Last official estimated population of Rio Grande County was 12,020 (year 2014)[1]. This was 0.004% of total US population and 0.2% of total Colorado state population. Area of Rio Grande County is 912.3 mi² (=2362.9 km²), in this year population density was 13.18 p/mi². If population growth rate would be same as in period 2010-2014 (+0.08%/yr), Rio Grande County population in 2026 would be 12,135 [0].
Historical population of Rio Grande County for period 1880-2014 [1] , [2] , [3]:
Estimated population for 2014[1]. Population density is in p./sq.mi [4]. Changes are for period 2010-2015. Value is %/year. Boundary lines are approx. 2012 [5]. Click on flag to hide it.
Population • Density • Changes • Legends • Position
[1880-1890] +5.91 %/yr
[1890-1900] +1.69 %/yr
[1900-1910] +4.87 %/yr
[1910-1920] +1.81 %/yr
[1920-1930] +2.4 %/yr
[1930-1940] +2.23 %/yr
[1940-1950] +0.34 %/yr
[1950-1960] -1.39 %/yr
[1960-1970] -0.61 %/yr
[1970-1980] +0.02 %/yr
[1980-1990] +0.24 %/yr
[1990-2000] +1.44 %/yr
[2000-2005] -0.35 %/yr
[2005-2010] -0.37 %/yr
[2010-2014] +0.08 %/yr
Looking for settlements in Rio Grande County? Visit this page: Settlements in Rio Grande County, CO
Population of Rio Grande County by age groups male (M) and female (F)[1b]
| Age Gr. | (M) | (F) | Total |
| 0 to 4 | 379 | 358 | 737 |
| 5 to 9 | 384 | 378 | 762 |
| 10 to 14 | 415 | 379 | 794 |
| 15 to 19 | 380 | 354 | 734 |
| 20 to 24 | 344 | 352 | 696 |
| 25 to 29 | 354 | 337 | 691 |
| 30 to 34 | 315 | 320 | 635 |
| 35 to 39 | 300 | 308 | 608 |
| 40 to 44 | 296 | 331 | 627 |
| 45 to 49 | 311 | 341 | 652 |
| 50 to 54 | 376 | 398 | 774 |
| 55 to 59 | 459 | 440 | 899 |
| 60 to 64 | 430 | 405 | 835 |
| 65 to 69 | 350 | 355 | 705 |
| 70 to 74 | 283 | 288 | 571 |
| 75 to 79 | 163 | 167 | 330 |
| 80 to 84 | 120 | 141 | 261 |
| 85+ | 133 | 163 | 296 |
Rio Grande County resident population estimates by Sex, Race, and Hispanic Origin[1b]. For full list of abbrevations see: population.us/about page.
| Race | Male | Female | Total |
| WAC | 5514 | 5549 | 11,063 |
| WA | 5412 | 5431 | 10,843 |
| NH | 3204 | 3273 | 6,477 |
| NHWAC | 3100 | 3154 | 6,254 |
| NHWA | 3057 | 3089 | 6,146 |
| H | 2588 | 2542 | 5,130 |
| HWAC | 2414 | 2395 | 4,809 |
| HWA | 2355 | 2342 | 4,697 |
| IAC | 257 | 267 | 524 |
| IA | 190 | 193 | 383 |
| HIAC | 187 | 162 | 349 |
| HIA | 144 | 124 | 268 |
| TOM | 109 | 127 | 236 |
| NHIAC | 70 | 105 | 175 |
| BAC | 78 | 63 | 141 |
| HTOM | 62 | 58 | 120 |
| NHTOM | 47 | 69 | 116 |
| NHIA | 46 | 69 | 115 |
| AAC | 49 | 57 | 106 |
| NHBAC | 42 | 39 | 81 |
| BA | 50 | 29 | 79 |
| NHAAC | 36 | 40 | 76 |
| AA | 30 | 31 | 61 |
| HBAC | 36 | 24 | 60 |
| NHAA | 26 | 23 | 49 |
| NHBA | 27 | 20 | 47 |
| HBA | 23 | 9 | 32 |
| HAAC | 13 | 17 | 30 |
| NAC | 8 | 11 | 19 |
| NHNAC | 6 | 7 | 13 |
| HAA | 4 | 8 | 12 |
| HNAC | 2 | 4 | 6 |
| NA | 1 | 4 | 5 |
| NHNA | 1 | 3 | 4 |
| HNA | 0 | 1 | 1 |
• Rio Arriba County population
68.7 mi, 
191°
• Alamosa County
36.9 mi, 
81°
• Archuleta County
38.2 mi, 
239°
• Conejos County
24.2 mi, 
141°
• Saguache County
39.6 mi, 
17°
• Custer County
72.7 mi, 
54°
• Costilla County
58 mi, 
104°
• Hinsdale County
53.7 mi, 
295°
• San Juan County
69.6 mi, 
287°
• Mineral County
28.6 mi, 293°
[0] Calculated by population.us from last known population growth rate, not official data.
[1] County population - 2014, archived from the original, retrieved 02/23/2016
[1b] Annual County Resident Population Estimates by Age, Sex, Race, and Hispanic Origin, (used only data for 2014) archived from the original, retrieved 02/23/2016
[2] County population - 2000-2010, archived from the original, retrieved 02/23/2016
[3] Population of States and Counties of the United States: 1790 to 1992, PDF, 15 Mb, census.gov, retrieved 02/23/2016
[4] County area, latitude longitude data, retrieved 02/23/2016
[5] County boundaries, CSV files on boundaries.us, retrived 03/18/2016
*Conejos, Costilla Colorado Notes
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