US Census Bureau · ACS 2023

    US Counties by Population— Page 5

    Every US county ranked by total population, from largest to smallest, based on the Census Bureau ACS 5-Year Estimates.

    3,222 counties rankedSource: US Census Bureau ACS 2023Highest firstShowing #101–125
    #CountyStatePopulation
    101Jefferson CountyAlabama669,744
    102Providence CountyRhode Island658,977
    103Kent CountyMichigan658,844
    104Arapahoe CountyColorado655,709
    105Montgomery CountyTexas654,722
    106Ocean CountyNew Jersey646,434
    107Bucks CountyPennsylvania645,993
    108Williamson CountyTexas643,889
    109Monmouth CountyNew Jersey643,615
    110Western Connecticut Planning RegionConnecticut621,232
    111Brevard CountyFlorida620,533
    112Johnson CountyKansas614,764
    113Washington CountyOregon600,266
    114Anne Arundel CountyMaryland590,936
    115Pasco CountyFlorida588,758
    116Douglas CountyNebraska585,461
    117Jefferson CountyColorado579,715
    118Bristol CountyMassachusetts578,436
    119Baltimore cityMaryland577,193
    120Delaware CountyPennsylvania576,195
    121New Castle CountyDelaware573,030
    122Union CountyNew Jersey572,549
    123Volusia CountyFlorida568,229
    124South Central Connecticut Planning RegionConnecticut566,803
    125Dane CountyWisconsin564,777
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    Data from the US Census Bureau American Community Survey (ACS) 5-Year Estimates, 2019–2023. Rankings include all counties, county equivalents, and independent cities in the United States. Click any county to see its full profile.

    Other Rankings

    US Counties by Median Home ValueMost Affordable Counties in the US by Home ValueUS Counties by Median Household IncomeUS Counties with the Lowest Poverty RatesUS Counties with the Highest Poverty RatesLeast Rent-Burdened Counties in the US