Marietta, Cobb County, Georgia Property Taxes
Property Taxes in Marietta, Georgia
Median Marietta, Georgia effective property tax rate: 0.94%, significantly lower than the national median of 1.02%, and lower than the Georgia state median of 1.00%.
Median Marietta, Georgia home value: $428,540
Median annual Marietta, Georgia tax bill: $3,115, $715 higher than the national median property tax bill of $2,400.
How are property taxes in Cobb calculated?
Property taxes in Marietta, Georgia are calculated based on the tax assessed value, which is often lower than the actual market value due to property tax exemptions such as the homestead or senior exemption.
Understanding Marietta's property tax system, exemptions, and reduction opportunities can lead to significant savings. Regardless of where you live in Marietta, knowing local tax details benefits homeowners and investors.
Last Updated April 13, 2026
Marietta, Cobb County, Georgia Property Tax Bill Calculator
$100,000
$1,500,000
$3,000,000
Median Effective Tax Rate
0.94%
Estimate Property Tax Bill
$4,028
$3,738
$774
Average Annual Tax Savings
How Does the Marietta Property Tax Calculator Work?
Use this Marietta property tax calculator to estimate your annual tax bill. Enter your property's assessed value and our calculator applies Marietta's median effective tax rate of 0.94% — based on actual property records in Cobb County — to generate your estimate.
Enter your property's estimated assessed value — the figure the local appraisal district uses to calculate your bill, which reflects any exemptions you hold and is typically lower than your home's market value. Our calculator applies Marietta's median effective rate across all local levies, providing a more accurate estimate than applying a single county millage rate.
Your bill may vary by ZIP code within Marietta: rates range from $1,936 in 30060 to $4,468 in 30068, primarily due to differences in school district levies and local assessment districts.
If your estimate is higher than expected, Ownwell can appeal your Marietta assessment — you only pay if we save you money.
About Marietta Property Taxes
About Property Taxes in Marietta, Cobb, Georgia
Marietta's median effective property tax rate of 0.94% is lower than the Georgia state median of 1.00% and lower than the national median of 1.02%. This rate reflects the Cobb County base levy combined with local school district levies and Community Improvement Districts that vary by subdivision throughout the city.
Property tax rates are not uniform across Marietta. Homeowners in the 30068 ZIP code carry a median effective rate of 0.99%, while those in 30060 pay 0.41%. This spread — 0.58 percentage points across the same city — reflects how school district boundaries and local assessment districts are drawn across Cobb County. Understanding which part of Marietta you live in can make a meaningful difference to your annual tax bill.
Marietta homeowners who believe their assessed value is too high can file a formal appeal with the local Assessor's Office before the June 22, 2026 deadline each year.
If your estimated bill above seems higher than expected, Ownwell can review your assessment and protest on your behalf. You only pay if we save you money.
Property Tax Rates Across Marietta, Cobb County, Georgia
As noted earlier, local government entities set tax rates, which can vary widely within a state.
Why? Because annually, each county estimates its required budget to provide services and divides that by the total value of all taxable property within its jurisdiction. This calculation results in the property tax rate.
While there are votes and laws involved in setting tax rates and budgets, in a nutshell, this is the annual process.
Below, you can compare Marietta's effective property tax rate to other cities in Georgia and the median property tax rates in Georgia and the U.S.
Our median effective property tax rate (tax bill ÷ assessor's market value) accounts for exemptions and deductions, making it more accurate than the general median tax rate, which is the midpoint of statutory rates before adjustments.
Median Effective Marietta Tax Rate
0.94%
Our median effective property tax rate (tax bill ÷ assessor's market value) accounts for exemptions and deductions, making it more accurate than the general median tax rate, which is the midpoint of statutory rates before adjustments.
Median Effective Cobb County Tax Rate
0.98%
Median Effective Georgia Tax Rate
1.00%
Median Effective United States Tax Rate
1.02%
Property Tax Rates Across Marietta, Cobb County, Georgia
| Zip | 10th Percentile | 25th Percentile | Median Tax Rate | 75th Percentile | 90th Percentile |
|---|---|---|---|---|---|
| 30008 | 0.19% | 0.34% | 0.95% | 1.21% | 1.21% |
| 30060 | 0.16% | 0.23% | 0.41% | 1.21% | 1.21% |
| 30062 | 0.20% | 0.24% | 0.96% | 1.09% | 1.21% |
| 30064 | 0.14% | 0.22% | 0.34% | 1.04% | 1.21% |
| 30066 | 0.21% | 0.27% | 0.97% | 1.21% | 1.21% |
| 30067 | 0.23% | 0.32% | 0.99% | 1.21% | 1.21% |
| 30068 | 0.22% | 0.27% | 0.99% | 1.10% | 1.21% |
| 30314 | N/A | N/A | N/A | N/A | N/A |
Source: Ownwell
$774
Average Annual Tax Savings
Save on Your Property Taxes and More With Ownwell
Property Tax Assessment Values Across Marietta, Cobb County, Georgia
When examining property taxes in Marietta, Georgia, understanding the distinction between market value and assessed value is crucial.
