| State: Colorado |
|
(08 CO) |
| All legal boundaries of governmental units are as reported through the Census Bureau’s 2003 Boundary and Annexation Survey, unless otherwise noted. |
| Area |
Effective Date |
Change |
| Adams County |
11/15/01 |
area partially reduced by formation of Broomfield County |
| Arriba town |
01/01/00 |
Census place code change, from 0030 to 0035 |
| Bennett town |
06/22/99 |
annexation into Arapahoe County |
| Berthoud town |
12/24/96 |
annexation into Weld County |
| Black Hawk city |
01/01/90 |
area description change, from town to city |
| Bonanza town |
01/01/90 |
name change, from Bonanza City town to Bonanza town; FIPS place code
change, from 07575 to 07571 |
| Boulder County |
11/15/01 |
area partially reduced by formation of Broomfield County |
| Brighton city |
03/15/91 |
annexation into Weld County |
| Broomfield County |
11/15/01 |
new county (FIPS code 014) organized from parts of four counties: Adams,
Boulder, Jefferson, and Weld; coextensive with Broomfield city |
| Carbondale town |
01/01/90 |
FIPS change, from 12030 to 12045 |
| Castle Rock town |
01/01/90 |
area description change, from city to town |
| Centennial city, Arapahoe County |
02/07/01 |
new incorporation (FIPS: 12815) |
| Foxfield town, Arapahoe County |
12/13/94 |
incorporation (Census place: 0483; FIPS: 28105) |
| Jefferson County |
11/15/01 |
area partially reduced by formation of Broomfield County |
| Johnstown town |
06/07/99 |
annexation into Larimer County (Census place code: 0690; FIPS code: 39855) |
| Keota town |
02/19/91 |
disincorporation |
| Littleton city |
12/27/90 |
annexation into Jefferson County |
| Lone Tree city, Douglas County |
12/29/96 |
incorporation (Census place: 0817; FIPS: 45955) |
| Longmont city |
05/25/90 |
annexation into Weld County |
| Mountain Village town, San Miguel County |
03/10/95 |
incorporation (Census place: 0926; FIPS: 52550) |
| Prospect Heights town |
06/14/94 |
disincorporation |
| South Fork town, Rio Grande County |
05/01/92 |
incorporation (Census place: 1237; FIPS: 72395) |
| Thornton city |
04/15/91 |
annexation into Weld County |
| Weld County |
11/15/01 |
area partially reduced by formation of Broomfield County |
| Windsor town |
11/14/94 |
annexation into Larimer County |
