VIII. NUMBERS OF DECENNIAL Census Geographic Areas Estimated 1980 1990 Number Number* LEGAL AREAS United States 1 1 States and statistically equivalent areas 57 60 States 50 50 DC 1 1 Outlying areas 6 9 Counties, parishes, and statistically equivalent areas 3,231 3,286 Minor Civil Divisions 30,491 30,537 Incorporated Places 19,176 19,375 American Indian Reservations 275 310 Alaska Native Villages 209 ---- Alaska Native Regional Corporations 12 12 Voting Districts (Election Precincts) 36,361 148,000 Statistical Areas Alaska Native Village Statistical Areas --- 217 Tribal Designated Statistical Areas --- 19 Tribal Jurisdiction Statistical Areas --- 17 Census County Divisions 5,512 5,581 Unorganized Territories 274 282 Other Statistically Equivalent Areas 62 40 Census Designated Places 3,733 5,350 Census Tracts 43,383 50,400 Block Numbering Areas 3,404 11,600 Block Groups 156,163 230,600 Blocks 2,473,679 7,000,000 *Number of areas will be different in 1990 census data files because the TIGER/Line files include the Marshall Islands, Federated States of Micronesia, and the Midway Islands. --- Not applicable