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County · code 13089

DeKalb CountyGeorgia

DeKalb County is a county in Georgia with its seat in Decatur, formed in 1822.

  • Founded1822
  • County seatDecatur
  • Named forJohann de Kalb
  • Land area268 sq mi + 3.4 sq mi water
  • Population764,382 2020 Census
  • Parcels mapped245,518 checked 14 October 2026
Open the free map Click any parcel in DeKalb County: acreage, parcel id, address and who publishes the map. No sign-in.

Updated

RockdaleFultonClaytonGwinnettHenry Decatur Census outline · seat marked

Where it is

DeKalb on the map of Georgia

Georgia has 159 counties and county equivalents, each with its own records office. Shapes with a page are links.

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Counties of Georgia · DeKalb highlighted

History

Formed in 1822 from Fayette County, Gwinnett County and Henry County

An old deed may name a county that no longer exists, or a boundary that has since moved.

DeKalb County was created in 1822 from parts of Fayette County, Gwinnett County, and Henry County. It was named after Johann de Kalb, and its boundaries shifted several times over the following decades as areas were gained from and lost to neighboring counties. In 1853, DeKalb County lost territory to the creation of Fulton County.

Boundary changes from the Newberry Library, Atlas of Historical County Boundaries; the 5 that matter most are shown first.

  1. 1822
    DeKalb County created Dekalb created from Fayette, Gwinnett, and Henry.
    from Fayettefrom Gwinnettfrom Henry
    · Dawson's Compilation, 121-122
  2. 1826
    Lost territory Dekalb lost to Coweta.
    to Coweta
    · Ga. Laws 1826, pp. 57-59; Dawson's Compilation, 132-133
  3. 1826
    Gained territory Dekalb gained from Newton.
    from Newton
    · Ga. Laws 1826, pp. 62-63; Dawson's Compilation, 134
  4. 1828
    Gained territory Dekalb gained from Gwinnett (lots 307, 308; 6th dist.).
    from Gwinnett
    · Ga. Laws 1828, p. 54; Dawson's Compilation, 138
  5. 1828
    Lost territory Dekalb lost to creation of Campbell (extinct).
    to Campbell
    · Ga. Laws 1828, pp. 56-58; Dawson's Compilation, 139-140
Show all 18 changes (13 more, mostly small adjustments)
  1. 1822
    DeKalb County created Dekalb created from Fayette, Gwinnett, and Henry.
    from Fayettefrom Gwinnettfrom Henry
    · Dawson's Compilation, 121-122
  2. 1823
    Boundary clarified Dekalb boundaries were redefined (no change).
    no change
    · Ga. Laws 1823, p. 56; Dawson's Compilation, 125
  3. 1826
    Lost territory Dekalb lost to Coweta.
    to Coweta
    · Ga. Laws 1826, pp. 57-59; Dawson's Compilation, 132-133
  4. 1826
    Gained territory Dekalb gained from Newton.
    from Newton
    · Ga. Laws 1826, pp. 62-63; Dawson's Compilation, 134
  5. 1828
    Gained territory Dekalb gained from Gwinnett (lots 307, 308; 6th dist.).
    from Gwinnett
    · Ga. Laws 1828, p. 54; Dawson's Compilation, 138
  6. 1828
    Lost territory Dekalb lost to creation of Campbell (extinct).
    to Campbell
    · Ga. Laws 1828, pp. 56-58; Dawson's Compilation, 139-140
  7. 1829
    Gained territory Dekalb gained from Gwinnett (fractional lot 248; 6th dist.).
    from Gwinnett
    · Ga. Laws 1829, p. 30; Dawson's Compilation, 140
  8. 1840
    Lost territory Dekalb lost to Gwinnett to accommodate private individual.
    to Gwinnett
    · Ga. Laws 1840, p. 37
  9. 1841
    Changed Legislation authorized Dekalb to gain from Fayette (lot 16; 13th dist.).
    Fayette
    · Ga. Laws 1841, pp. 62-63
  10. 1850
    Lost territory Dekalb lost small area to Newton to accommodate private individual (lot 200; 16th dist.), no evidence that change took effect.
    to Newton
    · Ga. Laws 1849, pp. 132-133
  11. 1853
    Lost territory Dekalb lost to creation of Fulton.
    to Fulton
    · Ga. Laws 1853-1854, priv. & local, no. 225/pp. 300-302
  12. 1854
    Boundary clarified Boundary between Dekalb and Fulton was redefined (no change).
    with Fultonno change
    · Ga. Laws 1853-1854, priv. & local, no. 233/pp. 311-312
  13. 1856
    Gained territory Dekalb gained small area from Fulton (lot 9; 17th dist.) (later repealed).
    from Fulton
    · Ga. Laws 1855, no. 57/p. 127
  14. 1858
    Gained territory Dekalb gained small area from Henry (lots 252, 253; 12th dist.) to accommodate private individual.
    from Henry
    · Ga. Laws 1858, pub., no. 23/p. 40
  15. 1859
    Lost territory Dekalb lost to Milton (extinct).
    to Milton
    · Ga. Laws 1859, loc. & priv., no. 249/p. 271
  16. 1872
    Gained territory Dekalb gained small area from Henry (lots 228, 229; 12th dist.).
    from Henry
    · Ga. Laws 1872, July adj. sess., loc. & priv., no. 289/p. 408
  17. 1874
    Lost territory Dekalb lost small area to Fulton (lot 9; 17th dist.) when act of 21 February 1856 was partially repealed.
    to Fulton
    · Ga. Laws 1874, no. 329/p. 375
  18. 1875
    Changed Legislation authorized Dekalb to lose small area to Rockdale (lot 256; 16th dist.), but no evidence change took effect.
    Rockdale
    · Ga. Laws 1875, no. 253/p. 272

Land and parcels

What the maps cover in DeKalb

Who publishes each layer, how good it is, and when we last checked.

Official
from the office that keeps the record
Good enough
a reliable statewide or national copy
Fallback
a guide only; check the official record
Missing
nothing public found yet

People and land

DeKalb by the Census

Population
764,382 2020 Census count
Housing units
326,101 2020 Census count
Land area
268 square miles
Water area
3.4 square miles
People per sq mi
2,855 population ÷ land area

Source: US Census Bureau, 2020 Census; US Census Bureau, 2020 Gazetteer Files. Not endorsed or certified by the Census Bureau.

Rules and offices

DeKalb County's official site

We have found the county's site but not its offices yet; start there.

County government

See your own lot on these maps

Open DeKalb County on Parcel Chart's free map and click your parcel. Save it with a free account; the full record of your place (site map, projects, documents) is Pro, in early access.

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Questions

Common questions about DeKalb County

When was DeKalb County founded?
DeKalb County was founded in 1822, formed from Fayette County, Gwinnett County and Henry County, and named after Johann de Kalb.
What is the county seat of DeKalb County?
The county seat of DeKalb County is Decatur.
Is there an online parcel map for DeKalb County?
Yes. A public source publishes a parcel map of 245,518 parcels, rated good enough here. You can click any parcel on it in Parcel Chart's free map, no sign-in needed.
Has DeKalb County's boundary or name changed?
DeKalb County was created in 1822 from Fayette County, Gwinnett County and Henry County. Since then the Atlas of Historical County Boundaries records 15 later changes, most of them small boundary adjustments, chiefly involving Fulton County, Gwinnett County and Henry County.
Is my lot in a flood zone?
We do not have flood maps for DeKalb County yet. Look up the address on FEMA's Flood Map Service Center, which shows the effective flood map for any lot.

Nearby

Counties next door