Middlesex
Source:
Connecticut
Middlesex is a mid-size county in Connecticut with 22 ZIP codes, 164,856 people, and top-decile household income among US counties. All data is sourced from the U.S. Census Bureau American Community Survey (ACS) 2023 5-Year Estimates.
National county placement
According to ACS 5-Year Estimates, Middlesex, CT sits among US counties with a top-decile household income, on a mid-size county population base, across a multi-ZIP patchwork.
- Top 4%
- household income vs 3,210 US counties
- 164,856
- combined ZIP population
- 22
- USPS ZIP codes covered
- $112,344
- avg ZIP median income
Income percentile ranks this county's average ZIP median household income against 3,210 US counties with ACS income on at least one ZIP.
Middlesex lands in the national county income distribution as top-decile household income on mid-size county footing (FIPS 09007, 22 ZIPs, combined population 164,856). Sort the ZIP table by population before treating the county mean as uniform.
High-income counties with wide ZIP mosaics hide sharp internal gradients. The densest ZIP here is 06457 (Middletown) with 47,648 residents - open it beside a thin rural code from the table before treating the county mean as uniform. HUD Fair Market Rents and FBI county tables attach to FIPS 09007, so scorecards stay county-keyed while household income stays ZIP-keyed.
Save two ZIPs from the table into your shortlist, then open a compare link - that is the return path a static county summary cannot replace. All figures here come from Census ACS 2023 5-Year Estimates and USPS ZCTA files.
22
Total ZIPs
164,856
Total Population
ZIP Codes in Middlesex
Side-by-side: Compare 06457 vs 06416 →
| ZIP Code | City | Population | Density |
|---|---|---|---|
| 06457 | Middletown | 47,648 | 449 |
| 06416 | Cromwell | 14,005 | 466 |
| 06413 | Clinton | 13,235 | 316 |
| 06424 | East Hampton | 12,808 | 123 |
| 06475 | Old Saybrook | 10,242 | 263 |
| 06480 | Portland | 9,508 | 157 |
| 06422 | Durham | 7,388 | 121 |
| 06498 | Westbrook | 6,963 | 170 |
| 06419 | Killingworth | 6,525 | 71 |
| 06441 | Higganum | 5,438 | 81 |
| 06423 | East Haddam | 5,097 | 51 |
| 06417 | Deep River | 4,629 | 132 |
| 06412 | Chester | 3,994 | 96 |
| 06426 | Essex | 3,245 | 219 |
| 06469 | Moodus | 3,209 | 123 |
| 06455 | Middlefield | 3,148 | 112 |
| 06442 | Ivoryton | 2,745 | 318 |
| 06438 | Haddam | 2,550 | 80 |
| 06481 | Rockfall | 1,277 | 274 |
| 06409 | Centerbrook | 693 | 198 |
| 06456 | Middle Haddam | 295 | 131 |
| 06414 | Cobalt | 214 | 285 |
Frequently Asked Questions
What is the population of Middlesex?
Middlesex has a total population of 164,856 across 22 ZIP codes, based on U.S. Census Bureau ACS 2023 data.
What ZIP codes are in Middlesex?
Middlesex includes 22 ZIP codes: 06457, 06416, 06413, 06424, 06475, 06480, 06422, 06498, 06419, 06441, and more.