Atlanta-Decatur Division GA Demographic Data and Boundary Map
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Atlanta-Decatur Division, GA
The Atlanta-Decatur Division is a County Subdivision of DeKalb County.
The subdivision has a Z5 Census Class Code which indicates that the Atlanta-Decatur Division is a statistical county subdivision.
Atlanta-Decatur Division Data & Demographics (As of July 1, 2025)
POPULATION
Total Population
399,085 (100%)
Population in Households
389,014 (97.5%)
Population in Families
294,632 (73.8%)
Population in Group Quarters1
10,071 ( 2.5%)
Population Density
3,204
Diversity Index2
63
INCOME
Median Household Income
$82,471
Average Household Income
$123,086
% of Income for Mortgage4
29%
Per Capita Income
$49,024
Wealth Index5
100
HOUSING
Total HU (Housing Units)
174,054 (100%)
Owner Occupied HU
89,257 (51.3%)
Renter Occupied HU
69,479 (39.9%)
Vacant Housing Units
15,318 ( 8.8%)
Median Home Value
$377,270
Average Home Value
$472,383
Housing Affordability Index3
80
HOUSEHOLDS
Total Households
158,736
Average Household Size
2.45000000000
Family Households
89,478
Average Family Size
3
NOTES
Group Quarters - a place where people live or stay in a group living arrangement. Includes college residents halls, nursing facilities, military barracks, and correctional facilities.
The Diversity Index is a scale of 0 to 100 that represents the likelihood that two persons, chosen at random from the same area, belong to different races or ethnic groups. If an area's entire population belongs to one race AND one ethnic group, then the area has zero diversity. An area's diversity index increases to 100 when the population is evenly divided into two or more race/ethnic groups.
The Housing Affordability Index base is 100 and represents a balance point where a resident with a median household income can normally qualify to purchase a median price home. Values above 100 indicate increased affordability, while values below 100 indicate decreased affordability.
The % of Income for Mortgage quantifies the percentage of median household income dedicated to mortgage payments on a home priced at the median value (assuming a 30-year mortgage and a 20% down payment).
The Wealth Index is based on a number of indicators of affluence including average household income and average net worth, but it also includes the value of material possessions and resources. It represents the wealth of the area relative to the national level. Values above or below 100 represent above-average wealth or below-average wealth compared to the national level.
