San Isidro, Starr County, Texas Property Taxes
Property Taxes in San Isidro, Texas
Median San Isidro, Texas effective property tax rate: 1.26%, significantly lower than the national median of 1.02%, and lower than the Texas state median of 1.48%.
Median San Isidro, Texas home value: $57,910
Median annual San Isidro, Texas tax bill: $518, lower than the national median property tax bill of $2,400.
How are property taxes in Starr calculated?
Property taxes in San Isidro, 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 San Isidro's property tax system, exemptions, and reduction opportunities can lead to significant savings. Regardless of where you live in San Isidro, knowing local tax details benefits homeowners and investors.
Last Updated April 13, 2026
San Isidro, Starr County, Texas Property Tax Bill Calculator
$100,000
$1,500,000
$3,000,000
Median Effective Tax Rate
1.26%
Estimate Property Tax Bill
$730
$677
How Does the San Isidro Property Tax Calculator Work?
Use this San Isidro property tax calculator to estimate your annual property tax bill. Enter your property's assessed value and our calculator applies San Isidro's median effective tax rate of 1.26% — based on actual property records in Starr 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 San Isidro'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 San Isidro: rates range from 1.26% in 78588 to 1.26% in 78588, 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 San Isidro.
About San Isidro Property Taxes
About Property Taxes in San Isidro, Starr, Texas
San Isidro’s median effective property tax rate of 1.26% is lower than the Texas state median of 1.48% and higher than the national median of 1.02%. This rate reflects the Starr 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 San Isidro. Homeowners in ZIP code 78588 carry a median effective rate of 1.26%, while the lowest rate is also 1.26%. That means there is no spread across the city in the available data, but local school district boundaries and assessment districts can still shape what homeowners owe.
San Isidro 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 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 San Isidro, Starr 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 San Isidro'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 San Isidro Tax Rate
1.26%
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 Starr County Tax Rate
1.98%
Median Effective Texas Tax Rate
1.48%
Median Effective United States Tax Rate
1.02%
Property Tax Rates Across San Isidro, Starr County, Texas
| Zip | 10th Percentile | 25th Percentile | Median Tax Rate | 75th Percentile | 90th Percentile |
|---|---|---|---|---|---|
| 78588 | 0.46% | 0.80% | 1.26% | 1.63% | 1.99% |
Source: Ownwell
Property Tax Assessment Values Across San Isidro, Starr County, Texas
When examining property taxes in San Isidro, 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 Starr 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:
In Starr County, assessment notices are sent in April each year. They'll typically reach your mailbox by the middle of April.
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 San Isidro is $57,910, with tax bills ranging significantly across the county. ZIP code 78588 has the highest median home price at $57,910.
Property Tax Assessment Values Across San Isidro, Starr County, Texas
Source: Ownwell
$36,890
$74,803
$112,715
Median San Isidro Market Value
$57,910
Median Starr County Market Value
$62,725
Median Texas Market Value
$258,851
Median United States Market Value
$235,294
Property Tax Assessment Values Across San Isidro, Starr County, Texas
| Zip | 10th Percentile | 25th Percentile | Median Home Price | 75th Percentile | 90th Percentile |
|---|---|---|---|---|---|
| 78588 | $18,476 | $34,080 | $57,910 | $115,560 | $174,910 |
Source: Ownwell
Property Tax Bills Across San Isidro, Starr County, Texas
San Isidro property tax bills are calculated by applying the local tax rate to a home’s assessed value, which is based on the market value of the property. Local taxing authorities consider factors such as the home’s location, size, and characteristics when determining that value. For a home with a median value of $57,910, the resulting tax bill can vary widely depending on the assessment and the rates set by local governments.
Homeowners in San Isidro may see bills that differ from one property to another, even within the same area. The 25th percentile tax bill is $267, while the 75th percentile tax bill is $1,358 and the 90th percentile tax bill is $1,961. The median tax bill is $518, which is well below the national median property tax bill of $2,400 and reflects the lower home values in the area. These taxes help fund local services, but they also add to the annual cost of owning a home.
Median San Isidro Tax Bill
$518
Median Starr County Tax Bill
$1,162
Median Texas Tax Bill
$3,441
Median United States Tax Bill
$2,400
Property Tax Bills Across San Isidro, Starr County, Texas
| Zip | 10th Percentile | 25th Percentile | Median Tax Bill | 75th Percentile | 90th Percentile |
|---|---|---|---|---|---|
| 78588 | $150 | $267 | $518 | $1,358 | $1,961 |
Source: Ownwell
Don't miss the deadline to protest!
Dates | |
|---|---|
| Appeal Deadline | May 15 |
| Tax Bill | |
| Issued | October 1 |
| Due Date #1 | November 30 |
| Due Date #2 | June 30 |
Links | |
|---|---|
| Starr Appraisal District | |
| Website | esearch.starrcad.org |