ZIP Code 13621

13621 is one of New York's ZIP codes, delivering to addresses in Chase Mills, St. Lawrence County.

City: Chase Mills
County: St. Lawrence County
State: New York
Prefix: 136xx

Where this code sits

13621 is part of the 136xx range, the group of codes handled by one mail processing centre. It is the only ZIP code delivering to Chase Mills.

Area codes over the same ground

Postal and telephone geography are drawn separately, so these codes cover the area 13621 delivers to without sharing its boundary.

ZIP codes nearest 13621

The ZIP codes whose reference points sit closest to 13621.
ZIP code	Distance	Delivers to
ZIP code 13678	5.3 mi	Raymondville, NY
ZIP code 13667	5.9 mi	Norfolk, NY
ZIP code 13694	6.5 mi	Waddington, NY
ZIP code 13660	7.6 mi	Madrid, NY
ZIP code 13668	9.0 mi	Norwood, NY
ZIP code 13662	10 mi	Massena, NY
ZIP code 13696	14 mi	West Stockholm, NY
ZIP code 13658	14 mi	Lisbon, NY

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 13621, plotted from its record coordinates.

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

Scope ZIP code 13621. 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.