population of rio grande county
Population of Rio Grande County. 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 miÂ² (=2362.9 kmÂ²), in this year population density was 13.18 p/miÂ².