County ZIP codes · Texas · FIPS 48183

Gregg County, TX ZIP Codes

Gregg County, Texas has 16 ZIP codes (Census 2020 ZCTA-county file; GeoNames postal codes, October 2026): 10 residential and 6 for PO boxes or a single organization. 7 of the residential ones lie mainly in Gregg County and 3 mainly in a neighboring county; 9 cross the county line. Median household income ranges from $52,330 in 75602 (Longview) to $102,146 in 75693 (White Oak) (Census Bureau, ACS 2020-2024).

ACS2020-24
Census2020

Where are the ZIP codes of Gregg County?

The residential ZIP codes of Gregg 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?

75602 · $52k 75693 · $102k

The middle half of its ranked ZIP codes (1,000+ people living in households) report median household incomes between $65,212 and $70,096.

They carry 6 postal town names: Longview, Kilgore, Gladewater, Gilmer, White Oak, Easton.

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

All 10 residential ZIP codes in Gregg County

7 ZIP codes lie mainly in Gregg County; 3 more reach into it from a neighboring county and follow the first table.

Residential ZIP codes mainly in Gregg County, largest first; "In this county" is the share of the ZIP's land in the county
						In this county
75605	Longview	35,417	441	$73k	$252k	58%
75604	Longview	31,924	723	$68k	$201k	98%
75662	Kilgore	25,034	197	$70k	$174k	53%
75601	Longview	15,780	1,730	$66k	$211k	78%
75647	Gladewater	13,299	150	$66k	$168k	43%
75603	Longview	6,061	114	$65k	$186k	89%
75693	White Oak	5,935	577	$102k	$222k	100%

Partly in Gregg County

Residential ZIP codes mainly in another county that reach at least 1% into Gregg County, by their share here
						In this county
75641	Easton	83	49	–	$166k	21%
75602	Longview	20,671	398	$52k	$140k	19%
75645	Gilmer	10,400	72	$57k	$167k	2%

Download the 16 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?

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

Share of each ZIP code's land in Gregg County and in the neighboring counties
ZIP	In Gregg	Elsewhere
75605	58%	Harrison County 41%
75604	98%	Upshur County 2%
75662	53%	Rusk County 40%; Smith County 8%
75602	19%	Harrison County 81%
75601	78%	Harrison County 22%
75647	43%	Smith County 32%; Upshur County 25%
75645	2%	Upshur County 98%
75603	89%	Rusk County 11%
75641	21%	Rusk County 79%

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

PO Box and single-organization ZIP codes

ZIP codes in Gregg County without a residential area (GeoNames postal codes)
ZIP	Postal name
75606	Longview
75607	Longview
75608	Longview
75615	Longview
75660	Judson
75663	Kilgore

Source: GeoNames postal codes (CC BY 4.0).

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

The first three digits of a ZIP code name the sectional center, the mail processing plant that sorts it. Every ZIP code of Gregg County starts with 756.

Three-digit prefixes of Gregg 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 Gregg County's
Prefix	Sectional center	Here	All codes
756	Shreveport, LA (SCF 710)	16	57

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