Which ZIP code in Cameron County has the fastest population growth?

78566 (Los Fresnos), at 44.3%, among 13 ZIP codes with 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.

Fastest-growing ZIP codes in Cameron County, TX

These are the 13 ZIP codes in Cameron County with the fastest population growth, out of 13 with at least 1,000 residents. 78566 (Los Fresnos, 44.3%), 78526 (Brownsville, 22.5%) and 78552 (Harlingen, 11.6%) lead the list. There is no single "best" ZIP code in Cameron County; 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 Cameron County

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	78552	Harlingen	11.6%	42,332	13,567	14,634
4	78597	South Padre Island	4.2%	2,935	1,642	613
5	78520	Brownsville	3.6%	64,740	20,847	22,917
6	78550	Harlingen	1.3%	53,335	19,733	21,652
7	78521	Brownsville	-3.6%	87,380	27,731	31,923
8	78593	Santa Rosa	-7.5%	5,455	1,555	852
9	78559	La Feria	-8.2%	12,169	4,275	5,048
10	78586	San Benito	-10.1%	50,964	15,699	15,753
11	78578	Port Isabel	-14.9%	10,016	4,379	4,061
12	78583	Rio Hondo	-26.6%	5,236	1,952	1,958
13	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; 13 of 16 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 60,813 households, on 85 carrier routes with 65,027 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

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Frequently asked questions

Which ZIP code in Cameron County has the fastest population growth?: 78566 (Los Fresnos), at 44.3%, among 13 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.