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About this map

The chance that two residents picked at random belong to different racial or ethnic groups. 0 means everyone is in the same group; 50+ is very mixed. The U.S. overall scores about 61.

Source: U.S. Census Bureau, American Community Survey 5-year estimates (2020–2024).

U.S.
61.4
Maryland
67.7
Rankings
Full list

Top and bottom zip codes in Maryland

Zip codes with 1,000+ residents

Most diverse zip codes

See all
  1. 120874Germantown77.3
  2. 220876Germantown76.6
  3. 320879Gaithersburg76.5
  4. 420906Silver Spring76.1
  5. 520886Montgomery Village76.1
  6. 620740College Park75.9
  7. 720905Silver Spring75.5
  8. 820723Laurel74.9
  9. 921075Elkridge73.7
  10. 1020871Clarksburg73.6

Least diverse zip codes

See all
  1. 121719Cascade0
  2. 221555Oldtown2.2
  3. 321521Barton2.4
  4. 421536Grantsville2.6
  5. 521912Warwick3.6
  6. 620688Solomons4.3
  7. 721530Flintstone4.5
  8. 821562Westernport5.7
  9. 921782Sharpsburg8.2
  10. 1021780Sabillasville8.5

Diversity index by county in Maryland

  1. 1Montgomery County74.1
  2. 2Howard County70.3
  3. 3Charles County65.1
  4. 4Baltimore County63.6
  5. 5Prince George's County59.6
  6. 6Somerset County58.9
  7. 7Wicomico County58.6
  8. 8Baltimore city58.1
  9. 9Anne Arundel County57.3
  10. 10Dorchester County56.2
  11. 11Frederick County53.6
  12. 12St. Mary's County47.7
  13. 13Harford County46.1
  14. 14Caroline County44.8
  15. 15Washington County44
  16. 16Calvert County43.6
  17. 17Talbot County43
  18. 18Kent County40
  19. 19Worcester County37.6
  20. 20Cecil County34.3
  21. 21Queen Anne's County31.1
  22. 22Carroll County28.1
  23. 23Allegany County25.7
  24. 24Garrett County10.2

Questions about this map

Which zip code has the highest diversity index in Maryland?

Among zip codes with at least 1,000 residents, 20874 (Germantown, MD) has the highest: 77.3.

Which zip code has the lowest diversity index in Maryland?

21719 (Cascade, MD) has the lowest: 0.

What is the diversity index for the United States?

61.4; in Maryland it is 67.7.

Where does this data come from?

U.S. Census Bureau, American Community Survey 5-year estimates (2020–2024). The chance that two residents picked at random belong to different racial or ethnic groups. 0 means everyone is in the same group; 50+ is very mixed. The U.S. overall scores about 61.

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