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 –

2501Parmer County, TXTX9,678941–

2502Bradley County, ARAR9,828934–

2503Warren County, ININ8,474934–

2504Jack County, TXTX9,563933–

2505Worth County, IAIA7,338932–

2506Grant County, OROR7,075929–

2507Perquimans County, NCNC13,490926–

2508Daviess County, MOMO8,558925–

2509Barnes County, NDND10,573922–

2510Ferry County, WAWA7,517922–

2511Jackson County, MNMN9,857918–

2512Woodruff County, ARAR5,710917–

2513Lunenburg County, VAVA12,058917–

2514Watonwan County, MNMN11,459916–

2515Wilcox County, GAGA8,797916–

2516Coal County, OKOK5,436914–

2517Pawnee County, KSKS5,991912–

2518Valley County, MTMT7,385909–

2519Toole County, MTMT5,211908–

2520Alleghany County, NCNC11,479905–

2521Elliott County, KYKY7,265904–

2522Shelby County, MOMO5,870902–

2523Marion County, GAGA7,676902–

2524Schuyler County, ILIL6,657902–

2525Winnebago County, IAIA10,251902–

2526Irwin County, GAGA9,020901–

2527Norton County, KSKS5,288900–

2528Pointe Coupee Parish, LALA19,520899–

2529Stevens County, MNMN9,747897–

2530Ringgold County, IAIA4,642895–

2531Huerfano County, COCO7,011893–

2532Fall River County, SDSD7,467891–

2533Wilkinson County, MSMS7,582889–

2534Wayne County, IAIA6,738889–

2535Quay County, NMNM8,454886–

2536Redwood County, MNMN15,265885–

2537Pulaski County, GAGA10,172883–

2538Greenlee County, AZAZ9,312883–

2539Teton County, MTMT6,496883–

2540Brunswick County, VAVA15,727883–

2541Johnson County, GAGA9,310883–

2542Socorro County, NMNM15,838882–

2543Monroe County, KYKY11,191882–

2544Atchison County, MOMO5,175881–

2545Liberty County, FLFL8,035879–

2546Merrick County, NENE7,905878–

2547Brown County, ILIL6,401878–

2548Cherry County, NENE5,561878–

2549Kearney County, NENE6,790875–

2550Lamb County, TXTX12,579874–

2551Sullivan County, MOMO5,738874–

2552McLean County, KYKY9,064872–

2553Bertie County, NCNC17,086871–

2554Scott County, ILIL4,866871–

2555Northampton County, VAVA11,879870–

2556Haskell County, TXTX5,499868–

2557Schoolcraft County, MIMI8,187867–

2558Carter County, MOMO5,418858–

2559Morrill County, NENE4,404854–

2560Butler County, NENE8,507853–

2561Dallam County, TXTX7,508853–

2562Ellsworth County, KSKS6,257853–

2563Lafayette County, ARAR5,888850–

2564Pope County, ILIL3,672847–

2565Richmond County, VAVA9,294845–

2566Karnes County, TXTX15,018843–

2567Lee County, KYKY7,297841–

2568Lake County, TNTN6,249840–

2569Grant County, OKOK4,067840–

2570Bland County, VAVA6,151834–

2571Rooks County, KSKS4,646833–

2572Custer County, IDID4,636832–

2573Gentry County, MOMO6,384824–

2574Major County, OKOK7,536822–

2575Wolfe County, KYKY6,298821–

2576Kane County, UTUT8,597821–

2577Nevada County, ARAR7,942819–

2578Broadwater County, MTMT8,493819–

2579Lake County, COCO7,552815–

2580Hancock County, KYKY9,050811–

2581Pondera County, MTMT6,072810–

2582Bleckley County, GAGA12,866809–

2583Charlotte County, VAVA11,401808–

2584Storey County, NVNV4,260807–

2585Buena Vista, VAVA6,672804–

2586Cedar County, NENE8,373803–

2587Nottoway County, VAVA15,796803–

2588Kemper County, MSMS8,600802–

2589Greeley County, NENE2,154802–

2590Pembina County, NDND6,568799–

2591Cottonwood County, MNMN11,405798–

2592Moore County, TNTN6,920798–

2593Conecuh County, ALAL10,899796–

2594Mitchell County, KSKS5,590796–

2595Ramsey County, NDND11,530795–

2596Leslie County, KYKY9,627793–

2597Ward County, TXTX11,125792–

2598Gilpin County, COCO6,073791–

2599Nicholas County, KYKY7,949791–

