County ZIP codes · Texas · FIPS 48273

Kleberg County, TX ZIP Codes

Kleberg County, Texas has 5 ZIP codes (Census 2020 ZCTA-county file; GeoNames postal codes, October 2026): 4 residential and 1 for PO boxes or a single organization. 3 of the residential ones lie mainly in Kleberg County and 1 mainly in a neighboring county; 2 cross the county line. Median household income ranges from $60,574 in 78363 (Kingsville) to $100,944 in 78379 (Riviera) (Census Bureau, ACS 2020-2024).

ACS2020-24
Census2020

Where are the ZIP codes of Kleberg County?

The residential ZIP codes of Kleberg County (whole outlines, including the parts in neighboring counties), shaded by median household income in national fifths (ACS 2020-2024).<$54.1k$98.1k+no figure

Source: U.S. Census Bureau, 2020 ZCTA cartographic boundaries; ACS 2020-2024 5-year estimates (B19013).

How different are its ZIP codes?

78363 · $61k78379 · $101k

They carry 4 postal town names: Corpus Christi, Kingsville, Falfurrias, Riviera.

Source: U.S. Census Bureau, ACS 2020-2024 5-year estimates (B19013).

All 4 residential ZIP codes in Kleberg County

3 ZIP codes lie mainly in Kleberg County; 1 more reaches into it from a neighboring county and follows the first table.

Residential ZIP codes mainly in Kleberg County, largest first; "In this county" is the share of the ZIP's land in the county
						In this county
78418	Corpus Christi	29,790	406	$92k	$303k	60%
78363	Kingsville	28,920	190	$61k	$163k	100%
78379	Riviera	1,659	22	$101k	$133k	100%

Partly in Kleberg County

Residential ZIP codes mainly in another county that reach at least 1% into Kleberg County, by their share here
						In this county
78355	Falfurrias	6,772	19	$49k	$82k	4%

Download the 5 ZIP codes as CSV

Source: U.S. Census Bureau, ACS 2020-2024 5-year estimates; county shares by land area (Census 2020 ZCTA-county relationship file).

Which ZIP codes cross the county line?

2 ZIP codes of Kleberg County extend into another county. A ZIP code follows mail routes, not county borders.

Share of each ZIP code's land in Kleberg County and in the neighboring counties
ZIP	In Kleberg	Elsewhere
78418	60%	Nueces County40%
78355	4%	Brooks County85%; Jim Wells County11%

Source: U.S. Census Bureau, 2020 ZCTA-county relationship file (shares of land area).

PO Box and single-organization ZIP codes

ZIP codes in Kleberg County without a residential area (GeoNames postal codes)
ZIP	Postal name
78364	Kingsville

Source: GeoNames postal codes (CC BY 4.0).

Which first three digits do Kleberg County's ZIP codes use?

The first three digits of a ZIP code name the sectional center, the mail processing plant that sorts it. Kleberg County's ZIP codes use 2 prefixes: 783 and 784.

Three-digit prefixes of Kleberg County's ZIP codes, the sectional center for each (USPS labeling list L005, effective October 1, 2026) and how many of the prefix's codes are Kleberg County's
Prefix	Sectional center	Here	All codes
783	Corpus Christi, TX (SCF 783)	4	49
784	Corpus Christi, TX (SCF 783)	1	30

Source: U.S. Postal Service, labeling list L005 (3-digit ZIP Code prefix groups, SCF sortation), effective October 1, 2026.