Which county has the highest irish population?

Cook County, Illinois ranks #1 with 523,306 (2010 Decennial Census).

What are the top 5 counties by irish population?

Cook County, Illinois, Los Angeles County, California, Maricopa County, Arizona, Middlesex County, Massachusetts, Suffolk County, New York.

How many counties are in this ranking?

3,130 counties qualify after filtering for population minimums and data availability. The ranking covers 2010 Decennial Census data.

How is irish population measured?

Number of residents who are Irish ancestry (Ancestry, ACS detailed tables). Source: US Census Bureau, 2010 Decennial Census.

RANKING · 2010 CENSUS · 500 SHOWN OF 3,130

Largest Irish population, US counties · 2010

US counties ranked by the number of residents who are Irish ancestry, from the 2010 American Community Survey detailed-origin tables. Each list covers the full eligible universe; download the complete data as CSV.

Irish Americans: full group profile →

All statesAll rankings

SAME RANKING BYCities States Metros

YEAR2010 2020 2024

RANKPLACESTATEPOPIRISH POPULATIONVS –

501Wyandotte County, KSKS170,59714,724–

502Wayne County, OHOH116,75814,717–

503Bossier Parish, LALA131,86714,692–

504Wright County, MNMN157,55914,613–

505Stafford County, VAVA170,80314,509–

506Adams County, PAPA107,59414,505–

507Hunt County, TXTX123,33614,492–

508Linn County, OROR132,84314,475–

509Dorchester County, SCSC178,39714,443–

510Newport News, VAVA183,23014,391–

511Tompkins County, NYNY104,04714,348–

512Macon County, ILIL99,30014,304–

513Napa County, CACA132,94914,289–

514Randall County, TXTX152,35114,225–

515Fairbanks North Star, AKAK93,97214,213–

516Franklin County, MAMA70,69814,188–

517Platte County, MOMO114,40014,148–

518Rutland County, VTVT59,65314,062–

519Herkimer County, NYNY59,21914,052–

520Pennington County, SDSD116,79214,038–

521Brunswick County, NCNC174,70213,978–

522Sumter County, FLFL157,77213,923–

523Richmond County, GAGA206,55913,904–

524Ouachita Parish, LALA158,54213,889–

525Bay County, MIMI102,12313,856–

526Washington County, NYNY59,35313,852–

527Laramie County, WYWY102,93813,825–

528Miami County, OHOH112,63413,801–

529Madison County, NYNY67,12013,797–

530Bradley County, TNTN115,46513,746–

531Cascade County, MTMT85,02913,744–

532Henderson County, NCNC122,37513,716–

533Fayette County, GAGA125,15613,685–

534Lapeer County, MIMI89,51613,640–

535Taylor County, TXTX150,07713,582–

536Gregg County, TXTX126,09513,572–

537Aiken County, SCSC181,51513,543–

538Washington County, TNTN141,19913,535–

539Salem County, NJNJ66,28013,535–

540Hays County, TXTX304,39013,526–

541Clinton County, NYNY78,13813,491–

542Armstrong County, PAPA63,69813,475–

543Allen County, OHOH100,88113,434–

544Pitt County, NCNC182,93613,424–

545Craven County, NCNC105,02513,419–

546Alamance County, NCNC186,17713,342–

547Saline County, ARAR133,28813,312–

548Muskingum County, OHOH87,01413,282–

549Richmond, VAVA237,25713,244–

550Wichita County, TXTX129,55513,242–

551Cass County, NDND201,79413,241–

552Flathead County, MTMT115,42913,212–

553Wicomico County, MDMD106,89913,200–

554Calhoun County, ALAL115,83413,164–

555Yuma County, AZAZ224,44913,162–

556Highlands County, FLFL111,12213,159–

557Skagit County, WAWA132,97513,135–

558Kaufman County, TXTX209,23513,101–

