US Census Bureau · ACS 2023

    US Counties by Population

    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 #1–25
    #CountyStatePopulation
    1Los Angeles CountyCalifornia9,848,406
    2Cook CountyIllinois5,185,812
    3Harris CountyTexas4,758,579
    4Maricopa CountyArizona4,491,987
    5San Diego CountyCalifornia3,282,782
    6Orange CountyCalifornia3,164,063
    7Miami-Dade CountyFlorida2,685,296
    8Kings CountyNew York2,646,306
    9Dallas CountyTexas2,603,816
    10Riverside CountyCalifornia2,449,909
    11Queens CountyNew York2,330,124
    12Clark CountyNevada2,293,764
    13King CountyWashington2,262,713
    14San Bernardino CountyCalifornia2,187,816
    15Tarrant CountyTexas2,135,743
    16Bexar CountyTexas2,037,344
    17Broward CountyFlorida1,946,127
    18Santa Clara CountyCalifornia1,903,297
    19Wayne CountyMichigan1,773,767
    20Alameda CountyCalifornia1,651,949
    21New York CountyNew York1,627,788
    22Middlesex CountyMassachusetts1,622,896
    23Sacramento CountyCalifornia1,584,047
    24Philadelphia CountyPennsylvania1,582,432
    25Suffolk CountyNew York1,525,680
    12…129
    Next →

    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