New Counties or County Equivalent Entities

• Denali Borough, Alaska (02-068):
  Created from part of the Yukon-Koyukuk Census Area (02-290) and an unpopulated part of the Southeast Fairbanks Census Area (02-240) effective December 7, 1990; 1990 population: 1,682.
• Skagway-Hoonah-Angoon Census Area, Alaska (02-232):
  Created from the remainder of the former Skagway-Yakutat-Angoon Census Area (02-231) when the new Yakutat City and Borough (02-282) was created effective September 22, 1992; 1990 population: 3,679.
• Yakutat City and Borough, Alaska (02-282):
  Created from part of the former Skagway-Yakutat-Angoon Census Area (02-231) effective September 22, 1992. The remainder of the former Skagway-Yakutat-Angoon Census Area was established as the new Skagway-Hoonah-Angoon Census Area (02-232) effective September 22, 1992; 1990 population: 725.

Deleted Counties or County Equivalent Entities

• Skagway-Yakutat-Angoon Census Area, Alaska (02-231):
  Split to create the Skagway-Hoonah-Angoon Census Area (02-232) and Yakutat City and Borough (02-282) effective September 22, 1992.
• Yellowstone National Park (county equivalent), Montana (30-113):
  Annexed to Gallatin (30-031) and Park (30-067) counties effective November 7, 1997.
• South Boston (independent) city, Virginia (51-780):
  Changed to town status and added to Halifax County (51-083) effective June 30, 1995.

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

• Dade County, Florida (12-025):
  Renamed as Miami-Dade County (12-086) effective July 22, 1997.
• Miami-Dade County, Florida (12-086):
  Renamed from Dade County (12-025) effective July 22, 1997.
• DeKalb County, Indiana (18-033):
  Name corrected from De Kalb County
• LaGrange County, Indiana (18-087):
  Name corrected from Lagrange County.
• LaPorte County, Indiana (18-091):
  Name corrected from La Porte County.
• De Baca County, New Mexico (35-011):
  Name corrected from DeBaca County (erroneously changed in the 1980s).
• McKean County, Pennsylvania (42-083):
  Name corrected from Mc Kean County.

Substantial County or County Equivalent Entity Boundary Changes

• Southeast Fairbanks Census Area, Alaska (02-240):
  Unpopulated part taken to create the new Denali Borough (02-068) effective December 7, 1990.
• Yukon-Koyukuk Census Area, Alaska (02-290):
  Part taken to create the new Denali Borough (02-068) effective December 7, 1990; 1990 detached population: 1,682.
• Franklin County, Florida (12-037):
  Boundary correction added unpopulated part of Gulf County (12-045); estimated area added: 10.4 square miles.
• Gulf County Florida (12-045):
  Boundary correction detached unpopulated part to Franklin County (12-037); estimated area detached: 10.4 square miles.
• Montgomery County, Maryland (24-031):
  Added territory (Takoma Park city) from Prince George?s County (24-033) effective July 1, 1997; 1990 added population: 5,156.
• Prince George's County, Maryland (24-033):
  Lost territory (Takoma Park city) to Montgomery County (24-031) effective July 1, 1997; 1990 detached population: 5,156.
• Gallatin County, Montana (30-031):
  Annexed unpopulated portion of deleted Yellowstone National Park (county equivalent) (30-113) effective November 7, 1997.
• Park County, Montana (30-067):
  Annexed portion of deleted Yellowstone National Park (county equivalent) (30-113) effective November 7, 1997; 1990 added population: 52.
• Carteret County, North Carolina (37-031):
  Boundary correction added from and detached unpopulated parts to Craven County (37-049); estimated area added: five square miles; estimated area detached: 16 square miles.
• Craven County, North Carolina (37-049):
  Boundary correction added from and detached unpopulated parts to Carteret County (37-031); estimated area added: 16 square miles; estimated area detached: five square miles.
• Augusta County, Virginia (51-015):
  Part annexed to Waynesboro (independent) city (51-820) effective July 1, 1994; no estimated population available.
• Bedford County, Virginia (51-019):
  Part annexed to Bedford (independent) city (51-515) effective July 1, 1993; estimated population: 200.
• Fairfax County, Virginia (51-059):
  Parts annexed to Fairfax (independent) city (51-600) effective December 31, 1991 and January 1, 1994; estimated population: 400.
• Halifax County, Virginia (51-083):
  Added the former independent city of South Boston (51-780) effective June 30, 1995.
• Prince William County, Virginia (51-153):
  Part annexed to Manassas Park (independent) city (51-685) effective December 31, 1990; no estimated population available.
• Southampton County, Virginia (51-175):
  Part annexed to Franklin (independent) city (51-620) effective December 31, 1995; estimated population: 400.
• Bedford (independent) city, Virginia (51-515):
  Annexed part of Bedford County (51-019) effective July 1, 1993; estimated population: 200.
• Fairfax (independent) city, Virginia (51-600):
  Annexed parts of Fairfax County (51-059) effective December 31, 1991 and January 1, 1994; estimated population: 400.
• Franklin (independent) city, Virginia (51-620):
  Annexed part of Southampton County (51-175) effective December 31, 1995; estimated population: 400.
• Manassas Park (independent) city, Virginia (51-685):
  Annexed part of Prince William County (51-153) effective December 31, 1990; no estimated population available.
• Waynesboro (independent) city, Virginia (51-820):
  Annexed part of Augusta County (51-015) effective July 1, 1994; no estimated population available.
• Arecibo Municipio, Puerto Rico (72-013):
  Lost territory to Florida Municipio (72-054) effective February 8, 1998; estimated population: 45.
• Barceloneta Municipio, Puerto Rico (72-017):
  Lost territory to Florida Municipio (72-054) effective February 8, 1998; estimated population: 1,860.
• Florida Municipio, Puerto Rico (72-054):
  Gained territory from Arecibo Municipio (72-013), Barceloneta Municipio (72-017), and Manatí Municipio (72-091) effective February 8, 1998; estimated population: 1,905.
• Manatí Municipio, Puerto Rico (72-091):
  Lost territory to Florida Municipio (72-054) effective February 8, 1998; estimated population: 0.