New Counties or County Equivalent Entities

• Aleutians East Borough, Alaska (02-013):
  Created from part of the former Aleutian Islands Census Area (02-010) effective October 23, 1987. The remainder of the former Aleutian Islands Census Area was established as the new Aleutians West Census Area (02-016); 1980 population: 1,643.
• Aleutians West Census Area, Alaska (02-016):
  Created from the remainder of the former Aleutian Islands Census Area (02-010) when the new Aleutians East Borough (02-013) was created effective October 23, 1987; 1980 population: 6,125.
• Lake and Peninsula Borough, Alaska (02-164):
  Created from part of the Dillingham Census Area (02-070) effective April 24, 1989; 1980 population: 1,384.
• Northwest Arctic Borough, Alaska (02-188):
  Created from all of the former Kobuk Census Area (02-140) and an unpopulated part of the North Slope Borough (02-185) effective June 2, 1986; 1980 population: 4,831.
• La Paz County, Arizona (04-012):
  Created from part of Yuma County (04-027) effective January 1, 1983; 1980 population: 12,557.
• Cibola County, New Mexico (35-006):
  Created from part of Valencia County (35-061) effective June 19, 1981; 1980 population: 30,347.

Deleted Counties or County Equivalent Entities

• Aleutian Islands Census Area, Alaska (02-010):
  Split to create the Aleutians East Borough (02-013) and the Aleutians West Census Area (02-016) effective October 23, 1987.
• Kobuk Census Area (02-140):
  All taken plus unpopulated part of the North Slope Borough (02-185) to create the new Northwest Arctic Borough (02-188) effective June 2, 1986.

Name and/or Code Changes or Corrections for Counties or County Equivalent Entities

• DeKalb County, Alabama (01-049):
  Name corrected from De Kalb County.
• DeSoto County, Florida (12-027):
  Name corrected from De Soto County.
• DeKalb County, Georgia (13-089):
  Name corrected from De Kalb County.
• DeKalb County, Illinois (17-037):
  Name corrected from De Kalb County.
• DuPage County, Illinois (17-043):
  Name corrected from Du Page County.
• DeSoto County, Mississippi (28-033):
  Name corrected from De Soto County.
• DeKalb County, Missouri (29-063):
  Name corrected from De Kalb County.
• LaMoure County, North Dakota (38-045):
  Name corrected from La Moure County.
• DeKalb County, Tennessee (47-041):
  Name corrected from De Kalb County.
• DeWitt County, Texas (48-123):
  Name corrected from De Witt County.

Substantial County or County Equivalent Entity Boundary Changes

• Dillingham Census Area (02-070):
  Part taken to create the new Lake and Peninsula Borough (02-164) effective April 24, 1989; 1980 detached population: 1,384.
• North Slope Borough (02-185):
  Unpopulated part plus all of the former Kobuk Census Area (02-140) taken to create the new Northwest Arctic Borough (02-188) effective June 2, 1986.
• Yuma County, Arizona (04-027):
  Part taken to create new La Paz County (04-012) effective January 1, 1983; 1980 detached population: 12,557.
• Adams County, Colorado (08-001):
  Annexed part of Denver County (08-031) coextensive with Denver city effective October 18, 1980; estimated population: 2,500. Part annexed to Denver County (08-031) effective May 17, 1988; estimated area 43.31 square miles with no estimated population.
• Denver County, Colorado (08-031) coextensive with Denver city:
  Part annexed to Adams County (08-001) effective October 18, 1980; estimated population: 2,500. Annexed part of Adams County (08-001) effective May 17, 1988; estimated area 43.31 square miles with no estimated population. Part annexed to Arapahoe County (08-005) effective July 28, 1980; estimated area one square mile with no estimated population.
• Arapahoe County, Colorado (08-005):
  Annexed part of Denver County (08-031) coextensive with Denver city effective July 28, 1980; estimated area one square mile with no estimated population.
• Valencia County, New Mexico (35-061):
  Part taken to create new Cibola County (35-006) effective June 19, 1981; 1980 detached population: 30,347.
• Albemarle County, Virginia (51-003):
  Part annexed to Charlottesville (independent) city (51-540) effective February 9, 1988; no estimated population available.
• Augusta County, Virginia (51-015):
  Part annexed to Staunton (independent) city (51-790) effective December 31, 1986; estimated population: 2,300. Part annexed to Waynesboro (independent) city (51-820) effective December 31, 1985; estimated population 3,000.
• Fairfax County, Virginia (51-059):
  Part annexed to Fairfax (independent) city (51-600) effective December 31, 1980; estimated population: 1,100.
• Greensville County, Virginia (51-081):
  Part annexed to Emporia (independent) city (51-595) effective January 1, 1988; estimated population: 400.
• James City County, Virginia (51-095):
  Part annexed to Williamsburg (independent) city (51-830) effective January 1, 1983; estimated population: 400.
• Pittsylvania County, Virginia (51-143):
  Part annexed to Danville (independent) city (51-590) effective December 31, 1987 and December 31, 1988; estimated population: 10,500.
• Prince William County, Virginia (51-153):
  Part annexed to Manassas (independent) city (51-683) effective December 31, 1983; estimated population: 300.
• Rockbridge County, Virginia (51-163):
  Part annexed to Buena Vista (independent) city (51-530) effective December 31, 1983; estimated population: 200.
• Rockingham County, Virginia (51-165):
  Part annexed to Harrisonburg (independent) city (51-660) effective December 31, 1982; estimated population: 5,500.
• Southampton County, Virginia (51-175):
  Part annexed to Franklin (independent) city (51-620) effective December 31, 1985; estimated population: 600.
• Spotsylvania County, Virginia (51-177):
  Part annexed to Fredericksburg (independent) city (51-630) effective December 31, 1983; estimated population: 2,800.
• Buena Vista (independent) city, Virginia (51-530):
  Annexed part of Rockbridge County (51-163) effective December 31, 1983; estimated population: 200.
• Charlottesville (independent) city, Virginia (51-540):
  Annexed part of Albemarle County (51-003) effective February 9, 1988; no estimated population available.
• Danville (independent) city, Virginia (51-590):
  Annexed part of Pittsylvania County (51-143) effective December 31, 1987 and December 31, 1988; estimated population: 10,500.
• Emporia (independent) city, Virginia (51-595):
  Annexed part of Greensville County (51-081) effective January 1, 1988; estimated population: 400.
• Fairfax (independent) city, Virginia (51-600):
  Annexed part of Fairfax County (51-059) effective December 31, 1980; estimated population: 1,100.
• Franklin (independent) city, Virginia (51-620):
  Annexed part of Southampton County (51-175) effective December 31, 1985; estimated population: 600.
• Fredericksburg (independent) city, Virginia (51-630):
  Annexed part of Spotsylvania County (51-177) effective December 31, 1983; estimated population: 2,800.
• Harrisonburg (independent) city, Virginia (51-660):
  Annexed part of Rockingham County (51-165) effective December 31, 1982; estimated population: 5,500.
• Manassas (independent) city, Virginia (51-683):
  Annexed part of Prince William County (51-153) effective December 31, 1983; estimated population: 300.
• Staunton (independent) city, Virginia (51-790):
  Annexed part of Augusta County (51-015) effective December 31, 1986; estimated population: 2,300.
• Waynesboro (independent) city, Virginia (51-820):
  Annexed part of Augusta County (51-015) effective December 31, 1985; estimated population: 3,000.
• Williamsburg (independent) city, Virginia (51-830):
  Annexed part of James City County (51-095) effective December 31, 1983; estimated population: 400.