Riva, MD 21140 ZIP Code Profile

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Riva, MD

ZIP Code 21140: Basic Data & USPS Preferred City Name

Preferred Name, USPS
Riva, MD 21140

  • ZIP Code Type: STANDARD
  • County: Anne Arundel County
  • Centroid: Latitude 38.952, Longitude -76.587
  • Time Zone: Eastern Time Zone (UTC -5 hours)
  • Observes DST: Yes
  • Businesses Addresses: 78
  • PO Box Addresses: 127
  • Residential Addresses: 1,313
    • Multi-Family Addresses: 1
    • Single Family Addresses: 1,312

The ZIP Code maps and database are updated 4 times per year.
Database updated: May 1, 2018, Maps updated: February 1, 2018.

EXTREMELY LOCAL Demographic Data

Address Based Hyperlocal Data Input an address and get data & demographics for the pertinent census block group (CBG), a searchable map and a customized directory. The CBG is the smallest geographical unit used by the Census Bureau for reporting demographic data.


21140 ZIP Code Map

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Riva, MD 21140 Data & Demographics (As of July 1, 2017)


Total Population 3,554
Daytime Population: Workers 730
Daytime Population: Residents 1,623
Total Daytime Population (TDP) 2,353
Ratio TDP/Total Population1 0.66
Population in Households 3,554
Population in Familes 3,100
Population in Group Qrtrs 0
Population Density2 2,342
Diversity Index3 20


Median Household Income $121,381
Average Household Income $156,605
Per Capita Income $58,914


Total Housing Units 1,391 (100%)
Owner Occupied HU 1,194 (85.8%)
Renter Occupied HU 143 (10.3%)
Vacant Housing Units 54 ( 3.9%)
Median Home Value $464,317
Average Home Value $524,058


Total Households 1,337
Average Household Size 2.66
Family Households 1,034
Average Family Size 3
  1. If the ratio of the TDP to Total Population is greater than 1, the location gains population during the day when commuting workers are present. If the ratio is less than 1, the location is more of a bedroom community where people commute to another place for work.
  2. Population Density = Total Population per square mile.
  3. The Diversity Index is a scale of 0 to 100 that represents the likelihood that two persons, chosen at random from the same area, belong to different race or ethnic groups. If an area's entire population belongs to one race AND one ethnic group, then the area has zero diversity. An area's diversity index increases to 100 when the population is evenly divided into two or more race/ethnic groups.


2010-2017 2017-2022
Population 0.47% 0.63%
Households 0.33% 0.53%
Families 0.23% 0.42%
Median Household Income   1.65%
Per Capita Income   1.99%

Riva, MD 21140 - Peer Comparisons by Rank and Percentile

The table below compares 21140 to the other 456 ZIP Codes in Maryland by rank and percentile using July 1, 2017 data. The location Ranked # 1 has the highest value. A location that ranks higher than 75% of its peers would be in the 75th percentile of the peer group.

Variable Description Rank Percentile
Total Population # 261 43rd
Population Density # 102 78th
Diversity Index # 370 19th
Median Household Income # 43 91st
Per Capita Income # 41 91st

Additional comparisons and rankings can be made with a VERY EASY TO USE Maryland Census Data Comparison Tool.

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