List of the most populous counties by U.S. state

The following is a sortable table of the most populous county in each U.S. state and territory. Counties in bold have a population of at least 1 million.

Table

State	Largest county/parish/municipality	Population (2012 estimate)
Alabama	Jefferson	660,009
Alaska	Anchorage	298,610
Arizona	Maricopa	3,942,169
Arkansas	Pulaski	388,953
California	Los Angeles	9,962,789
Colorado	El Paso	644,964
Connecticut	Fairfield	933,835
Delaware	New Castle	546,076
Florida	Miami-Dade	2,591,035
Georgia	Fulton	977,773
Hawaii	Honolulu	976,372
Idaho	Ada	409,061
Illinois	Cook	5,231,351
Indiana	Marion	918,977
Iowa	Polk	443,710
Kansas	Johnson	559,913
Kentucky	Jefferson	750,828
Louisiana	East Baton Rouge	444,526
Maine	Cumberland	283,921
Maryland	Montgomery	1,004,709
Massachusetts	Middlesex	1,537,251
Michigan	Wayne	1,792,365
Minnesota	Hennepin	1,184,576
Mississippi	Hinds	248,643
Missouri	St. Louis County	1,000,438
Montana	Yellowstone	151,882
Nebraska	Douglas	531,265
Nevada	Clark	2,000,759
New Hampshire	Hillsborough	402,922
New Jersey	Bergen	918,888
New Mexico	Bernalillo	673,460
New York	Kings	2,565,635
North Carolina	Mecklenburg	969,031
North Dakota	Cass	156,157
Ohio	Cuyahoga	1,265,111
Oklahoma	Oklahoma	741,781
Oregon	Multnomah	759,256
Pennsylvania	Philadelphia	1,547,607
Rhode Island	Providence	628,323
South Carolina	Greenville	467,605
South Dakota	Minnehaha	175,037
Tennessee	Shelby	940,764
Texas	Harris	4,253,700
Utah	Salt Lake	1,063,842
Vermont	Chittenden	158,504
Virginia	Fairfax	1,118,602
Washington	King	2,007,440
West Virginia	Kanawha	192,179
Wisconsin	Milwaukee	955,205
Wyoming	Laramie	94,483