| Year | North Latitude | West Longitude |
|---|---|---|
| 18801 | 39° 05′ 23″ | 105° 32′ 53″ |
| 18901 | 39° 09′ 52″ | 105° 14′ 10″ |
| 19001 | 39° 05′ 45″ | 105° 16′ 05″ |
| 19101 | 39° 11′ 53″ | 105° 11′ 28″ |
| 19201 | 39° 14′ 53″ | 105° 01′ 24″ |
| 19302 | 39° 13′ 07″ | 104° 58′ 24″ |
| 19402 | 39° 13′ 42″ | 105° 05′ 46″ |
| 19503 | 39° 20′ 32″ | 105° 05′ 57″ |
| 19603 | 39° 22′ 40″ | 105° 08′ 04″ |
| 19703 | 39° 26′ 37″ | 105° 07′ 36″ |
| 19804 | 39° 29′ 11″ | 105° 10′ 52″ |
| 19905 | 39° 29′ 34″ | 105° 11′ 18″ |
| 20006 | 39° 30′ 02″ | 105° 12′ 13″ |
| 20106 | 39° 30′ 48″ | 105° 12′ 29″ |
| 20206 | 39° 32' 05" | 105° 11' 07" |
1 Source: U.S. Department of Commerce, Bureau of the Census, Fourteenth Census of the United States, 1923
2 Source: U.S. Census Bureau, recomputation for historical county level data which relied upon aggregate county level population data with an estimated county centroid resulting in a possible error of up to one mile.
3 Source: U.S. Department of Commerce, Bureau of the Census, Centers of Population for States and Counties, 1974
4 Source: U.S. Census Bureau, Geography Division, recomputation from archived national block group/enumeration area data resulting in a possible error of up to 1,000 feet.
5 Source: U.S. Census Bureau, Geography Division, recomputation from archived national block group data resulting in a possible error of up to 1,000 feet.
6 Source: U.S. Census Bureau, computation from national block-level data