O'Brien County ZIP Codes

List of ZIP Codes in O'Brien County

The following table lists ZIP Codes associated with O'Brien County, Iowa, based on ZIP Code Tabulation Area (ZCTA) data from the U.S. Census Bureau.

S.N.	Zip Code	Latitude	Longitude	City	Population	Density
1	51009	42.94499	-95.55142	Calumet	131	189.9
2	51022	42.97819	-95.84722	Granville	966	4.9
3	51046	42.96621	-95.67949	Paullina	1,407	5.8
4	51058	42.98367	-95.46879	Sutherland	1,020	4.6
5	51231	43.10567	-95.74131	Archer	543	8.7
6	51245	43.07788	-95.60149	Primghar	1,264	6.3
7	51248	43.20445	-95.65911	Sanborn	1,643	8.0
8	51346	43.18638	-95.45927	Hartley	2,211	5.8

About O'Brien County ZIP Codes

O'Brien County in Iowa (IA) is served by approximately 8 ZIP Codes. These codes cover residential neighborhoods, business districts, and rural areas that fall under the county's jurisdiction.

Based on ZIP-level population estimates, the total population covered by these ZIP Codes is around 9,185 people. Population and density values vary from one ZIP Code to another, reflecting the mix of dense urban communities and lower-density suburban or rural zones.

Many of the most significant population centers in O'Brien County are located in cities such as Hartley, Sanborn, Paullina, Primghar, Sutherland. These cities and towns help define the economic and demographic character of the county.

Most ZIP Codes in O'Brien County, Iowa follow the America/Chicago time zone.

O'Brien County ZIP Codes

List of ZIP Codes in O'Brien County

About O'Brien County ZIP Codes

Iowa Counties ZIP Codes

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