Clay County, Iowa Zip Codes

Zip Code	City	Population
51301	Spencer	12,326
51338	Everly	933
51357	Royal	744
51047	Peterson	690
51033	Linn Grove	460
51333	Dickens	394
51366	Webb	303
51343	Greenville	284
51340	Fostoria	93
51341	Gillett Grove	39

Population is the most recent figure from the U.S. Census Bureau's 2022 American Community Survey (ACS) 5-Year Estimates.