Defra · Oct 2026.
- 2025 population published: ONS population estimates · Oct 2026.

The same figures as JSON: https://openindex.co.uk/v1/places/N20000136

## How to cite

Source: Open Index, openindex.co.uk. Link to this page, https://openindex.co.uk/antrim-and-newtownabbey/neighbourhood/n20000136, or to one figure with its anchor, https://openindex.co.uk/antrim-and-newtownabbey/neighbourhood/n20000136#f-population.

Open Index's own text and the figures it works out are licensed under CC BY 4.0 (https://creativecommons.org/licenses/by/4.0/). Source data keeps its publishers' licences, named with each figure. Give each figure's period and source with it.

Snapshot 2026.10.11. The HTML page: https://openindex.co.uk/antrim-and-newtownabbey/neighbourhood/n20000136