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 · 130 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 –

3001Hyde County, SDSD1,191212–

3002Wallace County, KSKS1,441210–

3003Yukon-Koyukuk Census Area, AKAK5,028208–

3004LaMoure County, NDND4,135208–

3005East Carroll Parish, LALA6,760208–

3006Gove County, KSKS2,631208–

3007Garfield County, MTMT1,148207–

3008Mora County, NMNM4,051207–

3009Jackson County, COCO1,211206–

3010McCone County, MTMT1,720205–

3011Rock County, NENE1,259205–

3012Wheeler County, GAGA7,570199–

3013Costilla County, COCO3,679199–

3014Dunn County, NDND4,058198–

3015Foard County, TXTX1,044198–

3016Eureka County, NVNV1,867197–

3017Sedgwick County, COCO2,247196–

3018Sully County, SDSD1,479194–

3019Ziebach County, SDSD2,389189–

3020Guadalupe County, NMNM4,343188–

3021Adams County, NDND2,275188–

3022Dimmit County, TXTX8,024187–

3023North Slope, AKAK10,582186–

3024Oneida County, IDID5,085184–

3025Glascock County, GAGA3,141183–

3026Hoonah-Angoon Census Area, AKAK2,271182–

3027Northwest Arctic, AKAK7,095180–

3028Sutton County, TXTX3,203180–

3029Stanton County, KSKS1,986178–

3030Gosper County, NENE1,803178–

3031Divide County, NDND2,110175–

3032McPherson County, NENE369174–

3033Motley County, TXTX1,043172–

3034Alpine County, CACA1,043171–

3035Jones County, SDSD913171–

3036Mellette County, SDSD2,137171–

3037Douglas County, SDSD2,888168–

3038Corson County, SDSD3,781164–

3039Todd County, SDSD8,863164–

3040Hayes County, NENE821161–

3041Carter County, MTMT1,383159–

3042Cottle County, TXTX1,224159–

3043Reagan County, TXTX3,166159–

3044Emmons County, NDND3,215158–

3045Grant County, NENE561157–

3046Jefferson County, MSMS6,825154–

3047Piute County, UTUT1,509153–

3048Hancock County, GAGA8,682150–

3049Golden Valley County, MTMT844149–

3050Sharkey County, MSMS3,097148–

3051Kiowa County, COCO1,412147–

3052Grant County, NDND2,206146–

3053Edmunds County, SDSD4,022146–

3054Claiborne County, MSMS8,058143–

3055Wibaux County, MTMT885143–

3056Greeley County, KSKS1,182142–

3057Loup County, NENE570141–

3058McMullen County, TXTX544140–

3059Jerauld County, SDSD1,654139–

3060Stonewall County, TXTX1,186139–

3061Daniels County, MTMT1,612137–

3062Roberts County, TXTX867136–

3063Hettinger County, NDND2,492135–

3064Clay County, GAGA2,815133–

3065Presidio County, TXTX5,433132–

3066De Baca County, NMNM1,647131–

3067Terrell County, TXTX702131–

3068Prairie County, MTMT1,112128–

3069Mineral County, COCO910128–

3070Wichita County, KSKS2,031128–

3071Rich County, UTUT2,687127–

3072Sterling County, TXTX1,349125–

3073Hooker County, NENE686123–

3074Thomas County, NENE639123–

3075Esmeralda County, NVNV729123–

3076Golden Valley County, NDND1,808122–

3077Kidder County, NDND2,393120–

3078Wheeler County, NENE789119–

3079Edwards County, TXTX1,370119–

3080Griggs County, NDND2,239116–

3081Reeves County, TXTX12,138115–

3082Issaquena County, MSMS1,263112–

3083Campbell County, SDSD1,377112–

3084Menard County, TXTX1,956111–

3085McPherson County, SDSD2,347110–

3086Borden County, TXTX567109–

3087Steele County, NDND1,797107–

3088Crockett County, TXTX2,769107–

3089Glasscock County, TXTX1,128107–

3090Camas County, IDID1,316107–

3091Culberson County, TXTX2,267105–

3092Menominee County, WIWI4,199101–

3093Keweenaw County, MIMI2,18698–

3094Burke County, NDND2,13293–

3095Keya Paha County, NENE79292–

3096Concho County, TXTX3,60792–

3097Logan County, NDND1,85991–

3098Logan County, NENE66984–

3099Treasure County, MTMT72884–

3100Billings County, NDND1,07183–

3101McIntosh County, NDND2,45183–

3102Banner County, NENE68682–

3103Daggett County, UTUT93482–

3104Yakutat, AKAK67281–

3105Blaine County, NENE45880–

3106Petroleum County, MTMT54879–

3107Kent County, TXTX67478–

3108Arthur County, NENE39677–

3109Bristol Bay, AKAK84776–

3110Oliver County, NDND1,89876–

3111San Juan County, COCO81376–

3112Bennett County, SDSD3,30771–

3113Taliaferro County, GAGA1,66269–

3114Sioux County, NDND3,66767–

3115Zavala County, TXTX9,03765–

3116Hinsdale County, COCO75364–

3117Hudspeth County, TXTX3,43359–

3118Sheridan County, NDND1,29658–

3119Slope County, NDND62857–

3120Brooks County, TXTX6,57952–

3121Aleutians East, AKAK3,47944–

3122Jim Hogg County, TXTX4,55541–

3123Harding County, NMNM61738–

3124Lake and Peninsula, AKAK1,35734–

3125King County, TXTX19232–

3126Buffalo County, SDSD1,80221–

3127Clark County, IDID78320–

3128Baker County, GAGA2,72516–

3129Loving County, TXTX5213–

3130Kalawao County, HIHI824–

SHOWING 3,001–3,130 OF 3,130

1 2 3 4 5 6 7

Download CSV (full list, 3,130 rows)

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