Every taxing unit on a Port Mansfield bill
Your bill adds up one line per taxing unit. These are the units on the 2025 appraisal roll for homes inside Port Mansfield, with San Perlita ISD as the school district. Rates are dollars per $100 of taxable value.
| Taxing unit | M&O 2025 | I&S 2025 | 2025 rateadopted | Sources |
|---|---|---|---|---|
| Willacy CountyCounty | 0.646600 | 0.012400 | 0.659000 | Willacy CAD 2025 rates, Willacy CAD roll record, Willacy CAD roll record (Port Mansfield) |
| Willacy County Road & BridgeCounty road and bridge | 0.135600 | 0.000000 | 0.135600 | Willacy CAD 2025 rates, Willacy CAD roll record, Willacy CAD roll record (Port Mansfield) |
| Willacy County Hospital DistrictHospital district | 0.023640 | 0.000000 | 0.023640 | Willacy CAD 2025 rates, Willacy CAD roll record, Willacy CAD roll record (Port Mansfield) |
| South Texas ISD (magnet district)School district (countywide) | 0.049200 | 0.000000 | 0.049200 | Willacy CAD 2025 rates, Willacy CAD roll record, Willacy CAD roll record (Port Mansfield) |
| Willacy County Emergency Service DistrictEmergency services district | 0.069502 | 0.000000 | 0.069502 | Willacy CAD 2025 rates, Willacy CAD roll record, Willacy CAD roll record (Port Mansfield) |
| Willacy County Navigation DistrictNavigation district | 0.083000 | 0.000000 | 0.083000 | Willacy CAD 2025 rates, Willacy CAD roll record, Willacy CAD roll record (Port Mansfield) |
| Port Mansfield Utility DistrictUtility district | 0.061300 | 0.000000 | 0.061300 | Willacy CAD 2025 rates, Willacy CAD roll record (Port Mansfield) |
| San Perlita ISDSchool district | 0.717200 | 0.410000 | 1.127200 | Willacy CAD 2025 rates, Willacy CAD roll record (Port Mansfield) |
| Combined (San Perlita ISD) | 2.208442 |
The Comptroller's 2025 rows for Willacy County units are shifted by one line, so the Willacy CAD rate sheet and roll records are used here.
What makes up the Port Mansfield rate
San Perlita ISD is the biggest line on a Port Mansfield bill: 1.1272 of the 2.2084 per $100, or 51% of the 2025 total. The countywide units (Willacy County, Willacy County Road & Bridge, Willacy County Hospital District and South Texas ISD (magnet district)) add 0.8674.
Port Mansfield has no city tax because it is not incorporated.
Units that tax this part of the county: Willacy County Emergency Service District (0.069502): Raymondville and Port Mansfield samples; Willacy County Navigation District (0.0830): Raymondville and Port Mansfield samples; Port Mansfield Utility District (0.0613): Port Mansfield.
At 2025 rates, Port Mansfield's combined 2.2084 is the 5th lowest of the 20 Valley cities on this site.
Which school district?
The 2020 Census places all of the homes in Port Mansfield in San Perlita ISD, so the table above uses it. Your district depends on your exact address. Look it up on the Willacy County Appraisal District property search. The share comes from 2020 Census housing counts within current boundaries, and new streets at the edges can differ.
The 2020 Census counted 412 housing units in Port Mansfield.
Units that tax only some homes
No other taxing units showed up on the sampled Port Mansfield roll record (one record was checked), so a lot elsewhere in Port Mansfield may carry a unit not listed here. A public improvement district (PID) in a newer subdivision bills an assessment, not a tax rate; the title company can tell you if a lot has one.
Estimate your Port Mansfield property tax
Annual tax only. Pick your school district, enter the appraised value from your notice, and choose your exemptions.
The percentage is each district's share of the city's homes (2020 Census). Your exact district depends on your address.