559Vigo County, ININ106,51213,045–

560Comanche County, OKOK122,15813,004–

561Warren County, KYKY149,37512,982–

562Madison County, KYKY101,69612,957–

563Columbia County, GAGA169,18912,955–

564Merced County, CACA297,26012,914–

565Stearns County, MNMN164,11012,862–

566Wilson County, TNTN175,03312,851–

567Hardin County, KYKY113,48212,817–

568Josephine County, OROR87,86712,787–

569Leavenworth County, KSKS84,59012,782–

570Pike County, PAPA62,80812,772–

571Hanover County, VAVA116,42312,748–

572Grand Traverse County, MIMI96,72912,743–

573Wayne County, PAPA51,70312,685–

574Coconino County, AZAZ144,36812,654–

575Matanuska-Susitna, AKAK118,66612,639–

576Flagler County, FLFL140,36012,625–

577Coweta County, GAGA160,24012,622–

578Belmont County, OHOH64,43412,599–

579Aroostook County, MEME66,60912,572–

580Harrison County, WVWV64,22112,552–

581Fond du Lac County, WIWI104,66912,514–

582Hawaii County, HIHI210,04312,478–

583Belknap County, NHNH65,14712,445–

584Etowah County, ALAL103,88612,415–

585Craighead County, ARAR116,95712,399–

586Comal County, TXTX209,16612,329–

587Columbia County, NYNY60,16812,327–

588Houston County, GAGA178,21412,299–

589Albemarle County, VAVA118,35612,232–

590Carroll County, GAGA131,03612,231–

591Weber County, UTUT278,17412,183–

592Allegan County, MIMI123,18812,090–

593Washington County, UTUT213,67012,085–

594Lafayette Parish, LALA257,94912,044–

595Jefferson County, OHOH63,59711,989–

596Randolph County, NCNC149,51611,947–

597Santa Fe County, NMNM156,90711,914–

598Rapides Parish, LALA125,87711,910–

599Roanoke County, VAVA97,15011,910–

600Floyd County, GAGA101,37811,907–

601Lewis and Clark County, MTMT75,33111,894–

602Montgomery County, VAVA98,43411,887–

603Scioto County, OHOH71,36511,874–

604Carroll County, NHNH52,78411,812–

605Hinds County, MSMS211,88811,796–

606Yamhill County, OROR110,02411,796–

607Wood County, WVWV82,38511,790–

608Otsego County, NYNY60,58911,787–

609Erie County, OHOH73,29611,783–

610Tangipahoa Parish, LALA141,34611,782–

611Ross County, OHOH76,42911,779–

612Daviess County, KYKY104,89811,722–

613Midland County, MIMI83,75411,644–

614Mendocino County, CACA88,12211,641–

615Lake County, CACA67,77211,631–

616Isabella County, MIMI64,69111,618–

617Sandoval County, NMNM159,56511,571–

618Marshall County, ALAL103,53711,552–

619Rogers County, OKOK102,19711,552–

620Carver County, MNMN114,37911,506–

621Guadalupe County, TXTX201,11111,499–

622Ozaukee County, WIWI94,34611,493–

623Creek County, OKOK74,96711,475–

624Rowan County, NCNC155,09611,426–

625Genesee County, NYNY58,41611,417–

626Benton County, OROR97,72811,344–

627Williamson County, ILIL67,22511,336–

628Burke County, NCNC88,65511,312–

629Island County, WAWA85,65711,263–

630White County, ARAR80,08511,261–

631Lauderdale County, ALAL97,13511,231–

632Bristol County, RIRI50,00111,200–

633Natrona County, WYWY80,52611,196–

634Grundy County, ILIL54,05211,192–

635Van Buren County, MIMI76,07111,161–

636Lowndes County, GAGA122,86711,105–

637Story County, IAIA101,29111,105–

638Catoosa County, GAGA69,62811,099–

639Lewis County, WAWA88,06211,086–

640Eau Claire County, WIWI109,03311,084–

641Floyd County, ININ82,15311,068–

642St. Croix County, WIWI98,27611,043–

643Silver Bow County, MTMT36,11811,030–

644St. Francois County, MOMO67,80911,001–

