Which county has the highest irish share?

Cape May County, New Jersey ranks #1 with 30.1% (2020 Decennial Census).

What are the top 5 counties by irish share?

Cape May County, New Jersey, Plymouth County, Massachusetts, Barnstable County, Massachusetts, Gloucester County, New Jersey, Silver Bow County, Montana.

How many counties are in this ranking?

3,134 counties qualify after filtering for population minimums and data availability. The ranking covers 2020 Decennial Census data.

How is irish share measured?

Share of all residents who are Irish ancestry (Ancestry, ACS detailed tables). Source: US Census Bureau, 2020 Decennial Census.

RANKING · 2020 CENSUS · 134 SHOWN OF 3,134

Highest Irish population share, US counties · 2020

US counties ranked by the share of all residents who are Irish ancestry (2020 American Community Survey). A concentration measure: Irish residents as a percentage of total population.

Irish Americans: full group profile →

All statesAll rankings

SAME RANKING BYCities States Metros

YEAR2010 2020 2024

RANKPLACESTATEPOPIRISH SHAREVS 2010

3001Walthall County, MSMS13,9283.3%−4.4 pts

3002Jefferson County, MSMS6,8253.3%+1.3 pts

3003Lea County, NMNM74,7493.3%−4.4 pts

3004Wilkes County, GAGA9,5403.2%−1.4 pts

3005Pendleton County, WVWV5,8263.2%−4.1 pts

3006Titus County, TXTX31,5633.2%−5.8 pts

3007Decatur County, GAGA29,4323.2%−2.5 pts

3008Jim Wells County, TXTX38,8043.2%−1.3 pts

3009Dougherty County, GAGA82,6163.1%−2.2 pts

3010Sunflower County, MSMS22,8933.1%−0.9 pts

3011Mellette County, SDSD2,1373.1%−5.3 pts

3012Dodge County, GAGA19,6633.1%−0.3 pts

3013Sharkey County, MSMS3,0973.1%0.0 pts

3014Sampson County, NCNC61,5043.1%−2.8 pts

3015Lafourche Parish, LALA95,5053.1%−0.6 pts

3016Cameron Parish, LALA4,7183.1%−3.8 pts

3017Wells County, NDND3,7293.1%−3.6 pts

3018Fairfield County, SCSC20,3403.1%−2.3 pts

3019Nome Census Area, AKAK9,8303.1%−1.7 pts

3020Franklin County, IDID15,8893.1%−0.2 pts

3021Washington County, NCNC10,6383.1%−1.9 pts

3022Oliver County, NDND1,8983.1%−1.1 pts

3023Lee County, ARAR8,0293.1%−2.5 pts

3024Early County, GAGA10,4553.1%−3.1 pts

3025Greene County, ALAL7,0673.1%−1.4 pts

3026Vance County, NCNC42,6383.0%+0.3 pts

3027Ward County, TXTX11,1253.0%−4.5 pts

3028Montgomery County, NCNC26,4033.0%−3.7 pts

3029Washington County, MSMS40,4463.0%−2.7 pts

3030Kemper County, MSMS8,6003.0%−4.7 pts

3031Schley County, GAGA4,5933.0%−11.1 pts

3032Madison Parish, LALA8,8443.0%−0.9 pts

3033St. John the Baptist Parish, LALA39,8752.9%−1.0 pts

3034Lafayette County, FLFL8,7922.9%−8.3 pts

3035Evangeline Parish, LALA31,9802.9%−1.7 pts

3036Kleberg County, TXTX30,3152.9%−2.1 pts

3037Chickasaw County, MSMS16,7302.8%−5.3 pts

3038Aleutians East, AKAK3,4792.8%+1.6 pts

3039St. Martin Parish, LALA51,1062.8%0.0 pts

3040Edgecombe County, NCNC49,1212.7%−1.1 pts

3041Apache County, AZAZ64,4452.7%−1.5 pts

3042Orangeburg County, SCSC83,1772.6%−1.3 pts

3043Glasscock County, TXTX1,1282.6%−5.5 pts

3044Yoakum County, TXTX7,4382.6%−4.0 pts

3045Wheeler County, GAGA7,5702.6%−0.2 pts

3046Prince George's County, MDMD970,3742.6%−1.1 pts

3047Uvalde County, TXTX24,9632.6%−2.5 pts

3048Guadalupe County, NMNM4,3432.6%−1.4 pts

3049Carroll County, MSMS9,2262.6%−2.4 pts

3050Coahoma County, MSMS19,8492.5%−2.2 pts

3051Greenlee County, AZAZ9,3122.5%−8.1 pts

3052Martin County, NCNC21,6012.5%−2.3 pts

3053Buena Vista, VAVA6,6722.5%−9.6 pts

3054Seminole County, GAGA9,1622.5%−10.1 pts

3055Jasper County, MSMS15,7852.5%−4.5 pts

3056Rich County, UTUT2,6872.5%−3.3 pts

