Rock Island, Colorado County, Texas Property Taxes
Property Taxes in Rock Island, Texas
Median Rock Island, Texas effective property tax rate: 0.83%, significantly lower than the national median of 1.02%, and lower than the Texas state median of 1.48%.
Median Rock Island, Texas home value: $79,270
Median annual Rock Island, Texas tax bill: $674, lower than the national median property tax bill of $2,400.
How are property taxes in Colorado calculated?
Property taxes in Rock Island, Texas 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 Rock Island's property tax system, exemptions, and reduction opportunities can lead to significant savings. Regardless of where you live in Rock Island, knowing local tax details benefits homeowners and investors.
Last Updated April 13, 2026
Rock Island, Colorado County, Texas Property Tax Bill Calculator
$100,000
$1,500,000
$3,000,000
Median Effective Tax Rate
0.83%
Estimate Property Tax Bill
$658
$611
How Does the Rock Island Property Tax Calculator Work?
Use this Rock Island property tax calculator to estimate your annual property tax bill. Enter your property's assessed value and our calculator applies Rock Island's median effective tax rate of 0.83% — based on actual property records in Colorado 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 Rock Island'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 Rock Island: rates range from 0.83% in 77470 to 0.83% in 77470, primarily due to differences in school district levies and local assessment districts.
For a more precise estimate, scroll down to explore ZIP code-level tax rate trends across Rock Island.
About Rock Island Property Taxes
About Property Taxes in Rock Island, Colorado, Texas
Rock Island’s median effective property tax rate of 0.83% is lower than the Texas state median of 1.48% and lower than the national median of 1.02%. This rate reflects the Colorado County base levy combined with local school district levies and Municipal Utility Districts (MUDs) that vary by subdivision throughout the city.
Property tax rates are not uniform across Rock Island. Homeowners in the 77470 ZIP code carry a median effective rate of 0.83%, while those in the same ZIP code pay 0.83%. This spread reflects how school district boundaries and local assessment districts are drawn across Colorado County. Understanding which part of Rock Island you live in can make a meaningful difference to your annual tax bill.
Rock Island homeowners who believe their assessed value is too high can file a formal appeal with the local Appraisal District before the May 15, 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 Rock Island, Colorado County, Texas
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 Rock Island's effective property tax rate to other cities in Texas and the median property tax rates in Texas 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 Rock Island Tax Rate
0.83%
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 Colorado County Tax Rate
1.21%
Median Effective Texas Tax Rate
1.48%
Median Effective United States Tax Rate
1.02%
Property Tax Rates Across Rock Island, Colorado County, Texas
| Zip | 10th Percentile | 25th Percentile | Median Tax Rate | 75th Percentile | 90th Percentile |
|---|---|---|---|---|---|
| 77470 | 0.51% | 0.67% | 0.83% | 1.10% | 1.25% |
Source: Ownwell
Property Tax Assessment Values Across Rock Island, Colorado County, Texas
When examining property taxes in Rock Island, Texas, 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. The Colorado County appraisal district 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 are sent in the spring each year and typically reach your mailbox by the middle of the month. 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.
For example, the median home price in Rock Island is $79,270, with tax bills ranging significantly across the county. ZIP code 77470 has the highest median home price at $79,270.
Property Tax Assessment Values Across Rock Island, Colorado County, Texas
Source: Ownwell
$47,640
$200,173
$352,705
Median Rock Island Market Value
$79,270
Median Colorado County Market Value
$149,715
Median Texas Market Value
$258,851
Median United States Market Value
$235,294
Property Tax Assessment Values Across Rock Island, Colorado County, Texas
| Zip | 10th Percentile | 25th Percentile | Median Home Price | 75th Percentile | 90th Percentile |
|---|---|---|---|---|---|
| 77470 | $24,264 | $46,530 | $79,270 | $142,840 | $245,974 |
Source: Ownwell
Property Tax Bills Across Rock Island, Colorado County, Texas
Property tax bills in Rock Island are calculated by applying the local tax rate to a home’s assessed value, which is based on the market value of the property. For homeowners, that means the bill depends on both how much the home is worth and how local taxing authorities set their rates. In Colorado County, the median home price is $79,270, so changes in assessment can have a meaningful impact on what a homeowner owes.
The typical property tax bill in this area is $674, which sits below the national median property tax bill of $2,400 and below the national median property tax rate of 1.02%. Bills can vary widely: the 25th percentile is $331, while the 75th percentile is $1,201, and the 90th percentile reaches $2,428. For homeowners, that means property taxes can range from manageable to a significant annual expense, depending on the assessed value and local tax rates.
Median Rock Island Tax Bill
$674
Median Colorado County Tax Bill
$1,717
Median Texas Tax Bill
$3,441
Median United States Tax Bill
$2,400
Property Tax Bills Across Rock Island, Colorado County, Texas
| Zip | 10th Percentile | 25th Percentile | Median Tax Bill | 75th Percentile | 90th Percentile |
|---|---|---|---|---|---|
| 77470 | $142 | $331 | $674 | $1,201 | $2,428 |
Source: Ownwell
Don't miss the deadline to protest!
Dates | |
|---|---|
| Appeal Deadline | May 29 |
| Tax Bill | |
| Issued | October 1 |
| Due Date #1 | November 30 |
| Due Date #2 | June 30 |
Links | |
|---|---|
| Colorado Appraisal District | |
| Website | esearch.coloradocad.org |