645Shiawassee County, MIMI67,68110,967–

646Whitfield County, GAGA106,21210,959–

647Douglas County, GAGA154,29310,944–

648Allegany County, MDMD66,84810,931–

649Bullitt County, KYKY86,45410,901–

650Northumberland County, PAPA89,92010,837–

651Harnett County, NCNC150,13710,799–

652Anderson County, TNTN82,06610,766–

653Houston County, ALAL110,31810,690–

654Frederick County, VAVA99,95510,687–

655Hidalgo County, TXTX921,54910,680–

656Payne County, OKOK83,88910,665–

657Morgan County, ININ74,96710,663–

658Bowie County, TXTX92,69610,601–

659Carbon County, PAPA65,86810,600–

660Marathon County, WIWI139,43210,541–

661Nassau County, FLFL106,87910,504–

662Queen Anne's County, MDMD54,44810,496–

663Walker County, ALAL65,14010,493–

664Potter County, TXTX114,45310,482–

665Clearfield County, PAPA78,10010,388–

666Walker County, GAGA70,25010,383–

667Washington County, OHOH58,38910,380–

668Clarke County, GAGA129,92110,380–

669Madera County, CACA167,92710,333–

670Sheboygan County, WIWI118,04710,326–

671Bradford County, PAPA59,60010,296–

672Sevier County, TNTN101,34210,283–

673Midland County, TXTX187,85510,262–

674Oconee County, SCSC83,77510,252–

675Bibb County, GAGA157,55610,252–

676Delaware County, NYNY44,30510,183–

677Montgomery County, ALAL225,89110,165–

678Fulton County, NYNY52,21610,129–

679Mercer County, WVWV57,50310,123–

680Marion County, OHOH65,11510,108–

681Maury County, TNTN118,13110,063–

682Marion County, WVWV55,58410,035–

683Kings County, CACA154,32710,001–

684Clinton County, MIMI80,43210,001–

685Navajo County, AZAZ109,94610,000–

686Lincoln County, NCNC98,65410,000–

687Limestone County, ALAL122,9289,977–

688Elmore County, ALAL91,5779,960–

689Walton County, GAGA112,6969,943–

690Bulloch County, GAGA86,9499,938–

691Venango County, PAPA49,3469,899–

692Columbia County, FLFL74,0949,884–

693Angelina County, TXTX88,1549,865–

694Windsor County, VTVT57,3129,833–

695Dallas County, IAIA118,4579,819–

696Monroe County, FLFL80,4069,803–

697Fauquier County, VAVA76,5039,792–

698Orange County, TXTX86,2669,778–

699Klamath County, OROR70,2749,762–

700Grays Harbor County, WAWA78,1449,760–

701Lee County, MSMS83,7319,753–

702Bartow County, GAGA120,8009,749–

703Cape Girardeau County, MOMO83,9999,722–

704Dodge County, WIWI89,0979,696–

705Windham County, VTVT45,2049,682–

706Sherburne County, MNMN104,1949,673–

707Pope County, ARAR64,9769,655–

708Riley County, KSKS72,5989,640–

709McCracken County, KYKY67,5539,599–

710Umatilla County, OROR81,1199,598–

711Lonoke County, ARAR76,6649,588–

712DeKalb County, ALAL74,0859,549–

713Dearborn County, ININ51,6099,509–

714Somerset County, PAPA72,0049,494–

715Dickson County, TNTN58,6629,474–

716Hancock County, ININ90,9699,434–

717Taney County, MOMO57,0019,404–

718Franklin County, NYNY46,5009,398–

719Boyd County, KYKY47,7519,374–

720Doña Ana County, NMNM229,0919,368–

721Wayne County, NCNC122,2789,352–

722Allegany County, NYNY46,8009,350–

723Lincoln County, MOMO66,6769,337–

724Tehama County, CACA64,6659,322–

725St. Clair County, ALAL98,2069,307–

726Worcester County, MDMD54,4599,296–

727Bartholomew County, ININ85,7299,281–

728Susquehanna County, PAPA38,2379,267–

729Butler County, KSKS69,4849,244–

730Christian County, MOMO96,7259,226–

731Tom Green County, TXTX120,6029,204–

732Maui County, HIHI160,5929,169–

