2020 census As of the
2020 census, Mount Shasta had a population of 3,223 and a population density of . The census reported that 99.6% of the population lived in households, 0.4% lived in non-institutionalized group quarters, and no one was institutionalized. There were 1,662 households, out of which 20.7% had children under the age of 18. Of all households, 31.6% were married-couple households, 7.8% were
cohabiting couple households, 35.9% had a female householder with no spouse or partner present, and 24.7% had a male householder with no spouse or partner present. 44.9% of households were one person, and 25.3% were one person aged 65 or older. The average household size was 1.93, and there were 802
families (48.3% of all households).
2010 census The
2010 United States census reported that Mount Shasta had a population of 3,394. The population density was . The racial makeup of Mount Shasta was 3,041 (89.6%)
White, 61 (1.8%)
African American, 19 (0.6%)
Native American, 56 (1.6%)
Asian, 2 (0.1%)
Pacific Islander, 51 (1.5%) from
other races, and 164 (4.8%) from two or more races.
Hispanic or
Latino of any race were 277 persons (8.2%). The Census reported that 3,358 people (98.9% of the population) lived in households, 6 (0.2%) lived in non-institutionalized group quarters, and 30 (0.9%) were institutionalized. There were 1,664 households, out of which 401 (24.1%) had children under the age of 18 living in them, 537 (32.3%) were married couples, 190 (11.4%) had a female householder with no husband present, 84 (5.0%) had a male householder with no wife present. There were 113 (6.8%) unmarried couples, and only 9 (0.5%) same-sex couples. 719 households (43.2%) were made up of individuals, and 285 (17.1%) had someone living alone who was 65 years of age or older. The average household size was 2.02. There were 811
families (48.7% of all households); the average family size was 2.79. The population was spread out, with 692 people (20.4%) under the age of 18, 242 people (7.1%) aged 18 to 24, 732 people (21.6%) aged 25 to 44, 1,109 people (32.7%) aged 45 to 64, and 619 people (18.2%) who were 65 years of age or older. The median age was 45.7 years. For every 100 females, there were 84.7 males. For every 100 females age 18 and over, there were 80.6 males. There were 1,895 housing units at an average density of , of which 781 (46.9%) were owner-occupied, and 883 (53.1%) were occupied by renters. The homeowner vacancy rate was 2.5%; the rental vacancy rate was 5.8%. 1,699 people (50.1% of the population) lived in owner-occupied housing units and 1,659 people (48.9%) lived in rental housing units. ==Economy==