Carnelian Bay (formerly, Cornelian Bay) The Carnelian Bay post office opened in 1908.<br>1850–1870 1880-1890<br> 1900 1910 1920<br> 1930 1940 1950<br> 1960 1970 1980<br> 1990
2000 2010
Carnelian Bay first appeared as a census designated place in the 2010 U.S. census. 95.0% of residents lived in urban areas, while 5.0% lived in rural areas.
The whole population lived in households. There were 246 households, out of which 46 (18.7%) had children under the age of 18 living in them, 99 (40.2%) were married-couple households, 22 (8.9%) were cohabiting couple households, 67 (27.2%) had a female householder with no partner present, and 58 (23.6%) had a male householder with no partner present. 78 households (31.7%) were one person, and 21 (8.5%) were one person aged 65 or older. The average household size was 2.11.
There were 919 housing units at an average density of , of which 246 (26.8%) were occupied. Of these, 176 (71.5%) were owner-occupied, and 70 (28.5%) were occupied by renters. The homeowner vacancy rate was 0.0% and the rental vacancy rate was 40.8%.