Lower Connecticut River Valley County GIS Maps
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Lower Connecticut River Valley County, Connecticut, has 174,983 residents across 83,770 parcels and covers 424.1 square miles. The FIPS code for Lower Connecticut River Valley County is 09130. Middletown is the county's largest population center. Lower Connecticut River Valley County also includes 26 zip codes, 12 public school districts and 18 municipalities. Those boundaries help explain why population, schools, and housing can look different from one part of the county to another. The map below shows how those county lines, zip codes, and school districts fit together, and the sections that follow use that same geography to show parcel data, population, demographics, school enrollment and housing patterns in more detail.
Maps, GIS layers, Parcels and sample data. Paid packages add full layers, analytics and database files.
Lower Connecticut River Valley County Trends
- Population
- 174,983—
- Median Home Value
- $359,000▴
- K-12 Enrollment
- 17,233▾
County analytics dashboards with historical trends & projections included in package downloads.
Free starter access previews county maps, lightweight GIS, and sample data. Paid packages unlock full GIS layers, analytics, and database files.
Lower Connecticut River Valley County Maps
The maps below show a few of the county map styles included in our downloads. County packages include map exports in JPEG, PNG, SVG, PDF and GeoTIFF formats plus more than 20 GIS layers for mapping, research and analysis. Available layers include zip codes, area codes, subdivisions, school districts, political boundaries, roads, water features, points of interest and more.
County packages also include historical county demographics, business intelligence, analytical dashboards, AI-ready prompts, markdown files and related reference data. Everything is organized to save hours of manual work collecting current data, cleaning it and joining it together. That makes it easier to move faster on analytics, due diligence, business planning and location research. Paid packages are built for commercial use, but some package contents include source-specific attribution or notice guidance. Review Licensing & Data Source Notices.
Lower Connecticut River Valley County Parcels
Lower Connecticut River Valley County has 83,770 mapped parcels. The median assessed value is $205,520. The median lot size is 0.77 acres. 4,046 parcels are 10 acres or larger. Single family homes account for 25.5% of parcels. Residential follows at 11.0%. Of the parcels with a recorded build year, half were built in 1970 or earlier. The records carry 31,742 distinct owner names. About 4% of parcels list an owner mailing address outside Connecticut. Owner names reach 97.7%. Mailing addresses reach 97.6%. Browse the interactive Lower Connecticut River Valley County Parcel viewer here.
Lower Connecticut River Valley County Parcel Data Coverage
| Field | Parcels | Coverage |
|---|---|---|
| Parcel ID | 83,966 | 100% |
| Owner name | 82,018 | 97.7% |
| Owner mailing address | 81,939 | 97.6% |
| Site address | 70,859 | 84.4% |
| Land use code | 82,021 | 97.7% |
| Land use description | 81,979 | 97.6% |
| Assessed value | 82,020 | 97.7% |
| Land value | 82,029 | 97.7% |
| Improvement value | 82,030 | 97.7% |
| Acreage | 73,760 | 87.8% |
| Parcel boundary | 83,770 | 99.8% |
| Download all Lower Connecticut River Valley County parcels. | ||
Field coverage measured across all Lower Connecticut River Valley County parcel records.
Lower Connecticut River Valley County Population
Lower Connecticut River Valley County had 174,983 residents in 2020. Recent census data shows how the county has changed over time. Long-term census counts show how the county has changed across recent decades. Middletown is the largest city in the county, with about 47,717 residents. Some of the county's most populated postal areas include Middletown, Cromwell and Clinton.
Population Trend in Lower Connecticut River Valley County CT
Lower Connecticut River Valley County Population per 2000, 2010 and 2020 census counts with a baseline 2030 projection.
Lower Connecticut River Valley County Zip Codes
Lower Connecticut River Valley County has 26 zip codes. Some of the county's most populated zip codes include Middletown (06457), Cromwell (06416) and Clinton (06413). The largest zip areas account for a meaningful share of the county population. Together, the three largest zips account for about 0% of all county residents based on 2020 population estimates.
Most Populated Zip Codes in Lower Connecticut River Valley County CT
| ZIP | Area | Population | Trend |
|---|---|---|---|
| 06457 | Middletown | 46,505 | ▾ -2.4% |
| 06416 | Cromwell | 14,225 | ▴ 1.6% |
| 06413 | Clinton | 13,161 | ▾ -0.6% |
| 06424 | East Hampton | 12,403 | ▾ -3.2% |
| 06475 | Old Saybrook | 10,481 | ▴ 2.3% |
| Download all zip code data | |||
Lower Connecticut River Valley County Zip Code populations and trends per most recent census data.
Lower Connecticut River Valley County Demographics
Lower Connecticut River Valley County has a median age of 45.8, which makes the county a little older than Connecticut overall. About 17% of residents are under 18, while 21.6% are 65 or older. That gives the county a fairly even mix of younger families and older adults. The largest age group is 25 to 44 at about 29.1% of the population, which points to a solid working-age base. About 45.5% of adults have a bachelor's degree or higher, above the statewide figure of 41.9%. The county is majority White by population, with Hispanic, Asian, Black and multiracial residents making up a meaningful share of the local mix.
