Largest Czech population, New Jersey counties

New Jersey counties ranked by the number of residents who are Czech ancestry, from the 2024 American Community Survey detailed-origin tables. Each list covers the full eligible universe; download the complete data as CSV. This list covers the 21 counties in New Jersey that qualify, ranked against each other statewide. The median across all 21 is 904. Biggest climber in the top 100 since 2020: Gloucester County, NJ, up 5 places to #11.