Ranking of US Counties By Percentage of Population with Iranian Ancestry in 2021
Updated on March 2, 2025.
Based on the US Census ACS-5Yrs estimates, in 2021, among all US counties with a population of at least 50K, Orange County, CA had the highest percentage of population with Iranian ancestry (1.03%), followed by Santa Clara County, CA (1.00%), and Montgomery County, MD (0.88%).
The chart below shows the top 10 counties with high percentage of population with Iranian ancestry, and the table below shows the ranking of the top 200 counties.
You can see similar information for other ancestry groups in the US.
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Related Topics: US Census 2021 Topic List.
Data Source: US Census Bureau.
Ranking of US Counties By Percentage of Population with Iranian Ancestry in 2021
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| Rank | County | Percentage of Pop. |
|---|---|---|
| 1 | Orange County, CA | 1.03 |
| 2 | Santa Clara County, CA | 1.00 |
| 3 | Montgomery County, MD | 0.88 |
| 3 | Fairfax County, VA | 0.88 |
| 4 | Los Angeles County, CA | 0.85 |
| 5 | Loudoun County, VA | 0.83 |
| 6 | San Mateo County, CA | 0.74 |
| 7 | Nassau County, NY | 0.69 |
| 8 | Contra Costa County, CA | 0.68 |
| 9 | Marin County, CA | 0.67 |
| 10 | Collin County, TX | 0.61 |
| 11 | Howard County, MD | 0.55 |
| 12 | San Diego County, CA | 0.52 |
| 13 | Washington County, OR | 0.51 |
| 14 | Placer County, CA | 0.50 |
| 15 | Arlington County, VA | 0.48 |
| 16 | Randall County, TX | 0.46 |
| 17 | Ventura County, CA | 0.45 |
| 18 | San Francisco County, CA | 0.44 |
| 19 | Alameda County, CA | 0.43 |
| 19 | King County, WA | 0.43 |
| 20 | Centre County, PA | 0.38 |
| 21 | Orange County, NC | 0.37 |
| 22 | Alachua County, FL | 0.36 |
| 23 | Yolo County, CA | 0.35 |
| 24 | Sacramento County, CA | 0.34 |
| 24 | Santa Cruz County, CA | 0.34 |
| 24 | Bowie County, TX | 0.34 |
| 25 | Stanislaus County, CA | 0.33 |
| 25 | Fulton County, GA | 0.33 |
| 25 | New York County, NY | 0.33 |
| 26 | Cobb County, GA | 0.32 |
| 26 | Tippecanoe County, IN | 0.32 |
| 26 | Madison County, MS | 0.32 |
| 27 | El Dorado County, CA | 0.29 |
| 27 | Cleveland County, OK | 0.29 |
| 27 | Denton County, TX | 0.29 |
| 28 | Garfield County, CO | 0.28 |
| 28 | Forsyth County, GA | 0.28 |
| 28 | Clark County, IN | 0.28 |
| 28 | Otero County, NM | 0.28 |
| 28 | Clackamas County, OR | 0.28 |
| 29 | Washtenaw County, MI | 0.27 |
| 30 | Twin Falls County, ID | 0.26 |
| 30 | Williamson County, TN | 0.26 |
| 30 | Harris County, TX | 0.26 |
| 30 | Montgomery County, VA | 0.26 |
| 30 | Alexandria city, VA | 0.26 |
| 30 | Benton County, WA | 0.26 |
| 30 | Monongalia County, WV | 0.26 |
| 31 | Monroe County, IN | 0.25 |
| 31 | Middlesex County, MA | 0.25 |
| 31 | Prince William County, VA | 0.25 |
| 32 | Boulder County, CO | 0.24 |
| 32 | Story County, IA | 0.24 |
| 32 | Portage County, OH | 0.24 |
| 32 | Snohomish County, WA | 0.24 |
| 33 | Santa Barbara County, CA | 0.23 |
| 33 | Champaign County, IL | 0.23 |
| 33 | Johnson County, KS | 0.23 |
| 33 | Salt Lake County, UT | 0.23 |
| 34 | Douglas County, CO | 0.22 |
| 34 | Clark County, NV | 0.22 |
| 34 | Fort Bend County, TX | 0.22 |
| 34 | Travis County, TX | 0.22 |
| 35 | San Luis Obispo County, CA | 0.21 |
| 35 | Grand Forks County, ND | 0.21 |
| 35 | Brazos County, TX | 0.21 |
| 36 | Denver County, CO | 0.20 |
| 36 | Fayette County, KY | 0.20 |
| 36 | Baltimore County, MD | 0.20 |
| 36 | Baltimore city, MD | 0.20 |
| 36 | Bergen County, NJ | 0.20 |
| 36 | Oklahoma County, OK | 0.20 |
| 36 | Payne County, OK | 0.20 |
| 37 | Sonoma County, CA | 0.19 |
| 37 | Bannock County, ID | 0.19 |
| 37 | DuPage County, IL | 0.19 |
| 37 | Davidson County, TN | 0.19 |
| 38 | Norfolk County, MA | 0.18 |
| 38 | Washoe County, NV | 0.18 |
| 38 | Wake County, NC | 0.18 |
| 38 | Multnomah County, OR | 0.18 |
| 38 | Galveston County, TX | 0.18 |
| 38 | Hays County, TX | 0.18 |
| 38 | Albemarle County, VA | 0.18 |
| 38 | Ozaukee County, WI | 0.18 |