2600Turner County, SDSD9,314790–

2601Cotton County, OKOK5,432788–

2602Brewster County, TXTX9,458783–

2603Calhoun County, ARAR4,632781–

2604Warren County, NCNC18,898780–

2605Craig County, VAVA4,800778–

2606Boise County, IDID8,545777–

2607Saguache County, COCO6,732775–

2608Luce County, MIMI6,339774–

2609Desha County, ARAR9,984772–

2610Hale County, ALAL15,194772–

2611Roger Mills County, OKOK3,259770–

2612Jefferson County, NENE7,070767–

2613Ohio County, ININ5,994764–

2614Dawson County, TXTX11,776764–

2615Charlton County, GAGA13,121763–

2616Grant County, KSKS7,028762–

2617Pecos County, TXTX14,560758–

2618Pipestone County, MNMN9,260756–

2619Kit Carson County, COCO7,069756–

2620Gates County, NCNC10,234755–

2621Coosa County, ALAL10,161754–

2622Ontonagon County, MIMI5,823752–

2623Chouteau County, MTMT5,865752–

2624Cumberland County, VAVA10,352751–

2625Cameron County, PAPA4,211748–

2626Taylor County, GAGA7,818748–

2627Baraga County, MIMI8,169742–

2628Childress County, TXTX6,643742–

2629Howard County, NENE6,538740–

2630Furnas County, NENE4,524735–

2631Chase County, NENE3,718733–

2632Pepin County, WIWI7,513729–

2633Meade County, KSKS3,852729–

2634Wheeler County, TXTX4,773727–

2635Knox County, MOMO3,728726–

2636Knox County, NENE8,335726–

2637Murray County, MNMN7,942725–

2638Clay County, NENE6,170724–

2639Beaver County, OKOK4,882724–

2640Hot Springs County, WYWY4,600723–

2641Talbot County, GAGA5,709722–

2642Dodge County, GAGA19,663722–

2643McCook County, SDSD5,964721–

2644Dewey County, OKOK4,207720–

2645Jefferson County, OKOK5,431719–

2646Mitchell County, TXTX8,947718–

2647Swisher County, TXTX6,703718–

2648Phillips County, KSKS4,728717–

2649Morris County, KSKS5,348716–

2650Wirt County, WVWV4,879713–

2651Yellow Medicine County, MNMN9,477712–

2652Mineral County, MTMT5,185710–

2653Ellis County, OKOK3,613710–

2654Williamsburg County, SCSC29,662710–

2655Alfalfa County, OKOK5,649706–

2656Colfax County, NENE10,934703–

2657Dallas County, ARAR6,011701–

2658Musselshell County, MTMT5,582699–

2659Fallon County, MTMT2,959698–

2660Sheridan County, NENE4,809696–

2661Quitman County, MSMS5,364695–

2662Marshall County, MNMN8,798692–

2663Early County, GAGA10,455690–

2664Martin County, TXTX5,284685–

2665Custer County, COCO5,590685–

2666Beaver County, UTUT7,301683–

2667Clinton County, KYKY9,139682–

2668Jefferson Davis County, MSMS10,941680–

2669Bacon County, GAGA11,070679–

2670Lander County, NVNV5,872677–

2671Jefferson County, GAGA15,011677–

2672Covington, VAVA5,680676–

2673San Juan County, UTUT14,542675–

2674Greene County, GAGA21,367672–

2675Schley County, GAGA4,593671–

2676Fillmore County, NENE5,458671–

2677Harper County, KSKS5,370669–

2678Mineral County, NVNV4,407665–

2679Valley County, NENE4,094662–

2680Galax, VAVA6,670662–

2681Scott County, KSKS4,815658–

2682Grant County, SDSD7,534657–

2683Castro County, TXTX7,295657–

2684Adams County, IAIA3,617656–

2685Washington County, NCNC10,638655–

2686Spink County, SDSD6,155651–

2687Mercer County, MOMO3,404649–

2688Lincoln County, COCO5,645646–

2689Audubon County, IAIA5,509646–

2690Johnson County, NENE5,218643–

2691Woodson County, KSKS3,118643–

2692Cuming County, NENE8,823642–

2693Fulton County, KYKY6,218640–

2694Mills County, TXTX4,580638–

2695Washington County, COCO4,732638–

2696Calhoun County, ILIL4,300637–

2697Macon County, GAGA11,756635–

2698Washington County, GAGA19,453635–

2699Holt County, MOMO4,200632–

2700Roberts County, SDSD10,255630–