733Rockingham County, NCNC94,1959,162–

734Liberty County, TXTX121,3649,154–

735Grady County, OKOK59,1289,141–

736Tioga County, NYNY47,4539,130–

737Wagoner County, OKOK93,2639,121–

738Greene County, NYNY47,2389,113–

739Whiteside County, ILIL54,1219,102–

740Sutter County, CACA98,7879,065–

741Florence County, SCSC138,5049,049–

742Athens County, OHOH63,1979,043–

743Oldham County, KYKY70,9869,040–

744Hampton, VAVA137,3159,024–

745Warrick County, ININ66,8039,014–

746Madison County, TNTN100,7908,999–

747Tuolumne County, CACA53,1608,997–

748Columbia County, PAPA66,1938,986–

749Ascension Parish, LALA135,1058,968–

750Newton County, GAGA125,5838,949–

751Rutherford County, NCNC65,7458,934–

752Clallam County, WAWA78,2028,920–

753Clinton County, IAIA46,0028,881–

754Kosciusko County, ININ80,8928,867–

755Ionia County, MIMI66,5578,840–

756Mayes County, OKOK40,4168,822–

757James City County, VAVA83,3268,808–

758Cortland County, NYNY45,8508,790–

759Caldwell County, NCNC81,1058,786–

760Glynn County, GAGA87,5998,785–

761Sauk County, WIWI66,6528,782–

762Jefferson County, WIWI86,5058,772–

763Coles County, ILIL46,6078,769–

764Adams County, ILIL64,2678,767–

765Columbia County, WIWI58,1328,766–

766Essex County, NYNY36,4388,753–

767Moore County, NCNC110,6198,738–

768Montcalm County, MIMI69,4068,713–

769Huron County, OHOH58,2508,699–

770Jackson County, ILIL52,5018,681–

771Carteret County, NCNC70,4698,677–

772Crawford County, ARAR62,6578,657–

773Knox County, OHOH64,0028,654–

774Effingham County, GAGA74,3978,605–

775Oxford County, MEME60,3468,579–

776Roanoke, VAVA99,1118,565–

777Washington County, VTVT59,6528,555–

778Ohio County, WVWV40,4968,523–

779Cole County, MOMO77,9088,520–

780Johnson County, MOMO56,6708,518–

781Chenango County, NYNY45,7158,509–

782Greene County, TNTN73,8318,495–

783Howard County, ININ83,9048,466–

784Madison County, MSMS116,2988,445–

785Victoria County, TXTX92,6568,392–

786Washington County, OKOK54,0378,368–

787Grant County, WIWI52,4468,360–

788Wood County, WIWI74,0608,352–

789Vermilion County, ILIL71,2598,292–

790Hancock County, MEME57,1718,282–

791Somerset County, MEME51,6208,270–

792Hardin County, TXTX58,7238,249–

793Hancock County, OHOH75,0348,241–

794Pickaway County, OHOH62,9788,240–

795Wayne County, ININ66,1698,196–

796Ogle County, ILIL51,3998,172–

797Ector County, TXTX173,8018,142–

798Yuba County, CACA88,6918,135–

799Twin Falls County, IDID97,5398,121–

800York County, VAVA71,3748,107–

801Lawrence County, OHOH55,7108,076–

802Garfield County, COCO63,4748,052–

803Cleveland County, NCNC103,3258,049–

804Portage County, WIWI71,9438,043–

805Montgomery County, NYNY50,0468,038–

806Coos County, OROR63,9928,032–

807Lyon County, NVNV65,0888,004–

808Mason County, WAWA71,1657,976–

809Muskogee County, OKOK66,7087,932–

810Newton County, MOMO62,2637,923–

811Carson City, NVNV58,5717,922–

812Broomfield County, COCO79,1747,896–

813Knox County, ILIL47,7677,869–

814Bedford County, VAVA83,0597,864–

815Lynchburg, VAVA81,3477,852–

816Chippewa County, WIWI67,6147,849–

817Crow Wing County, MNMN69,1327,846–

818Calaveras County, CACA46,6057,843–

819Bonneville County, IDID135,7717,839–

820Nash County, NCNC99,3657,813–

821Macoupin County, ILIL43,7487,796–

822Robertson County, TNTN80,1757,749–

823Camden County, MOMO44,0477,740–