| 39 | Ascension Parish, LA | 0.17 |
| 39 | Suffolk County, MA | 0.17 |
| 39 | Somerset County, NJ | 0.17 |
| 39 | Sumner County, TN | 0.17 |
| 39 | Spotsylvania County, VA | 0.17 |
| 40 | Humboldt County, CA | 0.16 |
| 40 | Shasta County, CA | 0.16 |
| 40 | Black Hawk County, IA | 0.16 |
| 40 | Johnson County, IA | 0.16 |
| 40 | Butler County, KS | 0.16 |
| 40 | Frederick County, MD | 0.16 |
| 40 | St. Mary's County, MD | 0.16 |
| 40 | Williamson County, TX | 0.16 |
| 40 | Henrico County, VA | 0.16 |
| 40 | York County, VA | 0.16 |
| 40 | Kanawha County, WV | 0.16 |
| 41 | Marshall County, AL | 0.15 |
| 41 | Riverside County, CA | 0.15 |
| 41 | Yuba County, CA | 0.15 |
| 41 | Arapahoe County, CO | 0.15 |
| 41 | Broomfield County, CO | 0.15 |
| 41 | Lake County, IL | 0.15 |
| 41 | Oldham County, KY | 0.15 |
| 41 | Hampshire County, MA | 0.15 |
| 41 | Bernalillo County, NM | 0.15 |
| 41 | Albany County, NY | 0.15 |
| 41 | Brazoria County, TX | 0.15 |
| 41 | Waller County, TX | 0.15 |
| 42 | Maricopa County, AZ | 0.14 |
| 42 | Fresno County, CA | 0.14 |
| 42 | Tuolumne County, CA | 0.14 |
| 42 | Tolland County, CT | 0.14 |
| 42 | Seminole County, FL | 0.14 |
| 42 | Gwinnett County, GA | 0.14 |
| 42 | Mecklenburg County, NC | 0.14 |
| 42 | Pottawatomie County, OK | 0.14 |
| 42 | Tarrant County, TX | 0.14 |
| 42 | Chittenden County, VT | 0.14 |
| 42 | Richmond city, VA | 0.14 |
| 42 | Clark County, WA | 0.14 |
| 43 | Madison County, AL | 0.13 |
| 43 | Pinal County, AZ | 0.13 |
| 43 | Napa County, CA | 0.13 |
| 43 | San Joaquin County, CA | 0.13 |
| 43 | Clarke County, GA | 0.13 |
| 43 | Douglas County, KS | 0.13 |
| 43 | Franklin County, KY | 0.13 |
| 43 | Orleans Parish, LA | 0.13 |
| 43 | Anne Arundel County, MD | 0.13 |
| 43 | Boone County, MO | 0.13 |
| 43 | Queens County, NY | 0.13 |
| 43 | Rensselaer County, NY | 0.13 |
| 43 | Jackson County, OR | 0.13 |
| 43 | Yamhill County, OR | 0.13 |
| 43 | Dallas County, TX | 0.13 |
| 44 | Washington County, AR | 0.12 |
| 44 | Solano County, CA | 0.12 |
| 44 | Orange County, FL | 0.12 |
| 44 | Cook County, IL | 0.12 |
| 44 | Hennepin County, MN | 0.12 |
| 44 | Olmsted County, MN | 0.12 |
| 44 | St. Louis city, MO | 0.12 |
| 44 | Kings County, NY | 0.12 |
| 44 | Tompkins County, NY | 0.12 |
| 44 | Westchester County, NY | 0.12 |
| 44 | Franklin County, OH | 0.12 |
| 44 | Coos County, OR | 0.12 |
| 44 | Polk County, OR | 0.12 |
| 44 | Chester County, PA | 0.12 |
| 44 | Lackawanna County, PA | 0.12 |
| 44 | Bexar County, TX | 0.12 |
| 44 | Rockwall County, TX | 0.12 |
| 44 | Harrisonburg city, VA | 0.12 |
| 44 | Whatcom County, WA | 0.12 |
| 45 | Shelby County, AL | 0.11 |
| 45 | Coconino County, AZ | 0.11 |
| 45 | Pima County, AZ | 0.11 |
| 45 | Monterey County, CA | 0.11 |
| 45 | San Benito County, CA | 0.11 |
| 45 | San Bernardino County, CA | 0.11 |
| 45 | Monroe County, FL | 0.11 |
| 45 | Sarasota County, FL | 0.11 |
| 45 | Cherokee County, GA | 0.11 |
| 45 | Jackson County, IL | 0.11 |
| 45 | Penobscot County, ME | 0.11 |
| 45 | Ingham County, MI | 0.11 |
| 45 | Essex County, NJ | 0.11 |
| 45 | Delaware County, OH | 0.11 |
| 45 | Wood County, OH | 0.11 |
| 45 | Tulsa County, OK | 0.11 |
| 45 | Lane County, OR | 0.11 |
| 45 | Montgomery County, PA | 0.11 |
| 45 | Hamilton County, TN | 0.11 |
| 45 | Knox County, TN | 0.11 |
| 45 | Washington County, TN | 0.11 |
| 45 | Montgomery County, TX | 0.11 |
| 45 | Dane County, WI | 0.11 |
| 46 | Tuscaloosa County, AL | 0.10 |
| 46 | Anchorage Municipality, AK | 0.10 |
| 46 | Merced County, CA | 0.10 |
| 46 | Hillsborough County, FL | 0.10 |
| 46 | Manatee County, FL | 0.10 |
| 46 | Palm Beach County, FL | 0.10 |
| 46 | Jefferson County, KY | 0.10 |
| 46 | Oakland County, MI | 0.10 |
| 46 | Cole County, MO | 0.10 |
| 46 | Morris County, NJ | 0.10 |
| 46 | Ulster County, NY | 0.10 |
| 46 | Chatham County, NC | 0.10 |
| 46 | Durham County, NC | 0.10 |
| 46 | Canadian County, OK | 0.10 |
| 46 | Wagoner County, OK | 0.10 |
| 46 | Delaware County, PA | 0.10 |
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