ZIP Code 51637

51637 is one of Iowa's ZIP codes, delivering to addresses in College Springs, Page County.

City: College Springs
County: Page County
State: Iowa
Prefix: 516xx

Where this code sits

51637 is part of the 516xx range, the group of codes handled by one mail processing centre. It is the only ZIP code delivering to College Springs.

College Springs Iowa ZIP codes →

Area codes over the same ground

Postal and telephone geography are drawn separately, so these codes cover the area 51637 delivers to without sharing its boundary.

712 Area code 712

ZIP codes nearest 51637

The ZIP codes whose reference points sit closest to 51637.
ZIP code	Distance	Delivers to
ZIP code 51630	4.8 mi	Blanchard, IA
ZIP code 51651	5.3 mi	Shambaugh, IA
ZIP code 51636	6.3 mi	Coin, IA
ZIP code 51631	6.5 mi	Braddyville, IA
ZIP code 64445	7.4 mi	Elmo, MO
ZIP code 51656	8.1 mi	Yorktown, IA
ZIP code 64431	9.4 mi	Clearmont, MO
ZIP code 51632	9.5 mi	Clarinda, IA

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 51637, plotted from its record coordinates.

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

Scope ZIP code 51637. 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.