Although most U.S. counties were created during the 19th century, the most recent county in the United States is Broomfield County in Colorado, created in 2001.
The population is based on a 2004 estimate. From the 2000 Census to the year 2004, all counties remained the same in ranking, while Dallas County overtook Queens County to rank ninth.
| |
Smallest
|
Largest
|
| All States |
Kalawao County, Hawaii (13) |
North Slope Borough, Alaska (94,763) |
| Alabama |
Etowah County, Alabama (535) |
Baldwin County, Alabama (1,596) |
| Alaska |
Bristol Bay Borough, Alaska (505) |
North Slope Borough, Alaska (94,763) |
| Arizona |
Santa Cruz County, Arizona (1,238) |
Coconino County, Arizona (18,617) |
| Arkansas |
Lafayette County, Arkansas (527) |
Union County, Arkansas (1,039) |
| California |
San Francisco, California (47) |
San Bernardino County, California (20,062) |
| Colorado |
Broomfield County, Colorado (27) |
Las Animas County, Colorado (4,772) |
| Connecticut |
Middlesex County, Connecticut (369) |
Litchfield County, Connecticut (920) |
| Delaware |
New Castle County, Delaware (426) |
Sussex County, Delaware (938) |
| Florida |
Union County, Florida (240) |
Collier County, Florida (2,025) |
| Georgia |
Clarke County, Georgia (121) |
Ware County, Georgia (903) |
| Hawaii |
Kalawao County, Hawaii (13) |
Hawaii County, Hawaii (4,028) |
| Idaho |
Payette County, Idaho (408) |
Idaho County, Idaho (8,485) |
| Illinois |
Putnam County, Illinois (160) |
McLean County, Illinois (1,184) |
| Indiana |
Ohio County, Indiana (87) |
Allen County, Indiana (657) |
| Iowa |
Dickinson County, Iowa (381) |
Kossuth County, Iowa (973) |
| Kansas |
Wyandotte County, Kansas (151) |
Butler County, Kansas (1,428) |
| Kentucky |
Robertson County, Kentucky (100) |
Pike County, Kentucky (788) |
| Louisiana |
Orleans Parish, Louisiana (181) |
Rapides Parish, Louisiana (1,323) |
| Maine |
Sagadahoc County, Maine (254) |
Aroostook County, Maine (6,672) |
| Maryland |
Calvert County, Maryland (215) |
Frederick County, Maryland (663) |
| Massachusetts |
Nantucket County, Massachusetts (48) |
Worcester County, Massachusetts (1,513) |
| Michigan |
Benzie County, Michigan (321) |
Marquette County, Michigan (1,821) |
| Minnesota |
Ramsey County, Minnesota (156) |
St. Louis County, Minnesota (6,225) |
| Mississippi |
Alcorn County, Mississippi (400) |
Yazoo County, Mississippi (919) |
| Missouri |
Worth County, Missouri (267) |
Texas County, Missouri (1,179) |
| Montana |
Silver Bow County, Montana (718) |
Beaverhead County, Montana (5,542) |
| Nebraska |
Sarpy County, Nebraska (241) |
Cherry County, Nebraska (5,961) |
| Nevada |
Storey County, Nevada (264) |
Nye County, Nevada (18,147) |
| New Hampshire |
Strafford County, New Hampshire (369) |
Coos County, New Hampshire (1,801) |
| New Jersey |
Hudson County, New Jersey (47) |
Burlington County, New Jersey (805) |
| New Mexico |
Los Alamos County, New Mexico (109) |
Catron County, New Mexico (6,928) |
| New York |
New York County, New York (23) |
St. Lawrence County, New York (2,686) |
| North Carolina |
Chowan County, North Carolina (173) |
Robeson County, North Carolina (949) |
| North Dakota |
Eddy County, North Dakota (630) |
McKenzie County, North Dakota (2,742) |
| Ohio |
Lake County, Ohio (229) |
Ashtabula County, Ohio (703) |
| Oklahoma |
Marshall County, Oklahoma (371) |
Osage County, Oklahoma (2,251) |
| Oregon |
Multnomah County, Oregon (435) |
Harney County, Oregon (10,134) |
| Pennsylvania |
Montour County, Pennsylvania (131) |
Lycoming County, Pennsylvania (1,235) |
| Rhode Island |
Bristol County, Rhode Island (25) |
Providence County, Rhode Island (413) |
| South Carolina |
McCormick County, South Carolina (360) |
Horry County, South Carolina (1,134) |
| South Dakota |
Clay County, South Dakota (412) |
Meade County, South Dakota (3,471) |
| Tennessee |
Trousdale County, Tennessee (114) |
Shelby County, Tennessee (755) |
| Texas |
Rockwall County, Texas (129) |
Brewster County, Texas (6,193) |
| Utah |
Davis County, Utah (305) |
San Juan County, Utah (7,821) |
| Vermont |
Grand Isle County, Vermont (83) |
Windsor County, Vermont (972) |
| Virginia |
Arlington County, Virginia (26) |
Pittsylvania County, Virginia (978) |
| Washington |
San Juan County, Washington (175) |
Okanogan County, Washington (5,268) |
| West Virginia |
Hancock County, West Virginia (83) |
Randolph County, West Virginia (1,040) |
| Wisconsin |
Ozaukee County, Wisconsin (232) |
Marathon County, Wisconsin (1,545) |
| Wyoming |
Hot Springs County, Wyoming (2,004) |
Sweetwater County, Wyoming (10,426) |