2701Terry County, TXTX11,720628–

2702Noxubee County, MSMS9,798627–

2703Petersburg, VAVA33,734627–

2704Lincoln County, NVNV4,320626–

2705Roosevelt County, MTMT10,242624–

2706Randolph County, GAGA6,156624–

2707Pierce County, NENE7,378624–

2708Lewis County, IDID3,704622–

2709Hansford County, TXTX4,944621–

2710Jenkins County, GAGA8,843620–

2711Putnam County, MOMO4,546619–

2712Tripp County, SDSD5,708618–

2713Polk County, NENE5,270618–

2714Hickman County, KYKY4,372616–

2715Granite County, MTMT3,658616–

2716Big Horn County, MTMT12,752614–

2717McCormick County, SCSC10,215608–

2718Carlisle County, KYKY4,747608–

2719Dickey County, NDND4,895607–

2720Rock County, MNMN9,524606–

2721Hyde County, NCNC4,554604–

2722Brule County, SDSD5,278602–

2723Rosebud County, MTMT8,253601–

2724Schuyler County, MOMO4,140596–

2725Lee County, ARAR8,029595–

2726Big Stone County, MNMN5,054594–

2727Goliad County, TXTX7,208594–

2728Republic County, KSKS4,640593–

2729Bent County, COCO5,716591–

2730Owsley County, KYKY3,932590–

2731Iron County, WIWI6,127589–

2732Ottawa County, KSKS5,744587–

2733Tunica County, MSMS8,819585–

2734Love County, OKOK10,780583–

2735Moody County, SDSD6,632581–

2736Norton, VAVA3,477578–

2737Adams County, IDID5,013577–

2738Alexander County, ILIL4,570577–

2739Cook County, MNMN5,522575–

2740Conejos County, COCO7,529575–

2741Van Buren County, TNTN6,874574–

2742Kimball County, NENE3,391574–

2743McLean County, NDND9,740573–

2744Hardeman County, TXTX3,292573–

2745Millard County, UTUT14,057571–

2746Nance County, NENE3,290571–

2747Sussex County, VAVA10,755569–

2748Bethel Census Area, AKAK18,391568–

2749Lincoln County, MNMN5,583567–

2750Real County, TXTX2,745565–

2751Edwards County, ILIL5,898565–

2752Decatur County, KSKS2,716564–

2753Phillips County, MTMT4,203564–

2754Pendleton County, WVWV5,826564–

2755Treutlen County, GAGA6,466562–

2756Prince of Wales-Hyder Census Area, AKAK5,777560–

2757Holmes County, MSMS15,465560–

2758Clearwater County, MNMN8,647556–

2759Turner County, GAGA8,983555–

2760Mason County, TXTX3,990553–

2761Bon Homme County, SDSD7,244552–

2762Hancock County, TNTN7,075549–

2763Grant County, MNMN6,085548–

2764Clinch County, GAGA6,847548–

2765Assumption Parish, LALA19,720544–

2766Florence County, WIWI4,748544–

2767Barber County, KSKS4,083542–

2768Montgomery County, GAGA8,635540–

2769Stafford County, KSKS4,005539–

2770Wilkin County, MNMN6,288531–

2771Carroll County, MSMS9,226529–

2772Lincoln County, KSKS2,861528–

2773Winkler County, TXTX7,540526–

2774Sumter County, ALAL11,588524–

2775Hand County, SDSD3,121522–

2776Nuckolls County, NENE4,100521–

2777McCulloch County, TXTX7,472520–

2778Hitchcock County, NENE2,467516–

2779Mercer County, NDND8,441515–

2780Phillips County, COCO4,420514–

2781Harper County, OKOK3,172512–

2782Hutchinson County, SDSD7,413512–

2783Morton County, KSKS2,470510–

2784Chautauqua County, KSKS3,321509–

2785Ransom County, NDND5,617507–

2786Webster County, GAGA2,369507–

2787King and Queen County, VAVA6,743506–

2788Yoakum County, TXTX7,438505–

2789Thayer County, NENE4,842503–

2790Dooly County, GAGA11,156503–

2791Day County, SDSD5,484502–

2792Garfield County, UTUT5,256502–

2793Cameron Parish, LALA4,718499–

2794Pickett County, TNTN5,219499–

2795Rush County, KSKS2,845499–

2796Kingsbury County, SDSD5,284498–

2797Osceola County, IAIA5,980496–

2798Perkins County, NENE2,849495–

2799Bottineau County, NDND6,284492–

2800Osborne County, KSKS3,285491–

