County · code 18033
DeKalb CountyIndiana
DeKalb County is in Indiana with its county seat at Auburn. The county was created in 1835 from parts of Allen and Lagrange Counties and fully organized two years later.
- Founded1835
- County seatAuburn
- Named forJohann de Kalb
- Land area363 sq mi + 1 sq mi water
- Population43,265 2020 Census
- Parcels mapped34,022 checked 15 October 2026
Where it is
DeKalb on the map of Indiana
Indiana has 92 counties and county equivalents, each with its own records office. Shapes with a page are links.
History
Formed in 1835 from Allen County and Lagrange County
An old deed may name a county that no longer exists, or a boundary that has since moved.
DeKalb County was created on February 7, 1835, from portions of Allen County and Lagrange County, though it was not initially fully organized. The county was fully organized and detached from Allen and Lagrange on May 1, 1837. The county was named after Johann de Kalb.
- 1835DeKalb County created De Kalb created from Non-County Area 8 attached to Allen and Non-County Area 16 attached to Lagrange; De Kalb not fully organized, parts attached to Allen and Lagrange for administrative and judicial purposes. · Ind. Acts 1834, 19th sess., gen., ch. 25, sec. 4/p. 44
- 1837
Land and parcels
What the maps cover in DeKalb
Who publishes each layer, how good it is, and when we last checked.
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Parcels Good enough
Lot lines and tax-map numbers for 34,022 parcels from Indiana Geographic Information Office (IndianaMap). Drawn for tax purposes: usually within a few feet of a survey, but not a survey.
edited 6 October 2026 · checked 15 October 2026 -
Address points Official
One point per address, 21,955 in all from Indiana Geographic Information Office (IGIO).
edited 8 March 2026 · checked 13 October 2026 -
Buildings Reference
Roof outlines traced from aerial imagery from FEMA Response Geospatial Office with Oak Ridge National Laboratory (ORNL). Good for seeing what is on a lot; not accurate enough to set a fence from.
checked 18 October 2026
- 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
Source: US Census Bureau, 2020 Census; US Census Bureau, 2020 Gazetteer Files. Not endorsed or certified by the Census Bureau.
Rules and offices
Who to ask before you build, dig or sell
Official county pages only. We link to them; we do not copy them, because they change.
Inside a city or town, permits usually come from that city rather than the county.
Zoning and code
County government
- County government
The official website of DeKalb County.
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.
Questions
Common questions about DeKalb County
- When was DeKalb County founded?
- DeKalb County was founded in 1835, formed from Allen County and Lagrange County, and named after Johann de Kalb.
- What is the county seat of DeKalb County?
- The county seat of DeKalb County is Auburn.
- Is there an online parcel map for DeKalb County?
- Yes. Indiana Geographic Information Office (IndianaMap) publishes a parcel map of 34,022 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 1835 from Allen County and Lagrange County. Since then the Atlas of Historical County Boundaries records 1 later change, chiefly involving Allen County and Lagrange 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