Key Demographics for Lower Connecticut River Valley County CT
Median Age
45.8
Under 18
17%
Age 65+
21.6%
Bachelor's+
45.5%
Lower Connecticut River Valley County School Districts
Lower Connecticut River Valley County is served by 12 public school districts with 17,233 students enrolled in 2024. The largest districts on the county map are Middletown, Cromwell and Regional 17. Those three districts account for about 45% of public school enrollment in the map area. Total enrollment has stayed fairly steady in recent years, but it is slightly lower than it was in 2017.
Largest School Districts by Enrollment in Lower Connecticut River Valley County CT
| District | Enrollment | Share | Trend |
|---|---|---|---|
| Middletown School District | 4,263 | 24.7% | ▾ -1% |
| Cromwell School District | 1,816 | 10.5% | ▾ -3.6% |
| Regional School District 17 | 1,704 | 9.9% | ▾ -3.1% |
| East Hampton School District | 1,661 | 9.6% | ▾ -3.8% |
| Clinton School District | 1,423 | 8.3% | ▾ -2.1% |
| Download all school district data | |||
Lower Connecticut River Valley County school district enrollment and trends per most recent NCES reporting data.
Lower Connecticut River Valley County Housing & Real Estate
Lower Connecticut River Valley County has a median home value of $359,000 and a median gross rent of $1,399. About 75% of occupied homes in the county are owner-occupied, so the local housing market leans heavily toward ownership. Home values run below the Connecticut median, while rents come in below the state average. In March 2026, the median listing price was $612,475 and homes spent about 50 days on the market.
Lower Connecticut River Valley County Housing Mix
Lower Connecticut River Valley County housing mix: owner, renter and vacant units.
Lower Connecticut River Valley County Housing Trends
Lower Connecticut River Valley County median home value and rent trend (last 5 years).
Businesses in Lower Connecticut River Valley County, CT
Lower Connecticut River Valley County has 8,569 business listings across 835 categories. The largest categories in Lower Connecticut River Valley County business listings are Contractors (146, 1.7%), Churches & Religious Organizations (132, 1.5%), and Real Estate Agents (126, 1.5%). The full Lower Connecticut River Valley County business listings dataset includes names, categories, addresses and contact details where available. Lower Connecticut River Valley County packages also include U.S. Census County Business Patterns data with establishment counts, employment and payroll by industry sector.
Top Business Categories in Lower Connecticut River Valley County, CT
| Category | Businesses | Share |
|---|---|---|
| Contractors | 146 | 1.7% |
| Churches & Religious Organizations | 132 | 1.5% |
| Real Estate Agents | 126 | 1.5% |
| Parks & Recreation | 118 | 1.4% |
| Landmark And Historical Building | 102 | 1.2% |
| Restaurants | 100 | 1.2% |
| Farm | 96 | 1.1% |
| Community & Nonprofits | 96 | 1.1% |
| Professional Services | 95 | 1.1% |
| Gas Stations | 94 | 1.1% |
Lower Connecticut River Valley County Business Listings
| Business | Category | City |
|---|---|---|
| Paramount Wellness Retreat | Abuse And Addiction Treatment | Haddam |
| Wesleyan Argus Offices | Academic Bookstore | Middletown |
| Middle Town Ridge | Accommodation | Middletown |
| Northern Business Solutions | Accountant | Cromwell |
| Devil's Hopyard Waterfall | Active Life | East Haddam |
| On Point Acupuncture and Chinese Herbal Medicine | Acupuncture | Old Saybrook |
| Addiction Treatment Clinton | Addiction Rehabilitation Center | Clinton |
| Variety Video Adult Boutique | Adult Entertainment | Old Saybrook |
| Pearls and Plaids | Adult Store | Old Saybrook |
| Comstock Marketing Services | Advertising Agency | Cromwell |
| Download Lower Connecticut River Valley County business listings | ||
Lower Connecticut River Valley County business listings sourced from Overture Maps. Includes locations with a high level of confidence.
Lower Connecticut River Valley County Basemaps
Lower Connecticut River Valley County map and data packages include a set of useful basemaps to help you get started quickly. These include a custom light grey canvas, USGS topo, imagery and other reference layers that make it easier to build clear, meaningful county maps using the included GIS layers, your own data or both. Pre-rendered map tiles for the light grey basemap are included so you can use them offline or host them on your own CDN.
Get the Full Lower Connecticut River Valley County Data Package
This page shows a preview of what's included in the Lower Connecticut River Valley County data package. The full package gives you a ready-to-use county data system with GIS layers, historical data, maps, database files and planning tools that save hours of manual data gathering, cleanup and joins. Everything is organized to help you skip data wrangling and start analysis faster.
- 20+ GIS layers for parcels, zip codes, school districts, roads, water, boundaries and more
- Historical county demographics, housing, income and trend data
- ZIP code population files and school district enrollment history
- Database files, markdowns, AI-ready prompts and documentation
- Map exports in PNG, JPEG, PDF, SVG and GeoTIFF formats
- Offline-ready data explorer, map and analytics tools
Paid packages support commercial use, client work, and derived outputs. Some package contents may include source-specific attribution or provider notices. See Licensing & Data Source Notices.
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Nearby Counties
Browse county data pages for the counties that border Lower Connecticut River Valley County. These nearby pages include the same mix of county maps, demographic summaries, school district context, housing trends and package links.