2801Gregory County, SDSD4,037488–

2802Terrell County, GAGA8,656487–

2803Wilkes County, GAGA9,540487–

2804Macon County, ALAL18,132486–

2805Stanton County, NENE5,744486–

2806Columbia County, WAWA4,141486–

2807Juab County, UTUT13,567483–

2808Traill County, NDND7,920482–

2809Baca County, COCO3,347482–

2810Donley County, TXTX3,213480–

2811Madison Parish, LALA8,844479–

2812Crowley County, COCO5,677479–

2813Sweet Grass County, MTMT3,762477–

2814Trego County, KSKS2,740475–

2815Mountrail County, NDND9,395474–

2816Charles City County, VAVA6,623470–

2817Clark County, KSKS1,900469–

2818Sherman County, KSKS5,763469–

2819Scotland County, MOMO4,796468–

2820Sherman County, NENE2,924468–

2821Lee County, SCSC15,730468–

2822Duval County, TXTX9,402466–

2823Charles Mix County, SDSD9,303466–

2824Baylor County, TXTX3,472466–

2825Buckingham County, VAVA17,137457–

2826Knox County, TXTX3,192455–

2827Union County, NMNM3,844454–

2828St. James Parish, LALA18,938453–

2829Thurston County, NENE6,752452–

2830Chase County, KSKS2,572452–

2831Twiggs County, GAGA7,597451–

2832Surry County, VAVA6,603447–

2833Wilkinson County, GAGA8,650447–

2834Garfield County, WAWA2,416445–

2835Cumberland County, KYKY5,992444–

2836Bamberg County, SCSC12,796443–

2837Hemphill County, TXTX3,083443–

2838Nome Census Area, AKAK9,830441–

2839Pawnee County, NENE2,510441–

2840Coke County, TXTX3,412436–

2841Jewell County, KSKS2,830433–

2842Lac qui Parle County, MNMN6,704431–

2843Niobrara County, WYWY2,341430–

2844Kimble County, TXTX4,438428–

2845Sierra County, CACA3,098427–

2846Blaine County, MTMT6,860427–

2847Petersburg, AKAK3,394425–

2848Briscoe County, TXTX1,474425–

2849Smith County, KSKS3,566425–

2850Pulaski County, ILIL4,820424–

2851Cimarron County, OKOK2,059422–

2852Lynn County, TXTX6,017422–

2853Humphreys County, MSMS7,001418–

2854Cheyenne County, KSKS2,604417–

2855Harlan County, NENE3,000415–

2856Frio County, TXTX18,823415–

2857Greene County, ALAL7,067414–

2858Brown County, NENE2,826414–

2859Wrangell, AKAK2,007411–

2860Armstrong County, TXTX1,843410–

2861Sheridan County, MTMT3,436406–

2862Dolores County, COCO2,466406–

2863Calhoun County, GAGA5,413406–

2864Franklin County, IDID15,889403–

2865Tyrrell County, NCNC3,537402–

2866Upton County, TXTX3,131401–

2867Norman County, MNMN6,336400–

2868Comanche County, KSKS1,673397–

2869Webster County, NENE3,336395–

2870Elk County, KSKS2,458395–

2871Fisher County, TXTX3,692392–

2872Collingsworth County, TXTX2,487390–

2873Kearny County, KSKS3,888388–

2874Morgan County, UTUT13,383386–

2875Haskell County, KSKS3,599385–

2876Garden County, NENE1,804382–

2877Oldham County, TXTX1,783382–

2878Washington County, KSKS5,533382–

2879Lincoln County, GAGA8,112379–

2880Crosby County, TXTX4,852377–

2881Robertson County, KYKY2,325374–

2882Schleicher County, TXTX2,245372–

2883Zapata County, TXTX13,753370–

2884Bath County, VAVA4,076370–

2885McKenzie County, NDND15,192369–

2886Jackson County, SDSD2,666369–

2887Frontier County, NENE2,655368–

2888Wilcox County, ALAL9,666367–

2889Rolette County, NDND11,688366–

2890Haakon County, SDSD1,802366–

2891Hanson County, SDSD3,456366–

2892Garza County, TXTX4,510364–

2893Stanley County, SDSD3,018362–

2894Boyd County, NENE1,674360–

2895Clark County, SDSD4,031359–

2896Catron County, NMNM3,827358–

2897Franklin, VAVA8,478358–

2898Clay County, TNTN7,821355–

2899Shackelford County, TXTX3,197353–

2900Traverse County, MNMN3,130352–

2901Lipscomb County, TXTX2,955351–