3057Franklin, VAVA8,4782.5%−1.7 pts

3058Sutton County, TXTX3,2032.5%−1.8 pts

3059North Slope, AKAK10,5822.5%+0.4 pts

3060Webster County, GAGA2,3692.4%−16.2 pts

3061Dewey County, SDSD5,4192.4%−4.1 pts

3062Williamsburg County, SCSC29,6622.4%+0.3 pts

3063El Paso County, TXTX877,8582.4%−0.1 pts

3064Bladen County, NCNC30,0072.3%−2.3 pts

3065Marion County, SCSC28,2422.3%−2.9 pts

3066Perry County, ALAL7,4252.3%−0.7 pts

3067Lee County, SCSC15,7302.3%−0.1 pts

3068Bailey County, TXTX6,9632.3%−2.7 pts

3069Dallas County, ALAL35,1402.3%−2.8 pts

3070Sioux County, NDND3,6672.3%+0.6 pts

3071Dimmit County, TXTX8,0242.3%+0.4 pts

3072Santa Cruz County, AZAZ50,0202.2%−1.2 pts

3073Northwest Arctic, AKAK7,0952.2%−0.2 pts

3074Pecos County, TXTX14,5602.2%−2.7 pts

3075San Miguel County, NMNM26,2602.2%−1.6 pts

3076Warren County, GAGA5,2692.2%−1.4 pts

3077Dooly County, GAGA11,1562.1%−1.4 pts

3078Calhoun County, GAGA5,4132.1%−4.1 pts

3079Stewart County, GAGA4,6312.0%−2.9 pts

3080McIntosh County, NDND2,4512.0%−0.9 pts

3081Duval County, TXTX9,4022.0%−1.9 pts

3082Assumption Parish, LALA19,7202.0%−0.4 pts

3083Hudspeth County, TXTX3,4331.9%+0.2 pts

3084Zavala County, TXTX9,0371.9%+1.4 pts

3085Hampton County, SCSC18,1741.9%−4.5 pts

3086Clayton County, GAGA297,4711.9%−0.7 pts

3087Val Verde County, TXTX47,8351.9%−1.3 pts

3088Robeson County, NCNC119,9411.8%−1.0 pts

3089Randolph County, GAGA6,1561.8%−6.2 pts

3090Scotland County, NCNC33,3221.8%−2.9 pts

3091Bronx County, NYNY1,406,3321.8%−1.0 pts

3092Petersburg, VAVA33,7341.8%−0.2 pts

3093Imperial County, CACA181,4111.8%−0.9 pts

3094Barnwell County, SCSC20,6531.7%−3.0 pts

3095Allendale County, SCSC7,3551.7%−0.5 pts

3096Schleicher County, TXTX2,2451.7%−9.4 pts

3097St. Landry Parish, LALA80,7651.7%−1.6 pts

3098Issaquena County, MSMS1,2631.6%−4.3 pts

3099Stanton County, KSKS1,9861.6%−6.5 pts

3100Telfair County, GAGA11,1951.6%0.0 pts

3101Lowndes County, ALAL9,3591.5%−0.7 pts

3102Jim Hogg County, TXTX4,5551.5%+0.8 pts

3103Willacy County, TXTX19,9711.5%0.0 pts

3104Wilcox County, ALAL9,6661.5%−1.5 pts

3105Rolette County, NDND11,6881.5%−1.1 pts

3106Baker County, GAGA2,7251.3%+0.9 pts

3107Bethel Census Area, AKAK18,3911.3%−2.1 pts

3108Leflore County, MSMS25,6861.3%−1.7 pts

3109Miami-Dade County, FLFL2,802,0291.3%−0.6 pts

3110Twiggs County, GAGA7,5971.2%−3.6 pts

3111McKinley County, NMNM68,1191.2%−0.4 pts

3112Reagan County, TXTX3,1661.2%−3.7 pts

3113Todd County, SDSD8,8631.2%−0.5 pts

3114Rio Arriba County, NMNM39,8321.2%−1.5 pts

3115St. James Parish, LALA18,9381.1%−1.0 pts

3116Bullock County, ALAL9,7801.1%−1.4 pts

3117Cameron County, TXTX433,9461.1%−0.7 pts

3118Reeves County, TXTX12,1381.0%+0.1 pts

3119Hidalgo County, TXTX921,5491.0%−0.5 pts

3120Zapata County, TXTX13,7530.9%−1.8 pts

3121Oglala Lakota County, SDSD13,3380.9%–

3122Bamberg County, SCSC12,7960.9%−1.9 pts

3123Holmes County, MSMS15,4650.8%−2.1 pts

3124Buffalo County, SDSD1,8020.7%−0.4 pts

3125Menominee County, WIWI4,1990.7%−1.7 pts

3126Emporia, VAVA5,4470.6%−3.3 pts

3127Claiborne County, MSMS8,0580.5%−0.9 pts

3128Kenedy County, TXTX3190.5%–

3129Webb County, TXTX281,2240.5%−0.3 pts

3130Maverick County, TXTX58,8230.3%−0.3 pts

3131Starr County, TXTX66,3190.3%−0.2 pts

3132Kalawao County, HIHI820.2%−5.2 pts

3133Kusilvak Census Area, AKAK7,9320.2%–

3134Brooks County, TXTX6,5790.2%−0.5 pts

SHOWING 3,001–3,134 OF 3,134

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Download CSV (full list, 3,134 rows)

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