312 Area Code

10 cities use the 312 area code in Illinois.

The 312 area code spans 2 counties in Illinois.

Median age: 39.32

Median age in Area Code 312 is 39.32 years. 10.36% of residents are aged 0-9. 12.03% of residents are aged 10-19. The percentage of residents in their twenties is 14.83. 15.19 % are in their thirties, 12.51% in their fourties, 13.39 % in their fifties, and 11.45 % in their sixties. 6.55 % of residents are in their seventies and 3.68 % are eighty and over.

51.39% are female
48.61% are male

48.61% of residents in Area Code 312 are male and 51.39% are female. 48.68% of residents are married and 9.82% are divorced. 36.88% have never been married. 4.61% are widowed. The average size of resident families is 3.02.

Median household income: 102,465.13
58.94% have two income earners
49.19% of households earn $100,000+

Median household income in Area Code 312 is $102,465.13 with 58.94% of families having two income earners. 49.19% of households earn at least $100,000. 3.60% of households have an income under $5,000, 2.02% from $5,000-$10,000, 2.42% from $10,000-$15,000, 2.92% from $15,000-$20,000, 2.52% from $20,000-$25,000, 5.22% from $25,000-$35,000, 7.66% from $35,000-$50,000, 12.99% from $50,000-$75,000, 11.45% from $75,000-$100,000, 17.97% from $100,000-$150,000 and 31.22% over $150,000. The median income of individuals is $54,277.96.

Median home value: $365,724.34
Median rent: $1,636.18
Rent burden: 29.70%

63.89% of households in Area Code 312 own (rather than rent) their residence. The median value of those homes is $365,724.34. The median rent paid by renters is $1,636.18 or 29.70% of the median renter's household income.

46.85% have a Science and Engineering degree

5.83% of residents in Area Code 312 have less than a high school education. 14.90% have a high school diploma but no more. 21.62% of residents have some college but no more. 31.03% have a bachelor's degree (or equivalent) but no more. 26.64% have a graduate degree. 46.85% have a Bachelor's degree or higher in a Science and Engineering (or related) field.

29.60 minutes of commute time

68.12% of residents in Area Code 312 16 and older are in the labor force. 5.79% of residents are unemployed. The median commute time of resident workers in Area Code 312 is 29.60 minutes.

12.13% report being Hispanic

63.90% of residents in Area Code 312 report their race as White. 13.34% report their race as Black or African American. 13.42% report their race as Asian. 0.24% report their race as American Indian and Alaska Native. 0.07% report their race as Native Hawaiian and Other Pacific Islander. 3.25% report their race as Some other race. 5.78% report their race as Two or more races. 12.13% report being Hispanic. Note: Hispanic is considered to be an ethnicity and not a race.

8.98% report a disability
4.57% speak limited English
4.95% have no health insurance
3.86% are veterans

8.98% of residents in Area Code 312 report a disability. 4.57% of residents only speak limited English. 4.95% of residents report not having health insurance. 3.86% of residents are veterans.

There are 32 ZIP codes within the 312 area code, covering cities across 2 counties in Illinois.

• 217 (Peoria, IL)
• 224 (Chicago, IL)
• 309 (Peoria, IL)
• 331 (Chicago, IL)
• 447 (Champaign, IL)
• 464 (Chicago, IL)
• 618 (Chicago, IL)
• 630 (Chicago, IL)
• 708 (Chicago, IL)
• 773 (Chicago, IL)
• 779 (Chicago, IL)
• 815 (Chicago, IL)
• 847 (Chicago, IL)
• 872 (Chicago, IL)