The market value is what a willing buyer would pay to a willing seller in an open and competitive market, often influenced by location, property condition, and economic market trends. Cobb County estimates the market value for tax purposes.
The assessed value is the market value minus any applicable exemptions or limits determined by local laws and offerings. The tax assessed value is the figure used to calculate your property taxes or the amount multiplied by your tax rate to get your tax bill.
Assessment notices:
In Cobb County, assessment notices are sent in May each year. They'll typically reach your mailbox by the middle of May.
Each property owner receives an assessment notice that contains both the market value and assessed value, along with an estimate of your property tax bill. By providing insights into how assessed and market values are determined, this section helps property owners navigate their tax responsibilities and understand the valuation processes affecting their property taxes in Marietta.
For example, the median home price in Marietta is $428,540, with tax bills ranging significantly across the county. 30068 has the highest median home price at $559,930.
Property Tax Assessment Values Across Marietta, Cobb County, Georgia
Source: Ownwell
$207,520
$406,970
$606,420
Median Marietta Market Value
$428,540
Median Cobb County Market Value
$401,460
Median Georgia Market Value
$280,310
Median United States Market Value
$235,294
Property Tax Assessment Values Across Marietta, Cobb County, Georgia
| Zip | 10th Percentile | 25th Percentile | Median Home Price | 75th Percentile | 90th Percentile |
|---|---|---|---|---|---|
| 30008 | $194,035 | $256,152 | $316,750 | $374,280 | $432,047 |
| 30060 | $212,848 | $259,100 | $321,000 | $409,330 | $536,838 |
| 30062 | $333,790 | $399,240 | $485,340 | $619,950 | $826,070 |
| 30064 | $286,587 | $356,158 | $458,485 | $596,230 | $767,837 |
| 30066 | $298,052 | $340,660 | $403,670 | $536,840 | $723,196 |
| 30067 | $217,770 | $263,595 | $397,610 | $621,565 | $923,521 |
| 30068 | $344,167 | $439,405 | $559,930 | $715,210 | $924,565 |
| 30314 | N/A | N/A | N/A | N/A | N/A |
Source: Ownwell
$774
Average Annual Tax Savings
Save on Your Property Taxes and More With Ownwell
Property Tax Bills Across Marietta, Cobb County, Georgia
Property tax bills in Marietta are based on the assessed value of a home, which is then multiplied by the local tax rate. For homeowners in Cobb County, that means the market value of the property plays a major role in determining how much is owed each year. With a median home price of $428,540, bills can vary widely depending on location and assessment.
In Marietta, the 25th percentile tax bill is $1,149, while the 75th percentile is $4,918 and the 90th percentile is $7,244. The highest median tax bill is $4,468 in zip code 30068, compared with $1,936 in zip code 30060. Compared with the national median property tax rate of 1.02% and national median property tax bill of $2,400, many homeowners may be paying more than expected.
Ownwell helps homeowners lower property tax bills by identifying opportunities to appeal overassessments and secure exemptions, which can lead to meaningful savings.
Median Marietta Tax Bill
$3,115
Median Cobb County Tax Bill
$3,337
Median Georgia Tax Bill
$2,476
Median United States Tax Bill
$2,400
Property Tax Bills Across Marietta, Cobb County, Georgia
| Zip | 10th Percentile | 25th Percentile | Median Tax Bill | 75th Percentile | 90th Percentile |
|---|---|---|---|---|---|
| 30008 | $533 | $900 | $2,633 | $3,678 | $4,421 |
| 30060 | $498 | $865 | $1,936 | $3,208 | $4,064 |
| 30062 | $821 | $1,204 | $3,922 | $5,736 | $8,241 |
| 30064 | $609 | $953 | $2,083 | $4,450 | $6,457 |
| 30066 | $749 | $1,271 | $3,597 | $4,892 | $7,082 |
| 30067 | $726 | $1,380 | $2,952 | $5,000 | $8,401 |
| 30068 | $1,061 | $1,612 | $4,468 | $6,682 | $9,188 |
| 30314 | N/A | N/A | N/A | N/A | N/A |
Source: Ownwell
$774
Average Annual Tax Savings
Save on Your Property Taxes and More With Ownwell
Don't miss the deadline to appeal!
Dates | |
|---|---|
| Appeal Deadline | June 22 |
| Tax Bill | |
| Issued | September 1 |
| Due Date #1 | October 15 |
Links | |
|---|---|
| Cobb Assessor's Office | |
| Phone | (770) 528-3100 |
| Website | qpublic.schneidercorp.com |
| Stephen.White@cobbcounty.org | |