ZIP 78578 · Cameron County
Port Isabel, TX Homeowners Insurance
According to U.S. Treasury FIO 2022 filings, homeowners insurance in ZIP 78578, Port Isabel, Texas averages $1,235/yr.
- 7.0%
- Loss ratio
- #1488 of 1504
- Texas rank
- 80
- Policies
The verdict
ZIP 78578 (Port Isabel, TX) homeowners insurance averages $1,235/yr, 26th percentile nationally, 30% below the U.S. ZIP-code average.
- $1,235
- Avg premium (2022)
- -30%
- vs U.S. ZIP-code average
- -1.2%
- since 2018
- 26th
- national percentile
According to U.S. Treasury Federal Insurance Office data. How we calculate the percentile and national comparison: methodology.
Insurance Livability Score
PlainInsure's own composite of Treasury FIO premium/market data and FEMA National Risk Index hazard data, each dimension percentile-ranked against the full national corpus. Not an official government score, and not a substitute for an actual insurance quote.
Where ZIP 78578's premium sits nationally
Average annual homeowners premium across 25,593 tracked ZIP codes, as of 2022
$1,235 Lower than most lower than 74% of 25,593 ZIP codes
tracked ZIP codes, bucketed by value
Each bar is a $0.25K-wide band; taller bars hold more ZIP codes. The dashed line + filled bar mark this entry. Hover or tap any bar for its full count and share, and where it sits relative to this entry.
Source U.S. Treasury Federal Insurance Office · 2022
Data Snapshot: ZIP 78578 (Port Isabel, TX)
Homeowners in ZIP 78578 (Port Isabel, TX) pay an average of $1,235 per year for insurance as of 2022, according to U.S. Treasury FIO ZIP-level data across approximately 80 reported policies. Nationally, that ranks ZIP 78578 in the 26th percentile, 30% below the U.S. average of $1,776 per year. Compared to the Texas state average of $2,349, this ZIP runs 47% below, ranking #1488 of 1504 tracked ZIPs in Texas by premium. The closest-priced peer within Texas is Laredo (ZIP 78046) at $1,236, essentially matching this ZIP's rate.
At a loss ratio of 7.0%, insurers retained a working margin after claims in this ZIP. About 0.86% of policyholders in this ZIP file a claim annually, and the average claim severity (amount paid per claim) is $9,948.
Across 5 years (2018–2022), premiums in ZIP 78578 have fallen by 1.2%, ranging from $1,219 to $1,259 with a five-year average of $1,237, an annualized rate of -0.3% per year.
Cameron County carries a FEMA National Risk Index score of 97.3 (Relatively High), 97th percentile nationally and #9 of 245 Texas counties - 93% above the state mean of 50.5. Dominant mapped hazard: Hurricane. Companion scores: Social Vulnerability Index 91.7 · Community Resilience 6.3. This is hazard context from FEMA, not a premium formula.
How to read these numbers
The figures on this page come from the U.S. Treasury Federal Insurance Office, which collects homeowners insurance premium and claims data directly from the largest property insurers in the country. Because the data is aggregated at the ZIP-code level and averaged across many policies, it describes the typical cost in an area rather than a quote for any single home. Two houses on the same street can pay very different premiums depending on their age, construction type, roof condition, prior claims, and the specific coverage limits and deductibles the homeowner selects. The loss ratio shows how much of every premium dollar insurers paid back out as claims; a ratio above one means carriers lost money locally, which often precedes rate increases or carrier exits. Rising nonrenewal and claim frequency reveal how stressed the local market has become. Use these figures to gauge the direction and scale of costs in your area, then request quotes from several licensed carriers before buying or renewing a policy. FIO data aggregates voluntary reporting from the 40 largest homeowners insurers, covering roughly 80% of the U.S. market, so figures represent market averages rather than individual policy quotes; your own premium will vary with dwelling value, deductible, coverage limits, construction type, and insurer-specific underwriting. This page is educational research only and is not insurance advice, homeowners should request quotes from multiple licensed carriers or an independent agent before purchasing or renewing coverage.
How ZIP 78578 Compares
Premium History
Average premium in ZIP 78578, 2018–2022
| Year | Avg Premium | YoY Change |
|---|---|---|
| 2018 | $1,250 | - |
| 2019 | $1,224 | -2.1% |
| 2020 | $1,259 | +2.9% |
| 2021 | $1,219 | -3.2% |
| 2022 | $1,235 | +1.3% |
2018-2022 premium path for ZIP 78578
Similar ZIP Codes in Texas
A look at Texas ZIP codes with comparable premium levels.
One of 1,503 ZIP codes with premium data in Texas, 9 are shown here.
Elevated FEMA NRI in Cameron County
County National Risk Index joined to ZIP 78578 via FIPS 48061. Hazard and vulnerability context from FEMA, not a premium driver and not a quote.
Social Vulnerability Index 91.7 · Community Resilience 6.3
County hazard ratings
- Wildfire
- Relatively Low
- Flooding
- Relatively Moderate
- Earthquake
- Very Low
- Hurricane
- Very High
- Tornado
- Relatively Moderate
- Hail
- Relatively High
- Winter weather
- Relatively High
Source: FEMA National Risk Index · state rollup: Texas NRI context · top counties by NRI score.
Cross-state FIO peers for a higher-NRI ZIP (Cameron County)
Two FIO peer sets for ZIP 78578 in Cameron County (NRI 97.3, hazard Hurricane), both outside Texas. Population floor ≥1,000 matches the rate rankings.
Similar average premium
Nearest other-state ZIPs by average homeowners premium ($1,235/yr here).
How to read premiums, nonrenewals, and loss ratios
Explore more insurance data
Source: U.S. Department of the Treasury, Federal Insurance Office (FIO) Homeowners Insurance Data (2018-2022). Premiums are ZIP-level averages and may not reflect individual policy costs
Frequently Asked Questions
How much is homeowners insurance in ZIP 78578? ▼
What affects homeowners insurance costs in Port Isabel, TX? ▼
Is homeowners insurance expensive in ZIP 78578 compared to the national average? ▼
What is the nonrenewal rate in ZIP 78578? ▼
How have premiums trended in ZIP 78578 over 5 years? ▼
How does ZIP 78578 compare to the Texas state average? ▼
What is the FEMA National Risk Index score for ZIP 78578? ▼
What to do with ZIP 78578
This ZIP's premiums run at the 26th national percentile, but a single number is not a quote.
- See how Port Isabel, TX compares to every other ZIP in Texas. Texas overview
- Check the ZIPs ranked highest and lowest nationwide before assuming this one is typical. View rankings
- Look up a different ZIP code to compare rates directly. Search ZIP codes
These figures are Treasury FIO aggregates for this ZIP, not a personal insurance quote.
Every figure on PlainInsure is rendered directly from U.S. Treasury Federal Insurance Office data, no number is typed in by an editor. This page draws directly on U.S. Treasury FIO data, no figure is typed in by an editor. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error.