| |
Smallest
|
Largest
|
| All States |
Loving County, Texas (67) |
Los Angeles County, California (9,519,338) |
| Alabama |
Greene County, Alabama (9,974) |
Jefferson County, Alabama (662,047) |
| Alaska |
Yakutat City and Borough, Alaska (808) |
Municipality of Anchorage, Alaska (260,283) |
| Arizona |
Greenlee County, Arizona (8,547) |
Maricopa County, Arizona (3,072,149) |
| Arkansas |
Calhoun County, Arkansas (5,744) |
Pulaski County, Arkansas (361,474) |
| California |
Alpine County, California (1,208) |
Los Angeles County, California (9,519,338) |
| Colorado |
San Juan County, Colorado (558) |
Denver County, Colorado (554,636) |
| Connecticut |
Windham County, Connecticut (109,091) |
Fairfield County, Connecticut (882,567) |
| Delaware |
Kent County, Delaware (126,697) |
New Castle County, Delaware (500,265) |
| District of Columbia |
District of Columbia (572,059)
|
| Florida |
Liberty County, Florida (7,021) |
Miami-Dade County, Florida (2,253,362) |
| Georgia |
Taliaferro County, Georgia (2,077) |
Fulton County, Georgia (816,006) |
| Hawaii |
Kalawao County, Hawaii (147) |
City & County of Honolulu (876,156) |
| Idaho |
Camas County, Idaho (991) |
Ada County, Idaho (300,904) |
| Illinois |
Pope County, Illinois (4,413) |
Cook County, Illinois (5,376,741) |
| Indiana |
Ohio County, Indiana (5,623) |
Marion County, Indiana (860,454) |
| Iowa |
Adams County, Iowa (4,482) |
Polk County, Iowa (374,601) |
| Kansas |
Greeley County, Kansas (1,534) |
Johnson County, Kansas (451,086) |
| Kentucky |
Robertson County, Kentucky (2,266) |
Jefferson County, Kentucky (693,604) |
| Louisiana |
Tensas Parish, Louisiana (6,618) |
Orleans Parish, Louisiana (484,674) |
| Maine |
Piscataquis County, Maine (17,235) |
Cumberland County, Maine (265,612) |
| Maryland |
Kent County, Maryland (19,197) |
Montgomery County, Maryland (873,341) |
| Massachusetts |
Nantucket County, Massachusetts (9,520) |
Middlesex County, Massachusetts (1,465,396) |
| Michigan |
Keweenaw County, Michigan (2,301) |
Wayne County, Michigan (2,061,162) |
| Minnesota |
Traverse County, Minnesota (4,134) |
Hennepin County, Minnesota (1,116,200) |
| Mississippi |
Issaquena County, Mississippi (2,274) |
Hinds County, Mississippi (250,800) |
| Missouri |
Worth County, Missouri (2,382) |
St. Louis County, Missouri (1,016,315) |
| Montana |
Petroleum County, Montana (493) |
Yellowstone County, Montana (129,352) |
| Nebraska |
Arthur County, Nebraska (444) |
Douglas County, Nebraska (463,585) |
| Nevada |
Esmeralda County, Nevada (971) |
Clark County, Nevada (1,375,765) |
| New Hampshire |
Coos County, New Hampshire (33,111) |
Hillsborough County, New Hampshire (380,841) |
| New Jersey |
Salem County, New Jersey (65,285) |
Bergen County, New Jersey (884,118) |
| New Mexico |
Harding County, New Mexico (810) |
Bernalillo County, New Mexico (556,678) |
| New York |
Hamilton County, New York (5,379) |
Kings County, New York (2,465,326) |
| North Carolina |
Tyrrell County, North Carolina (4,149) |
Mecklenburg County, North Carolina (695,454) |
| North Dakota |
Slope County, North Dakota (767) |
Cass County, North Dakota (123,138) |
| Ohio |
Vinton County, Ohio (12,806) |
Cuyahoga County, Ohio (1,393,978) |
| Oklahoma |
Cimarron County, Oklahoma (3,148) |
Oklahoma County, Oklahoma (660,448) |
| Oregon |
Wheeler County, Oregon (1,547) |
Multnomah County, Oregon (660,486) |
| Pennsylvania |
Forest County, Pennsylvania (4,946) |
Philadelphia County, Pennsylvania (1,517,550) |
| Rhode Island |
Bristol County, Rhode Island (50,648) |
Providence County, Rhode Island (621,602) |
| South Carolina |
McCormick County, South Carolina (9,958) |
Greenville County, South Carolina (379,616) |
| South Dakota |
Jones County, South Dakota (1,193) |
Minnehaha County, South Dakota (148,281) |
| Tennessee |
Pickett County, Tennessee (4,945) |
Shelby County, Tennessee (897,472) |
| Texas |
Loving County, Texas (67) |
Harris County, Texas (3,400,578) |
| Utah |
Daggett County, Utah (921) |
Salt Lake County, Utah (898,387) |
| Vermont |
Essex County, Vermont (6,459) |
Chittenden County, Vermont (146,571) |
| Virginia |
Highland County, Virginia (2,536) |
Fairfax County, Virginia (969,749) |
| Washington |
Garfield County, Washington (2,397) |
King County, Washington (1,737,034) |
| West Virginia |
Wirt County, West Virginia (5,873) |
Kanawha County, West Virginia (200,073) |
| Wisconsin |
Menominee County, Wisconsin (4,562) |
Milwaukee County, Wisconsin (940,164) |
| Wyoming |
Niobrara County, Wyoming (2,407) |
Laramie County, Wyoming (81,607) |