2902Hamlin County, SDSD6,900350–

2903Deuel County, SDSD4,408350–

2904Bailey County, TXTX6,963349–

2905Dewey County, SDSD5,419347–

2906Lincoln County, IDID5,603347–

2907Power County, IDID8,246347–

2908Lyman County, SDSD3,694344–

2909Caribou County, IDID7,252344–

2910Edwards County, KSKS2,640344–

2911Echols County, GAGA3,685343–

2912Floyd County, TXTX4,881343–

2913Foster County, NDND3,212338–

2914Cheyenne County, COCO1,713337–

2915Logan County, KSKS2,661336–

2916Haines, AKAK2,068335–

2917Dickens County, TXTX1,692335–

2918Lake of the Woods County, MNMN3,770334–

2919Garfield County, NENE1,710334–

2920Benson County, NDND5,759334–

2921Sargent County, NDND3,711334–

2922Willacy County, TXTX19,971330–

2923Liberty County, MTMT1,957328–

2924Tensas Parish, LALA3,700325–

2925Hall County, TXTX2,737324–

2926Quitman County, GAGA2,254324–

2927Perry County, ALAL7,425323–

2928Gray County, KSKS5,652322–

2929Highland County, VAVA2,318321–

2930Kittson County, MNMN4,031319–

2931Throckmorton County, TXTX1,554318–

2932Judith Basin County, MTMT2,162317–

2933Miller County, GAGA5,812316–

2934Wayne County, UTUT2,587315–

2935Rawlins County, KSKS2,431314–

2936Dillingham Census Area, AKAK4,483312–

2937Bowman County, NDND2,762307–

2938Maverick County, TXTX58,823307–

2939Franklin County, NENE2,795306–

2940Sheridan County, KSKS2,427305–

2941Miner County, SDSD2,281300–

2942Crane County, TXTX4,554300–

2943Skagway, AKAK1,104299–

2944Red Lake County, MNMN3,940299–

2945Starr County, TXTX66,319299–

2946Hidalgo County, NMNM3,929298–

2947Harmon County, OKOK2,327297–

2948Graham County, KSKS2,371297–

2949Hamilton County, KSKS2,500297–

2950Lane County, KSKS1,508296–

2951Stevens County, KSKS4,984295–

2952Deuel County, NENE1,862294–

2953Walworth County, SDSD5,217294–

2954Sioux County, NENE1,188293–

2955Mahnomen County, MNMN5,153292–

2956Aleutians West Census Area, AKAK5,240288–

2957Wells County, NDND3,729288–

2958Wheeler County, OROR1,472288–

2959Sanborn County, SDSD2,388288–

2960Dundy County, NENE1,568287–

2961Renville County, NDND2,331284–

2962Stewart County, GAGA4,631283–

2963Meagher County, MTMT2,137276–

2964Kinney County, TXTX3,128274–

2965Kiowa County, KSKS2,432272–

2966Wahkiakum County, WAWA4,873271–

2967Bullock County, ALAL9,780270–

2968Marshall County, SDSD4,426269–

2969Gilliam County, OROR1,971268–

2970Potter County, SDSD2,377265–

2971Jeff Davis County, TXTX1,711264–

2972Telfair County, GAGA11,195263–

2973Bear Lake County, IDID6,727263–

2974Hodgeman County, KSKS1,619262–

2975Nelson County, NDND2,963261–

2976Perkins County, SDSD2,853260–

2977Lowndes County, ALAL9,359259–

2978Butte County, IDID2,783258–

2979McHenry County, NDND5,130255–

2980Sherman County, TXTX2,781251–

2981Wheatland County, MTMT2,100243–

2982Pierce County, NDND3,838241–

2983Towner County, NDND2,040239–

2984Aurora County, SDSD2,801238–

2985Sherman County, OROR2,051237–

2986Allendale County, SCSC7,355237–

2987La Salle County, TXTX6,517237–

2988Cavalier County, NDND3,497234–

2989Powder River County, MTMT1,781232–

2990Ness County, KSKS2,617231–

2991Harding County, SDSD1,331230–

2992Eddy County, NDND2,329229–

2993Faulk County, SDSD2,178229–

2994Emporia, VAVA5,447226–

2995Greensville County, VAVA11,181225–

2996Denali, AKAK1,616224–

2997Cochran County, TXTX2,546224–

2998Irion County, TXTX1,463223–

2999Worth County, MOMO1,914219–

3000Warren County, GAGA5,269214–

SHOWING 2,501–3,000 OF 3,130

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