According to the United States Census Bureau, the CDP has a total area of 12.1 square miles (31km2), all of it land.
Climate
East-Quincy is underlain by metasedimentary rock of the Shoo Fly Complex.[4] Its dominant silica-rich clastic material weathers to a stony coarse soil which includes the well or somewhat excessively drained alluvial fan material (mainly Forgay very gravelly sandy loam) on which most of Quincy's businesses and homes have been built. Cultivated land north of the residential area lies on poorly drained loam, silt loam or fine sandy loam.[5]
East-Quincy has a Mediterranean climate (KöppenCsb) though its inland location and altitude makes it more continental and wetter than usual for this type, with very heavy snowfalls sometimes occurring in winter – the record being 133 inches (337.8cm) in the very wet January 1916.[6][7] Although summer days are hot and only 1.4 days per winter fail to top 32°F (0°C), nights can be very cold and frosts occur on 179 days per year and have been recorded even in July.
The census reported that 98.9% of the population lived in households and 1.1% were institutionalized.[25]
There were 1,094 households, out of which 27.9% included children under the age of 18, 39.9% were married-couple households, 10.1% were cohabiting couple households, 28.6% had a female householder with no partner present, and 21.4% had a male householder with no partner present. 32.7% of households were one person, and 15.2% were one person aged 65 or older. The average household size was 2.23.[25] There were 630 families (57.6% of all households).[26]
The age distribution was 21.2% under the age of 18, 6.8% aged 18 to 24, 25.0% aged 25 to 44, 25.9% aged 45 to 64, and 21.2% who were 65years of age or older. The median age was 42.5years. For every 100 females, there were 102.7 males.[25]
There were 1,168 housing units at an average density of 96.4 unitsper square mile (37.2 units/km2), of which 1,094 (93.7%) were occupied. Of these, 64.7% were owner-occupied, and 35.3% were occupied by renters.[25]
In 2023, the US Census Bureau estimated that the median household income was $71,591, and the per capita income was $36,196. About 6.8% of families and 9.6% of the population were below the poverty line.[27]
2010
At the 2010 census East Quincy had a population of 2,489. The population density was 205.6 inhabitants per square mile (79.4/km2). The racial makeup of East Quincy was 2,174 (87.3%) White, 79 (3.2%) African American, 43 (1.7%) Native American, 15 (0.6%) Asian, 0 (0.0%) Pacific Islander, 32 (1.3%) from other races, and 146 (5.9%) from two or more races. Hispanic or Latino of any race were 161 people (6.5%).[28]
The census reported that 2,451 people (98.5% of the population) lived in households, no one lived in non-institutionalized group quarters and 38 (1.5%) were institutionalized.
There were 1,081 households, 299 (27.7%) had children under the age of 18 living in them, 469 (43.4%) were opposite-sex married couples living together, 114 (10.5%) had a female householder with no husband present, 64 (5.9%) had a male householder with no wife present. There were 77 (7.1%) unmarried opposite-sex partnerships, and 11 (1.0%) same-sex married couples or partnerships. 333 households (30.8%) were one person and 102 (9.4%) had someone living alone who was 65 or older. The average household size was 2.27. There were 647 families (59.9% of households); the average family size was 2.78.
The age distribution was 525 people (21.1%) under the age of 18, 261 people (10.5%) aged 18 to 24, 559 people (22.5%) aged 25 to 44, 796 people (32.0%) aged 45 to 64, and 348 people (14.0%) who were 65 or older. The median age was 42.1 years. For every 100 females, there were 103.5 males. For every 100 females age 18 and over, there were 106.3 males.
There were 1,170 housing units at an average density of 96.6 per square mile, of the occupied units 665 (61.5%) were owner-occupied and 416 (38.5%) were rented. The homeowner vacancy rate was 1.9%; the rental vacancy rate was 4.8%. 1,522 people (61.1% of the population) lived in owner-occupied housing units and 929 people (37.3%) lived in rental housing units.
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