Northwest Hills Planning Region, Connecticut
A planning region in Connecticut, ranked 8 of 9 by population.
Planning RegionFIPS 09160
- Population
- 114,690
- +2,484 (+2.2%) since 2020
- Land area
- 786.6
- square miles. A further 2.7% of the total area is water
- Population density
- 146
- people per square mile, computed rather than published
- County seat
- Not available
- Northwest Hills Planning Region has no county government.
- Established
- Not available
- Largest city
- Torrington city
- Population 35,796.
Sources: US Census Bureau, Population Estimates Program, Vintage 2025 Population Estimates, released 26 March 2026; US Census Bureau, Gazetteer Files, 2025 Gazetteer Files, released 10 September 2025; Wikidata (CC0), Wikidata. Retrieved 30 August 2026.
Satellite view
Aerial imagery of Northwest Hills Planning Region with its boundary drawn on top. A map shows you the shape; this shows you what is inside it, and which side of the line a place falls on.
Where Northwest Hills Planning Region ranks
Position among the 9 planning regions of Connecticut, and among all 3,144 US counties and county-equivalents. Computed from the figures on this page.
| Measure | Value | In Connecticut | Nationally |
|---|---|---|---|
| Population | 114,690 | 8th of 9 | 561st of 3,144 |
| Land area | 786.6 sq mi | 2nd of 9 | 1,097th of 3,144 |
| Population density | 146 per sq mi | 9th of 9 | 710th of 3,144 |
| Median household income | $93,551 | 3rd of 9 | 240th of 3,143 |
Full data for Northwest Hills Planning Region
| Measure | Value | Source and vintage |
|---|---|---|
| Population | 114,690 | Vintage 2025 Population Estimates |
| Population in 2020 | 112,206 | Vintage 2025 Population Estimates |
| 2020 estimates base? | 112,463 | Vintage 2025 Population Estimates |
| Land area | 786.6 sq mi | 2025 Gazetteer Files |
| Water area | 21.5 sq mi | 2025 Gazetteer Files |
| Total area | 808.1 sq mi | 2025 Gazetteer Files |
| Population density? | 146 per sq mi | Computed: Vintage 2025 estimates divided by 2025 Gazetteer land area |
| Median household income | $93,551 | American Community Survey 2020-2024 5-Year Estimates |
| Median home value | $335,600 | American Community Survey 2020-2024 5-Year Estimates |
| Median age | 47.1 | American Community Survey 2020-2024 5-Year Estimates |
| Households | 47,845 | American Community Survey 2020-2024 5-Year Estimates |
| Housing units | 55,752 | American Community Survey 2020-2024 5-Year Estimates |
Sources: US Census Bureau, Population Estimates Program, Vintage 2025 Population Estimates, released 26 March 2026; US Census Bureau, Gazetteer Files, 2025 Gazetteer Files, released 10 September 2025; US Census Bureau, American Community Survey, American Community Survey 2020-2024 5-Year Estimates, released 29 January 2026. Population density is computed here, not published: it divides the Vintage 2025 population estimate by the 2025 Gazetteer land area, which are two different Census products. Retrieved 30 August 2026.
How the population changed
The Census Bureau publishes the components behind an estimate, not just the total. For the year to July 2025:
- Births minus deaths
- -241
- 914 births, 1,155 deaths
- Net migration
- +656
- More people moved in than moved out.
Source: US Census Bureau, Population Estimates Program, Vintage 2025 Population Estimates, released 26 March 2026. Retrieved 30 August 2026.
The 6 areas bordering Northwest Hills Planning Region
Ordered by the length of the border actually shared, which the Census Bureau publishes in its county adjacency file and which no other county reference presents.
| Bordering area | State | Shared border | Population |
|---|---|---|---|
| Naugatuck Valley Planning Region | Connecticut | 35 mi | 463,349 |
| Capitol Planning Region | Connecticut | 27 mi | 994,115 |
| Dutchess County | New York | 26 mi | 300,708 |
| Berkshire County | Massachusetts | 22 mi | 128,224 |
| Western Connecticut Planning Region | Connecticut | 21 mi | 640,482 |
| Hampden County | Massachusetts | 9.8 mi | 464,338 |
Source: US Census Bureau, County Adjacency File, 2025 County Adjacency File, released 15 September 2025. Retrieved 30 August 2026.
All 9 planning regions of Connecticut
Open the interactive Connecticut county map, or jump straight to any of them.
- Capitol Planning Region
- Greater Bridgeport Planning Region
- Lower Connecticut River Valley Planning Region
- Naugatuck Valley Planning Region
- Northeastern Connecticut Planning Region
- Northwest Hills Planning Region
- South Central Connecticut Planning Region
- Southeastern Connecticut Planning Region
- Western Connecticut Planning Region
Data on this page last rebuilt 30 August 2026. How these figures are produced.