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52.1% are female
47.9% are male

47.9% of residents in ZIP 37221 are male and 52.1% are female. 55.1% of residents are married and 12.6% are divorced. 27.1% have never been married. 5.2% are widowed. The average size of resident families is 2.94.

4% report being Hispanic

83.2% of residents in ZIP 37221 report their race as White. 7.8% report their race as Black or African American. 3.4% report their race as Asian. 0% report their race as American Indian and Alaska Native. 0% report their race as Native Hawaiian and Other Pacific Islander. 1.5% report their race as Some other race. 4.1% report their race as Two or more races. 4% report being Hispanic. Note: Hispanic is considered to be an ethnicity and not a race.

43.3% have a Science and Engineering degree

4% of residents in ZIP 37221 have less than a high school education. 13.6% have a high school diploma but no more. 24.5% of residents have some college but no more. 32.8% have a bachelor's degree (or equivalent) but no more. 25% have a graduate degree. 43.3% have a Bachelor's degree or higher in a Science and Engineering (or related) field.

Median household income: 90660
63.7% have two income earners
43.6% of households earn $100,000+

Median household income in ZIP 37221 is $90660 with 63.7% of families having two income earners. 43.6% of households earn at least $100,000. 2% of households have an income under $5,000, 1% from $5,000-$10,000, 1.6% from $10,000-$15,000, 1.9% from $15,000-$20,000, 2.1% from $20,000-$25,000, 5% from $25,000-$35,000, 10.9% from $35,000-$50,000, 16.7% from $50,000-$75,000, 15.1% from $75,000-$100,000, 21.8% from $100,000-$150,000 and 21.8% over $150,000. The median income of individuals is $49335.