How the top 25 counties with Irish ancestry voted in 2016 and 2020

Red dots show counties that voted for Donald Trump in the 2016 and 2020 presidential races. Blue shows counties that voted for Hillary Clinton (2016) and Joe Biden (2020). Purple shows counties that voted Republican in 2016 but voted Democrat in 2020.

Irish ancestry data has been sourced from the US Census Bureau (US Census 2022: ACS 5-Year Estimates Data Profiles). Election results data has been sourced from each county's government website where available and from national news outlets where not available. Votes for non-Democrat and Republican candidates have not been included in the above results.
Chart: Nora-Íde McAuliffe Source: US Census Bureau - AncestryGet the dataCreated with Datawrapper