824Boone County, ININ80,6897,740–

825Baxter County, ARAR42,9827,739–

826Union County, OHOH73,4467,737–

827Wayne County, WVWV37,3097,736–

828McMinn County, TNTN57,4047,732–

829Haywood County, NCNC63,3697,732–

830Reno County, KSKS61,5397,728–

831La Plata County, COCO56,8987,726–

832Franklin County, VTVT51,1777,706–

833Garfield County, OKOK61,7797,704–

834Hood County, TXTX70,5017,692–

835Huntingdon County, PAPA43,0017,686–

836Van Zandt County, TXTX66,1307,684–

837Rice County, MNMN69,9397,654–

838Polk County, OROR90,0377,652–

839Knox County, MEME41,1177,602–

840Orleans County, NYNY39,8257,575–

841San Juan County, NMNM120,3407,574–

842McKean County, PAPA38,9847,566–

843Nacogdoches County, TXTX66,0357,551–

844Blue Earth County, MNMN70,6347,503–

845Troup County, GAGA72,8447,499–

846Marquette County, MIMI68,0647,494–

847Manitowoc County, WIWI81,7107,492–

848Blount County, ALAL60,1567,476–

849Bannock County, IDID91,5917,474–

850Anderson County, TXTX59,8057,469–

851Laurel County, KYKY63,7467,448–

852Greene County, PAPA33,8857,445–

853Osage County, OKOK46,7947,441–

854Pittsburg County, OKOK43,3207,441–

855Cass County, MIMI51,6777,434–

856Warren County, IAIA57,3317,414–

857Henderson County, TXTX88,5957,408–

858Pulaski County, KYKY67,3847,397–

859Franklin County, ILIL36,9167,396–

860Sandusky County, OHOH58,6557,388–

861Henry County, ILIL48,0957,370–

862Washington County, VAVA53,8987,358–

863Schoharie County, NYNY30,1767,351–

864Boone County, ILIL53,5687,349–

865Lamar County, TXTX51,5037,329–

866Putnam County, FLFL77,7347,326–

867Walla Walla County, WAWA62,3617,310–

868Pike County, KYKY54,7217,302–

869Polk County, TXTX53,4347,288–

870Franklin County, KYKY52,6497,263–

871Portsmouth, VAVA96,7777,238–

872Pearl River County, MSMS59,3637,227–

873Bastrop County, TXTX118,9087,225–

874Tazewell County, VAVA38,6357,220–

875Alcorn County, MSMS34,5697,192–

876Burnet County, TXTX57,0157,167–

877Jessamine County, KYKY57,1477,166–

878Stephens County, OKOK44,3107,155–

879Fayette County, WVWV38,1657,140–

880Forrest County, MSMS79,0347,139–

881Carter County, TNTN57,3617,125–

882Sullivan County, NHNH43,9617,119–

883Barry County, MIMI63,9917,118–

884Barrow County, GAGA99,7737,116–

885Kenai Peninsula, AKAK61,9517,115–

886Amador County, CACA41,8767,114–

887Madison County, OHOH46,9857,075–

888Columbia County, OROR54,0917,071–

889Talladega County, ALAL81,6037,061–

890Coryell County, TXTX85,5927,055–

891Colbert County, ALAL59,4747,041–

892Grant County, ININ66,5247,039–

893Rockdale County, GAGA98,4167,035–

894Tuscola County, MIMI52,6807,030–

895Vernon Parish, LALA45,0917,029–

896Butler County, MOMO41,9047,025–

897Christian County, KYKY70,1157,019–

898Douglas County, NVNV50,1116,994–

899Coffee County, TNTN62,4196,981–

900McDowell County, NCNC45,1986,975–

901Bennington County, VTVT36,6306,974–

902Hillsdale County, MIMI45,7386,971–

903Rusk County, TXTX54,8546,957–

904Jackson County, GAGA99,2656,912–

905Tipton County, TNTN62,2876,908–

906Ward County, NDND68,2336,884–

907Roane County, TNTN57,3956,878–

908Cameron County, TXTX433,9466,874–

909Campbell County, WYWY48,1456,860–

910Chisago County, MNMN59,1426,852–

911Greenup County, KYKY35,2136,838–

912Pottawatomie County, OKOK75,1026,825–

913Talbot County, MDMD38,2386,813–