Estimated property tax
$5,045 a year
Estimated 2025 property tax for Port Mansfield, $300,000 taxable value before exemptions, combined rate 2.208442 per $100.
| Taxing unit | Rate per $100 | Taxable value | Tax |
|---|---|---|---|
| Willacy County | 0.659000 | $300,000 | $1,977 |
| Willacy County Road & Bridge | 0.135600 | $300,000 | $407 |
| Willacy County Hospital District | 0.023640 | $300,000 | $71 |
| South Texas ISD (magnet district) | 0.049200 | $295,000 | $145 |
| Willacy County Emergency Service District | 0.069502 | $300,000 | $209 |
| Willacy County Navigation District | 0.083000 | $300,000 | $249 |
| Port Mansfield Utility District | 0.061300 | $300,000 | $184 |
| San Perlita ISD | 1.127200 | $160,000 | $1,804 |
| Total (estimate) | 2.208442 | $5,045 |
Estimate. Local-option exemptions and the 65+ school tax ceiling can lower it; your tax office has your exact bill.
What a Port Mansfield home pays at $200,000, $300,000 and $400,000
| Appraised value | No exemptions | Homestead | Homestead, 65 or older |
|---|---|---|---|
| $200,000 | $4,417 | $2,836 | $2,160 |
| $300,000 | $6,625 | $5,045 | $4,368 |
| $400,000 | $8,834 | $7,253 | $6,577 |
What the exemptions are worth in Port Mansfield
| Exemption | Saves a year | Tax left |
|---|---|---|
| Homestead ($140,000 off San Perlita ISD, $5,000 off South Texas ISD) | $1,581 | $5,045 |
| Add 65 or older, or disabled ($60,000 more off San Perlita ISD) | $676 | $4,368 |
| Add a veteran rating of 70% or more ($12,000 off every unit) | $265 | $4,780 |
| Veteran with a 100% rating or individual unemployability | $5,045 | $0 |
Rules and forms: how each exemption works, the homestead guide and the disabled veteran guide.
Protest deadline
Who sends the bill, and when it is due
The Willacy County Tax Assessor-Collector, (956) 689-3621, collects for Willacy County, Willacy County Road & Bridge, Willacy County Hospital District, South Texas ISD (magnet district), Willacy County Emergency Service District, Willacy County Navigation District, Port Mansfield Utility District and San Perlita ISD. Online: co.willacy.tx.us.
2026 bills go out in October and November 2026 and are on time if paid by Monday, Feb. 1, 2027, because Jan. 31 falls on a Sunday (Tax Code 31.02, 1.06). Penalties and installment plans.
No city tax in Port Mansfield
Port Mansfield is not an incorporated city, so there is no city tax. The Port Mansfield Utility District taxes property there instead (2025 rate 0.0613 per $100).
Nearby cities
Questions
How much are property taxes on a $300,000 house in Port Mansfield?
About $6,625 a year with no exemptions, $5,045 with a homestead exemption and $4,368 at 65 or older (2025 rates, San Perlita ISD).
What is the property tax rate in Port Mansfield, TX?
2.2084 per $100 (2.21%) for most homes in 2025: 8 taxing units.
When and where do I pay Port Mansfield property taxes?
The Willacy County Tax Assessor-Collector, (956) 689-3621, collects for Willacy County, Willacy County Road & Bridge, Willacy County Hospital District, South Texas ISD (magnet district), Willacy County Emergency Service District, Willacy County Navigation District, Port Mansfield Utility District and San Perlita ISD. 2026 bills are on time if paid by Monday, Feb. 1, 2027, because Jan. 31 is a Sunday.
Next steps
- Living in Port Mansfield: the Port Mansfield community guide.
- Countywide view: Willacy County property tax rates, and all 20 Valley cities compared.
- Mortgage and affordability math: calculators.
From Amy
Protesting your home's value? I can pull recent sales of comparable homes near yours from the MLS for your hearing. I help with single-family homes only, not farms, ranches, duplexes, multifamily or commercial property, and I do not file protests for you. Book a call. I work in English and Spanish.
Sources and method
Units: one Willacy County Appraisal District 2025 roll record for a Port Mansfield home (sampled Oct 14, 2026). Rates: checked Oct 16, 2026 against the sources below. Full method and data file.