ZIP Code 42603

42603 is one of Kentucky's ZIP codes, delivering to addresses in Alpha, Clinton County.

City: Alpha
County: Clinton County
State: Kentucky
Prefix: 426xx

Where this code sits

42603 is part of the 426xx range, the group of codes handled by one mail processing centre. It is the only ZIP code delivering to Alpha.

Area codes over the same ground

Postal and telephone geography are drawn separately, so these codes cover the area 42603 delivers to without sharing its boundary.

606 Area code 606

ZIP codes nearest 42603

The ZIP codes whose reference points sit closest to 42603.
ZIP code	Distance	Delivers to
ZIP code 42602	9.2 mi	Albany, KY
ZIP code 42633	13 mi	Monticello, KY
ZIP code 42629	13 mi	Jamestown, KY
ZIP code 38577	14 mi	Pall Mall, TN
ZIP code 38549	16 mi	Byrdstown, TN
ZIP code 42642	19 mi	Russell Springs, KY
ZIP code 42741	20 mi	Glens Fork, KY
ZIP code 42717	21 mi	Burkesville, KY

Straight-line distance between place reference points, not driving distance. Where a place has no Census Gazetteer point, its postal centroid is used instead.

Each point is the reference point for 42603, plotted from its record coordinates.

Reference points and footprint
Not an official NANPA boundary
Not a USPS delivery area

Scope ZIP code 42603. Source GeoNames US postal codes (2026-07 postal dump) and Census 2024 county Gazetteer (2024 Gazetteer). Updated 15 July 2026. A ZIP code is a set of delivery routes, not an area; the point shown is a record coordinate, not a centre.