Census tract · Cobb County
Census Tract 308, Cobb County, Georgia
Census Tract 308, GEOID 13067030800, in Cobb County, Georgia, mostly within Marietta (88% of its census blocks). 5,918 residents in the ACS 2020-2024 5-year estimates (±627); the 2020 Census counted 5,617.
Residents, 2020-2024
5,918
±627 (90% margin)
2020 Census count: 5,617
Median household income
$70,530
±$14,749 (90% margin)
Cobb County: $102,738
Median home value
$456,900
±$66,988 (90% margin)
Cobb County: $407,200
Median gross rent
$1,285
±$130 (90% margin)
Cobb County: $1,730
Where is Census Tract 308?
Census Tract 308 is one of 186 census tracts in Cobb County, Georgia. It covers 2.44 square miles of land, 2,300 residents per square mile in 2020. Its GEOID, 13067030800, names it uniquely (how tract numbers and GEOIDs work).
| Place | Share of the tract |
|---|---|
| Marietta | 88% |
5 census tracts border Census Tract 308: Tract 304.11 ($51,372), Tract 304.12 ($56,824), Tract 307 ($73,542), Tract 309.12 ($61,207) and Tract 310.01 ($66,423). The figure in brackets is each tract's median household income.
Whether a tract counts as low- or moderate-income for bank lending (the Community Reinvestment Act) is set by the FFIEC against its metro area's family income: look it up in the FFIEC census geocoder.
Source: 2024 Gazetteer and 2020 block assignment files, U.S. Census Bureau · Census reference files
How many people live in Census Tract 308?
The 2020-2024 American Community Survey puts Census Tract 308's population at 5,918 (±627) in 1,678 households; the 2020 Census counted 5,617 residents and 1,796 housing units.
| Measure | Tract 308 | Marietta |
|---|---|---|
| Total population | 5,918 ±627 | 62,263 |
| Households | 1,678 ±171 | 24,707 |
| Average household size | 2.35 ±0.30 | 2.40 |
| Housing units | 1,792 ±161 | 26,783 |
Source: American Community Survey 2020-2024 5-year estimates, U.S. Census Bureau (released January 2026); 2020 Census P.L. 94-171 · Check it at data.census.gov
Who lives in Census Tract 308?
The median resident of Census Tract 308 is 24.0 years old; 12.3% are under 18 and 6.2% are 65 or older. The largest group is non-Hispanic white residents at 37.4%, then Hispanic or Latino residents (of any race) at 30.6%. 22.0% of residents were born outside the United States.
| Measure | Tract 308 | Marietta |
|---|---|---|
| Median age | 24.0 ±1.9 | 34.8 |
| Under 18 years | 12.3% ±4.6 pts | 21.4% |
| 65 years and over | 6.2% ±3.1 pts | 13.9% |
| Hispanic or Latino (any race) | 30.6% ±7.5 pts | 18.1% |
| White alone, not Hispanic | 37.4% ±5.0 pts | 41.4% |
| Black or African American alone, not Hispanic | 24.5% ±5.6 pts | 30.8% |
| Asian alone, not Hispanic | 2.5% ±1.9 pts | 2.2% |
| American Indian and Alaska Native alone, not Hispanic | 0.2% ±0.3 pts | 0.2% |
| Native Hawaiian and Other Pacific Islander alone, not Hispanic | 0.0% ±0.8 pts | 0.0% |
| Two or more races, not Hispanic | 4.8% ±2.9 pts | 6.2% |
| Some other race alone, not Hispanic | 0.0% ±0.8 pts | 1.0% |
| Born outside the United States | 22.0% ±8.6 pts | 18.1% |
| Speak a language other than English at home (age 5+) | 29.8% ±8.9 pts | 24.9% |
| Civilian veterans (age 18+) | 5.4% ±2.4 pts | 4.9% |
| With a disability | 7.0% ±2.2 pts | 9.9% |
| No health insurance coverage | 22.4% ±9.1 pts | 17.9% |
| High school graduate or higher (age 25+) | 83.0% ±10.7 pts | 90.1% |
| Bachelor's degree or higher (age 25+) | 45.5% ±11.7 pts | 47.4% |
| Graduate or professional degree (age 25+) | 15.8% ±5.7 pts | 16.2% |
| Lived in the same house a year earlier | 71.7% ±7.9 pts | 81.0% |
Source: American Community Survey 2020-2024 5-year estimates, U.S. Census Bureau (released January 2026) (Data Profiles DP02, DP05) · Check it at data.census.gov
What do households in Census Tract 308 earn?
Half of the 1,678 households in Census Tract 308 earn less than $70,530 a year (±$14,749), against $102,738 across Cobb County: 158th highest of the county's 186 tracts with a reliable estimate. 10.1% of residents live below the poverty line.
| Measure | Tract 308 | Marietta |
|---|---|---|
| Median household income | $70,530 ±$14,749 | $72,725 |
| Mean household income | $127,513 ±$25,325 | $109,482 |
| Per capita income | $39,598 ±$8,657 | $44,683 |
| People below the poverty line | 10.1% ±4.7 pts | 12.8% |
| Children under 18 below the poverty line | 15.1% ±13.9 pts | 15.3% |
| Households receiving SNAP | 6.6% ±4.1 pts | 8.9% |
| Households with a computer | 97.9% ±2.7 pts | 97.6% |
| Households with a broadband subscription | 95.5% ±2.6 pts | 94.0% |
Source: American Community Survey 2020-2024 5-year estimates, U.S. Census Bureau (released January 2026) (Data Profile DP03) · Check it at data.census.gov
What does housing cost in Census Tract 308?
