Residential delivery area · Connecticut
ZIP Code 06878: Riverside, CT
ZIP code 06878 is in Riverside, Connecticut, entirely in Fairfield County (Census 2020 ZIP-county file). About 8,300 people live there (Census Bureau, ACS 2020-2024). Median household income is $250,000 or more (Census Bureau, ACS 2020-2024).
- ACS2020-24
- Census2020
- FHFA2022
- ZBP2023
- IRS2022
- Town
- Riverside · its only residential ZIP
- County
- Fairfield County
- Census places
- Riverside census-designated place
- House district
- CT-4 119th Congress
- State
- Connecticut
- Time zone
- Eastern
- Land area
- 2.4 sq mi · 3,444 people per sq mi
Where is ZIP code 06878?
06878 centers on 41.030°, -73.584° and covers 2.4 square miles of land plus 0.8 of water. It borders 3 ZIP codes: 06870, 06807, 06830.
The map draws ZIP code areas only. For the streets inside 06878, open its center on OpenStreetMap.
Source: U.S. Census Bureau, 2020 ZCTA cartographic boundaries and the 2023 Gazetteer (2020 ZCTAs); ZIP-to-county shares, Census places and House districts (119th Congress) from the Census 2020 relationship files (shares of land); metro area from the OMB delineation (July 2023); town name and time zone from simplemaps US ZIP Codes (CC BY 4.0).
How does 06878 compare with the rest of Fairfield County?
| Measure | 06878 | In Fairfield County | In CT |
|---|---|---|---|
| People (ACS 2020-2024) | 8,328 | 39th of 46 | 144th of 288 |
| Median household income | $250k+ | 1= of 45 | 1= of 228 |
| Median home value | $1.97M | 1st of 46 | 1st of 245 |
1= means a shared first place: 06878's median household income ties with 6 other ZIP codes at the Census cap in Fairfield County; median household income ties with 6 other ZIP codes at the Census cap in Connecticut.
Its median household income is at the Census cap of $250,000 or more, like 117 other U.S. residential ZIP codes (69 of the 118 are large enough to rank), and it is denser than 90% of all U.S. residential ZIP codes. ZIP codes at the ACS caps ($250,000 or more for household income, $2,000,000 or more for home value) share the top rank.
Source: U.S. Census Bureau, ACS 2020-2024 5-year estimates (B01003, B19013, B25077); ranks by PlainZIP over residential ZIP codes (ZCTAs).
How many people live in 06878?
The 2020 Census counted 8,519 people in 06878; the ACS, which samples households over 2020-2024, estimates 8,328. Between the 2010 and 2020 censuses its population grew 5.9% (its boundary stayed at least 90% the same).
- People, ACS 2020-2024
- 8,328
- 2020 Census count
- 8,519+5.9% since 2010 (8,043)
- Households
- 2,686
- Median age
- 41.8
Source: U.S. Census Bureau, ACS 2020-2024 5-year estimates (B01003, B01002, B11001); 2020 Census (DHC P1); 2010 Census (SF1 P1).
Who lives in 06878?
Of the 8,328 people the ACS estimates in 06878, 30.8% are under 18 and 14.6% are 65 or older. The largest group by race and Hispanic origin is White (not Hispanic) (61.9%), then Hispanic or Latino (15.6%).
- Under 1830.8%
- 18 to 6454.6%
- 65 and older14.6%
- White, not Hispanic61.9%
- Hispanic or Latino15.6%
- Asian, not Hispanic13.4%
- Other or two or more6.4%
- Black, not Hispanic2.8%
Source: U.S. Census Bureau, ACS 2020-2024 5-year estimates (B01001 age by sex, B03002 Hispanic or Latino origin by race); shares of the estimated population, small ZIP codes carry wide margins.
What do households in 06878 earn?
Median household income is $250,000 or more (ACS 2020-2024), the highest of the 45 ranked ZIP codes in Fairfield County.
By IRS adjusted gross income per tax return ($791,227, 2022), 06878 ranks 26th in the U.S. among ZIP codes of 1,000+ people with 200+ returns and at most 1.5 returns per household (see the ranking).
- Median household income
- $250,000 or more
- Income per person
- $147,326
- Below the poverty line
- 3.6%
- Unemployed (of the labor force)
- 5.7%
- Adults 25+ with a bachelor's degree
- 78.8%
- Adjusted gross income per tax return, 2022
- $791,2273,770 returns; wages 44% of AGI (IRS)
Source: U.S. Census Bureau, ACS 2020-2024 and 2015-2019 5-year estimates (B19013, B19301, B17001, B23025, B15003; 2015-2019 dollars converted with the BLS CPI-U, 1.22699); IRS Statistics of Income, ZIP code data, tax year 2022 (adjusted gross income per return, filed under the address on the return).
What are homes worth in 06878?
- Median home value (owners' estimate)
- $1,968,800
- Median gross rent
- $3,500 or more
- Homes owned by their occupants
- 82.6%
- Housing units
- 2,787
Source: U.S. Census Bureau, ACS 2020-2024 5-year estimates (B25077, B25064, B25003, B25001); FHFA House Price Index, annual five-digit ZIP, updated 2026-03-31.
What businesses are in 06878?
193 business establishments had a location in this ZIP code in 2023, 29 more than in 2018; the most are in professional, scientific, and technical services (ZIP Code Business Patterns).
- Professional, scientific, and technical services29
- Retail trade24
- Health care and social assistance22
- Finance and insurance21
- Accommodation and food services16
- Other services (except public administration)15
Source: U.S. Census Bureau, ZIP Code Business Patterns 2023 and 2018 (establishments with paid employees, by the business's ZIP code).
Which ZIP codes are next to 06878?
| ZIP | Town | People | Household income | Distance |
|---|---|---|---|---|
| 06870 | Old Greenwich | 7,864 | $250k+ | 0.8 mi |
| 06807 | Cos Cob | 7,650 | $192k | 1.9 mi |
| 06830 | Greenwich | 24,880 | $147k | 2.2 mi |
| 06901 | Stamford | 11,037 | $103k | 2.9 mi (near) |
| 06902 | Stamford | 73,392 | $95k | 2.9 mi (near) |
| 06906 | Stamford | 9,199 | $94k | 4.3 mi (near) |
| 06905 | Stamford | 20,725 | $137k | 4.5 mi (near) |
| 10573 | Port Chester, NY | 40,786 | $106k | 5.0 mi (near) |
Source: PlainZIP from the Census 2020 ZCTA boundaries (shared edges) and internal points; figures ACS 2020-2024.