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Columbia County · Georgia Property Tax

Columbia County, GA Property Tax Rate Explained.

What a Columbia County home really costs in property tax: the 2025 millage, Georgia's 40% assessment rule, and the exemptions that lower the bill. Unincorporated Columbia County levies total about 21.05 mills.

Columbia County tax on a $350,000 home, before exemptions
$2,947
About $246/month. Georgia assesses 40% of market value ($140,000 here), and unincorporated Columbia County's 2025 levies total 21.05 mills. Homestead exemptions reduce this; they vary by county and city.
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Property tax in Columbia County, explained.

Columbia County is part of Momentum's Georgia coverage through the Georgia MLS (GAMLS), which we carry statewide. Its 2025 digest rates: county maintenance & operations 4.814 mills, schools 16.234 mills. Inside a city the city's own millage applies instead of some unincorporated levies: Grovetown 6.948. All figures are from the Georgia Department of Revenue's 2025 County Ad Valorem Tax Digest.

County 4.814 verified via The Augusta Press (2025 adoption); school 16.234 matches the DOR digest OCR (lowest school rate in 35 years per the BOE).

Georgia's homestead exemption reduces the assessed value each levy taxes. The statewide base exemption is modest, but counties and cities layer their own - senior, veteran, floating, and school-tax exemptions differ across all nine counties here. File once with the Columbia County Tax Commissioner by April 1 and it renews while you own and occupy the home.

Common questions about Columbia County property tax.

How much is property tax in Columbia County, Georgia?
Georgia taxes 40% of fair market value. Columbia County's 2025 unincorporated levies total about 21.05 mills (county 4.814, school 16.234). On a $350,000 home before exemptions that is about $2,947 a year, an effective rate near 0.84% of the price. Homestead exemptions - which vary by county and city - reduce that; the rates are from the Georgia Department of Revenue's 2025 tax digest.
How does Georgia property tax math work?
Three steps: your county assessor sets fair market value; Georgia assesses 40% of it (O.C.G.A. 48-5-7); each levy applies its millage to that assessed value, at $1 per mill per $1,000. A $350,000 home is assessed at $140,000, so one mill costs $140 a year.
When is the homestead exemption deadline in Columbia County?
April 1. File once with the Columbia County Tax Commissioner and it renews automatically while you own and occupy the home. Exemption amounts differ by county, city, age, and veteran status, so ask the county which local exemptions apply to you.

Buying along the coast? Compare the other southeast Georgia counties, or see every Golden Isles neighborhood we cover.

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