Owners occupy 55.2% of Census Tract 308's occupied homes and renters 44.8%. The median owner-occupied home is valued at $456,900 by its owner (±$66,988). The median renter pays $1,285 a month including utilities, and 44.2% of renters pay 35% or more of their income on rent.
| Measure | Tract 308 | Marietta |
|---|---|---|
| Median home value (owner-occupied) | $456,900 ±$66,988 | $448,500 |
| Median gross rent | $1,285 ±$130 | $1,586 |
| Renters paying 35% or more of income on rent | 44.2% ±19.3 pts | 46.1% |
| Median monthly owner costs, with a mortgage | $2,360 ±$318 | $2,170 |
| Owner-occupied homes | 55.2% ±8.9 pts | 47.2% |
| Renter-occupied homes | 44.8% ±8.9 pts | 52.8% |
| Housing units | 1,792 ±161 | 26,783 |
| Single-family detached homes | 39.1% ±7.0 pts | 42.8% |
| Mobile homes | 0.0% ±2.6 pts | 0.3% |
| Built 2020 or later | 7.9% ±3.9 pts | 1.4% |
| Built 2010 to 2019 | 15.1% ±6.2 pts | 9.0% |
| Built 1939 or earlier | 11.0% ±7.3 pts | 1.7% |
| Households with no vehicle | 12.0% ±8.1 pts | 8.8% |
Source: American Community Survey 2020-2024 5-year estimates, U.S. Census Bureau (released January 2026) (Data Profile DP04) · Check it at data.census.gov
How do people in Census Tract 308 get to work?
53.1% of Census Tract 308's workers drive alone and 15.6% work from home. The average trip to work takes 22.4 minutes. The unemployment rate in 2020-2024 averaged 7.3%.
| Measure | Tract 308 | Marietta |
|---|---|---|
| In the labor force (age 16+) | 64.4% ±5.0 pts | 68.2% |
| Unemployment rate | 7.3% ±4.4 pts | 3.8% |
| Drove alone to work | 53.1% ±10.0 pts | 63.2% |
| Carpooled | 13.2% ±10.0 pts | 10.3% |
| Public transportation | 2.5% ±1.8 pts | 0.7% |
| Walked | 8.4% ±4.9 pts | 1.7% |
| Worked from home | 15.6% ±5.4 pts | 19.3% |
| Mean travel time to work | 22.4 min ±2.8 | 27.5 min |
Source: American Community Survey 2020-2024 5-year estimates, U.S. Census Bureau (released January 2026) (Data Profile DP03) · Check it at data.census.gov
How does Census Tract 308 compare with the other tracts in Cobb County?
Among Cobb County's tracts with a reliable estimate, Census Tract 308 ranks as shown below (1 = highest).
| Measure | In Cobb County | In Marietta |
|---|---|---|
| Population | 18th of 186 | 6th of 27 |
| Residents per square mile | 116th of 186 | 19th of 27 |
| Median household income | 158th of 186 | 19th of 27 |
| Per capita income | 137th of 186 | 18th of 27 |
| Median home value | 63rd of 183 | 5th of 26 |
| Median gross rent | 159th of 160 | 26th of 26 |
| Poverty rate | 42nd of 62 | 16th of 18 |
| Bachelor's degree or higher | 105th of 185 | 12th of 27 |
| Median age | 185th of 186 | 27th of 27 |
| Owner-occupied share | 139th of 184 | 13th of 26 |
The tracts next to it on Cobb County's income ladder
| Tract | Rank | Median household income |
|---|---|---|
| Tract 309.11 | 155th | $71,815±$19,757 · within the margin of this tract |
| Tract 305.11 | 156th | $71,777±$13,076 · within the margin of this tract |
| Tract 314.11 | 157th | $70,563±$19,101 · within the margin of this tract |
| Tract 308 | 158th | $70,530±$14,749 |
| Tract 311.16 | 159th | $69,615±$13,997 · within the margin of this tract |
| Tract 303.44 | 160th | $69,419±$24,773 · within the margin of this tract |
| Tract 313.22 | 161st | $69,406±$13,524 · within the margin of this tract |
"Within the margin": the two incomes differ by less than their combined 90% margins, so the survey cannot say which is higher and the ranks between them are not firm.
Source: PlainCities ranks computed from the American Community Survey 2020-2024 5-year estimates, U.S. Census Bureau (released January 2026) · How ranks are computed
How reliable are the figures for Census Tract 308?
1 of the 18 figures for Census Tract 308 on this page carries a coefficient of variation over 40% and is marked with a ring: they come from a small sample, so read them as rough.
A census tract's figures rest on a few hundred sampled households over five years, so its margins are wider than a city's. Two tracts differ only when the gap between them is larger than their combined 90% margin (the square root of the sum of the two squared margins). How to read a margin of error.
Source: American Community Survey 2020-2024 5-year estimates, U.S. Census Bureau (released January 2026): margins of error as published · Check it at data.census.gov
How these figures are made: methodology and release checks · reading a margin of error · every state · corrections