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US ZIP Code Profile

ZIP Code 06878
Riverside, Connecticut

ZIP code 06878 is in Riverside, located in Fairfield County, Connecticut, within the Bridgeport-Stamford-Norwalk metro area. Its 2020 Census population was 8,519. The estimated median adjusted gross income per tax return is $171,277, and about 46% of filers report $200,000 or more.

2020 Population
8,519
Census ZCTA
County
Fairfield
FIPS 09001
Median income (est.)
$171,277
IRS SOI 2022
Land Area
2.398 mi²
+ 0.806 mi² water

01Location & Geography

Authoritative geographic identifiers from the U.S. Census Bureau, ANSI, and FIPS standards.

Primary CityRiverside, CT
CountyFairfield County (FIPS 09001)
StateConnecticut (FIPS 09)
Metro Area (MSA)Bridgeport-Stamford-Norwalk, CT Metro Area (14860)
Census Region / DivisionNortheast Region · New England Division
Coordinates41.030094, -73.58372
Land / Water Area2.398 mi² land · 0.806 mi² water

02Income & Economics

Distribution of the 3,770 individual tax returns filed in 06878 by adjusted gross income bracket (IRS SOI, 2022).

< $25K
19.9%
$25K–$50K
8.5%
$50K–$75K
7.2%
$75K–$100K
5.6%
$100K–$200K
12.5%
$200K+
46.4%
The $200,000+ bracket accounts for 96% of 06878's total adjusted gross income, from 46% of returns — a concentration that drives the gap between the median ($171,277) and the average.
Estimated median = median adjusted gross income per tax return, interpolated from IRS SOI brackets. Differs from U.S. Census household income.

03Income Over Time

Year-over-year change in 06878's IRS income metrics, 2020–2022.

Median income (2021→2022)
$171,277
▲ 5.2%
Filers earning $200K+
46.4%
▲ 1.0 pt
Total filers
3,770
▼ 0.5%
GET /zipc/v2/zipcodes/06878/soi?year=… $140K 2020 $163K 2021 $171K 2022
Median = adjusted gross income per return, interpolated from IRS SOI brackets. Figures are nominal (not inflation-adjusted).

04Population Trend

Decennial U.S. Census population for the 06878 ZCTA.

2000
7,724
 
2010
8,043
▲ +4.1%
2020
8,519
▲ +5.9%

05Nearby ZIP Codes — Live Radius Search

Drag the slider to filter ZIP codes by distance from 06878. Powered by the same radius endpoint developers call from the API.

GET /zipc/v2/radius

ZIP codes within range of 06878

Riverside and its immediate neighbors, sorted by distance.

3 mi
GET /zipc/v2/distance

Distance from 06878 to any ZIP

Enter a 5-digit ZIP to calculate the distance.

06USPS Postal Details

Delivery and facility attributes from the monthly USPS dataset.

ZIP ClassificationNon-Unique Zip
Facility TypePost Office
Carrier Route SortB
USPS Finance Number086426
City AliasesRiverside

07Frequently Asked Questions

What county is ZIP code 06878 in?

ZIP code 06878 is in Fairfield County, Connecticut (county FIPS code 09001).

What city is ZIP code 06878?

The primary USPS city for 06878 is Riverside, CT.

What metro area (MSA) is 06878 in?

06878 is part of the Bridgeport-Stamford-Norwalk, CT Metro Area (MSA code 14860).

What is the population of ZIP code 06878?

The 2020 Census population of 06878 was 8,519 residents.

What is the median income in ZIP code 06878?

Based on IRS Statistics of Income data, the estimated median adjusted gross income per tax return in 06878 is about $171,277, with around 46% of filers reporting $200,000 or more. Note that adjusted gross income is a tax measure and differs from U.S. Census household income.