914Pontotoc County, OKOK38,5286,806–

915Lee County, ILIL32,9146,770–

916Wyoming County, NYNY39,7416,765–

917Clayton County, GAGA297,4716,752–

918Perry County, PAPA46,8066,747–

919Des Moines County, IAIA38,0776,736–

920Lawrence County, ININ45,5686,726–

921Livingston County, ILIL35,0576,720–

922Kerr County, TXTX54,0376,711–

923Lincoln County, OROR50,6366,707–

924Callaway County, MOMO45,7656,705–

925Raleigh County, WVWV71,7756,705–

926Siskiyou County, CACA42,0136,696–

927Watauga County, NCNC54,7866,693–

928Le Flore County, OKOK50,1966,692–

929Waldo County, MEME40,6936,638–

930Upshur County, TXTX44,4106,630–

931Jefferson County, PAPA43,2556,630–

932Lauderdale County, MSMS70,3176,621–

933Wood County, TXTX49,6886,609–

934Webster County, IAIA36,8386,599–

935Kay County, OKOK43,4906,589–

936Hall County, NENE63,6336,586–

937Laurens County, SCSC71,8486,579–

938Mecosta County, MIMI42,3206,567–

939Surry County, NCNC72,2876,546–

940Putnam County, TNTN86,6126,535–

941Cherokee County, TXTX53,3376,532–

942Clarion County, PAPA36,6806,529–

943Rockwall County, TXTX140,7386,524–

944Clinton County, OHOH42,3016,521–

945Autauga County, ALAL61,9206,510–

946Boone County, ARAR38,6286,510–

947Seneca County, NYNY32,8836,509–

948Highland County, OHOH43,8236,507–

949Buffalo County, NENE51,1726,488–

950Suffolk, VAVA104,6996,482–

951Chatham County, NCNC85,1116,476–

952Eagle County, COCO54,2916,474–

953Nye County, NVNV57,3366,471–

954McCurtain County, OKOK30,7446,466–

955Cumberland County, TNTN66,3006,438–

956Scott County, KYKY62,2626,386–

957Ravalli County, MTMT48,5826,365–

958Suwannee County, FLFL48,1496,363–

959Grand Forks County, NDND74,5016,362–

960Lamar County, MSMS67,4036,356–

961Campbell County, VAVA55,6296,356–

962Augusta County, VAVA78,9406,354–

963Fremont County, COCO50,0396,342–

964Levy County, FLFL48,5206,340–

965Crawford County, OHOH41,8966,334–

966San Patricio County, TXTX72,0536,332–

967Brown County, OHOH44,3976,325–

968Addison County, VTVT38,0486,320–

969Pettis County, MOMO44,2546,317–

970Jefferson County, WVWV63,1026,316–

971Greenbrier County, WVWV31,5786,306–

972Jackson County, ALAL54,2816,305–

973Saline County, KSKS53,3776,303–

974Winona County, MNMN50,5236,300–

975Harrison County, TXTX71,9566,300–

976Pulaski County, MOMO54,4426,273–

977Marion County, ILIL36,3826,270–

978Stone County, MOMO32,5036,247–

979Preble County, OHOH40,6646,223–

980Wapello County, IAIA35,2106,223–

981Franklin County, TNTN45,5796,216–

982Bonner County, IDID54,4206,211–

983Jefferson County, ILIL36,1476,195–

984Logan County, OHOH46,3026,191–

985Shelby County, KYKY51,2436,190–

986Jefferson County, ARAR62,9876,186–

987St. Joseph County, MIMI60,9686,159–

988Waupaca County, WIWI51,4616,156–

989Kittitas County, WAWA48,8036,139–

990Lincoln County, MEME36,5956,137–

991Guernsey County, OHOH38,3796,133–

992Stevens County, WAWA49,6686,112–

993Sumter County, SCSC105,0676,090–

994Loudon County, TNTN63,7646,084–

995Greene County, ARAR47,4116,072–

996Monroe County, TNTN49,7306,071–

997Grant County, WAWA105,7276,071–

998Hamblen County, TNTN68,8436,068–

999Logan County, WVWV30,3756,059–

1000Culpeper County, VAVA57,6666,056–

SHOWING 501–1,000 OF 3,130

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UPDATED 2026-09-11 · DATA: US CENSUS BUREAU DECENNIAL CENSUS