Fastest-growing ZIP codes in Brownsville, TX
These are the 6 ZIP codes in Brownsville, TX with the fastest population growth, out of 6 with at least 1,000 residents. 78566 (Los Fresnos, 44.3%), 78526 (Brownsville, 22.5%) and 78520 (Brownsville, 3.6%) lead the list. There is no single "best" ZIP code in Brownsville; the right one depends on who you want to reach, so the same ZIP codes are ranked several ways below.
Fastest-growing ZIP codes in Brownsville
| Rank | ZIP | Mailing city | Population change | Residents | Households | Residential mailboxes |
|---|---|---|---|---|---|---|
| 1 | 78566 | Los Fresnos | 44.3% | 25,110 | 7,241 | 8,016 |
| 2 | 78526 | Brownsville | 22.5% | 60,012 | 17,516 | 18,847 |
| 3 | 78520 | Brownsville | 3.6% | 64,740 | 20,847 | 22,917 |
| 4 | 78521 | Brownsville | -3.6% | 87,380 | 27,731 | 31,923 |
| 5 | 78578 | Port Isabel | -14.9% | 10,016 | 4,379 | 4,061 |
| 6 | 78575 | Olmito | -62.5% | 4,575 | 1,620 | 2,689 |
How we ranked them
Ranked by the change in ACS population estimates between the 2015–2019 and 2020–2024 releases. Both are 5-year averages, and ZIP code areas were redrawn for 2020, so a large change can partly reflect a boundary change. Both periods must have at least 1,000 residents. ZIP codes need at least 1,000 residents to be ranked; 6 of 6 qualify.
Which of these to mail, and why
Growing ZIP codes add households every year, which means new homes, new routes and customers without a go-to provider yet. Check the route map: new subdivisions can appear as new carrier routes.
The top five ZIP codes on this list hold 77,714 households, on 108 carrier routes with 85,764 residential mailboxes. Open any of them on the route map to see each carrier route's own figures before you choose.
Open 78566 on the EDDM route map
More rankings
- Richest ZIP codes in Brownsville
- ZIP codes with the highest home values in Brownsville
- ZIP codes with the highest homeownership in Brownsville
- ZIP codes with the most families with kids in Brownsville
- ZIP codes with the most new movers in Brownsville
- Youngest ZIP codes in Brownsville
- Oldest ZIP codes in Brownsville
- Fastest-growing ZIP codes in Cameron County
- All Brownsville ZIP codes
Businesses that mail these ZIP codes
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EDDM guides
Frequently asked questions
- Which ZIP code in Brownsville has the fastest population growth?
- 78566 (Los Fresnos), at 44.3%, among 6 ZIP codes with at least 1,000 residents.
- How is this ranking calculated?
- Ranked by the change in ACS population estimates between the 2015–2019 and 2020–2024 releases. Both are 5-year averages, and ZIP code areas were redrawn for 2020, so a large change can partly reflect a boundary change. Both periods must have at least 1,000 residents.
- Why are some ZIP codes missing?
- ZIP codes with fewer than 1,000 residents are left out because their survey estimates swing too much to rank, and so are ZIP codes where the Census Bureau did not publish this figure.
This product uses the Census Bureau Data API but is not endorsed or certified by the Census Bureau.