Total County Population in thousands, most recent data available
(Source: U.S. Department of Commerce: US Census Bureau)

La Plata Montezuma Archuleta
1970 19.199 12.952 2.733
1971 20.100 13.500 2.500
1972 21.500 14.000 2.400
1973 21.900 13.800 2.700
1974 22.600 14.200 2.800
1975 23.600 15.000 3.000
1976 25.200 15.000 3.200
1977 26.300 15.300 3.300
1978 27.000 15.500 3.300
1979 27.200 16.300 3.500
1980 27.195 16.510 3.664
1981 28.309 17.252 4.039
1982 29.346 17.999 4.296
1983 30.118 18.666 4.538
1984 30.784 19.275 4.639
1985 31.371 19.210 4.847
1986 31.300 19.156 4.891
1987 31.288 18.726 5.005
1988 31.313 18.693 5.119
1989 31.695 18.592 5.166
1990 32.505 18.732 5.382
1991 33.684 19.104 5.557
1992 34.966 19.728 5.725
1993 36.550 20.443 6.119
1994 37.843 21.255 6.511
1995 39.568 22.035 7.098
1996 40.761 22.588 7.896
1997 41.654 22.989 8.498
1998 42.318 23.210 9.109
1999 43.049 23.601 9.510
2000 44.256 23.855 9.989
2001 45.130 23.700 10.447
2002 46.015 23.942 10.906
2003 46.307 24.254 11.135
2004 46.969 24.438 11.338
2005 47.863 24.478 11.591
2006 48.910 24.915 12.066
2007 49.773 25.103 12.432
2008 50.812 25.166 12.455
2009 51.710 25.442 12.406
2010 51.442 25.530 12.068
2011 51.917 25.442 12.013
2012 52.401 25.431 12.070
2013 53.284 25.642 12.194