ZIP codes

ZIP codes in Iowa by county

Iowa has 972 ZIP codes in its 99 counties. 455 of them cross a county line and 10 cross into a neighboring state. Polk County has the most, 41.

By the All Map Tools Team

ZIP codes: 972; With 1% or more of their land in the state
Counties: 99; 5 with a page of their own below
Cross a county line: 455; 1% or more of their land in another county
Cross a state line: 10; 1% or more of their land in another state
County with the most: 41; Polk County
Most populated ZIP: 50023; 46,306 people · Ankeny

ZIP codes per county in Iowa

7–12
13–15
16–19
20–41

Open in the interactive tool

Counties and their ZIP codes

County	Population (2025)	ZIP codes	Shared
Adair County	7,403	14	11
Adams County	3,617	10	9
Allamakee County	14,238	10	6
Appanoose County	12,077	11	6
Audubon County	5,509	12	9
Benton County	26,004	24	14
Black Hawk County	131,532	17	9
Boone County	26,799	21	16
Bremer County	25,296	13	9
Buchanan County	20,883	15	10
Buena Vista County	20,449	14	11
Butler County	14,049	18	13
Calhoun County	9,562	15	12
Carroll County	20,303	17	8
Cass County	12,960	13	12
Cedar County	18,359	18	14
Cerro Gordo County	42,372	17	12
Cherokee County	11,369	15	10
Chickasaw County	11,663	9	8
Clarke County	9,574	9	8
Clay County	16,202	17	11
Clayton County	16,845	24	14
Clinton County	46,002	21	9
Crawford County	16,237	21	13
Dallas County	118,457	25	18
Davis County	9,230	10	8
Decatur County	7,655	11	6
Delaware County	17,674	16	10
Des Moines County	38,077	12	6
Dickinson County	18,077	10	5
Dubuque County	99,381	20	12
Emmet County	9,107	7	5
Fayette County	19,047	23	15
Floyd County	14,901	12	9
Franklin County	9,868	19	12
Fremont County	6,522	11	5
Greene County	8,658	13	12
Grundy County	12,361	17	11
Guthrie County	10,782	16	14
Hamilton County	14,944	14	9
Hancock County	10,528	13	9
Hardin County	16,455	12	9
Harrison County	14,623	15	9
Henry County	19,349	12	10
Howard County	9,415	9	6
Humboldt County	9,409	17	14
Ida County	6,777	12	11
Iowa County	16,504	20	13
Jackson County	19,288	16	12
Jasper County	38,153	21	15
Jefferson County	15,291	16	14
Johnson County	160,044	24	15
Jones County	21,253	17	12
Keokuk County	9,797	20	14
Kossuth County	14,322	21	14
Lee County	32,306	13	5
Linn County	232,028	29	14
Louisa County	10,416	12	9
Lucas County	8,847	9	8
Lyon County	12,354	12	7
Madison County	17,270	15	13
Mahaska County	21,880	19	14
Marion County	34,192	17	10
Marshall County	39,890	21	15
Mills County	14,793	11	6
Mitchell County	10,650	12	7
Monona County	8,539	14	9
Monroe County	7,406	7	5
Montgomery County	10,002	10	8
Muscatine County	41,853	14	12
O'Brien County	14,220	14	11
Osceola County	5,980	8	6
Page County	14,856	13	7
Palo Alto County	8,899	14	11
Plymouth County	25,697	14	9
Pocahontas County	6,819	15	11
Polk County	516,546	41	18
Pottawattamie County	92,996	24	12
Poweshiek County	18,368	16	12
Ringgold County	4,642	12	8
Sac County	9,525	15	11
Scott County	175,259	21	5
Shelby County	11,689	18	12
Sioux County	36,774	19	12
Story County	101,291	21	13
Tama County	16,796	19	14
Taylor County	5,835	11	7
Union County	11,829	11	7
Van Buren County	7,131	13	11
Wapello County	35,210	11	7
Warren County	57,331	20	13
Washington County	22,667	13	10
Wayne County	6,738	13	8
Webster County	36,838	21	12
Winnebago County	10,251	10	6
Winneshiek County	19,733	12	10
Woodbury County	106,649	26	12
Worth County	7,338	10	7
Wright County	12,801	16	13

Every ZIP code in Iowa, by county

A ZIP code that crosses a county line appears in each county it has 1% or more of its land in.

Adair County (14): 50002, 50020, 50048, 50070, 50155, 50164, 50250, 50273, 50801, 50837, 50846, 50849, 50858, 50859
Adams County (10): 50801, 50837, 50839, 50841, 50843, 50851, 50853, 50857, 50859, 50864
Allamakee County (10): 52101, 52140, 52146, 52151, 52156, 52159, 52160, 52162, 52170, 52172
Appanoose County (11): 52544, 52549, 52555, 52569, 52571, 52572, 52574, 52581, 52590, 52593, 52594
Audubon County (12): 50002, 50020, 50022, 50025, 50042, 50058, 50076, 50110, 50117, 51455, 51531, 51543
Benton County (24): 50651, 52206, 52208, 52209, 52210, 52213, 52224, 52225, 52228, 52229, 52249, 52257, 52301, 52313, 52315, 52318, 52324, 52332, 52345, 52346, 52349, 52351, 52352, 52354
Black Hawk County (17): 50612, 50613, 50623, 50626, 50629, 50634, 50643, 50647, 50648, 50651, 50667, 50669, 50675, 50701, 50702, 50703, 50707
Boone County (21): 50014, 50031, 50036, 50039, 50040, 50064, 50107, 50134, 50152, 50156, 50212, 50217, 50220, 50223, 50235, 50243, 50244, 50248, 50249, 50276, 50530
Bremer County (13): 50622, 50629, 50630, 50631, 50645, 50647, 50658, 50666, 50668, 50670, 50674, 50676, 50677
Buchanan County (15): 50607, 50629, 50641, 50644, 50648, 50650, 50654, 50662, 50671, 50682, 52210, 52218, 52326, 52329, 52352
Buena Vista County (14): 50510, 50554, 50565, 50568, 50576, 50585, 50588, 50592, 51002, 51005, 51020, 51033, 51047, 51366
Butler County (18): 50433, 50601, 50602, 50604, 50605, 50608, 50611, 50613, 50619, 50625, 50636, 50649, 50658, 50660, 50665, 50666, 50670, 50677
Calhoun County (15): 50050, 50538, 50540, 50551, 50552, 50561, 50563, 50566, 50575, 50579, 50583, 50586, 51433, 51449, 51453
Carroll County (17): 50050, 50058, 51401, 51430, 51436, 51440, 51443, 51444, 51449, 51451, 51452, 51453, 51455, 51459, 51462, 51463, 51467
Cass County (13): 50020, 50022, 50042, 50274, 50837, 50843, 50853, 50864, 51532, 51535, 51544, 51552, 51577
Cedar County (18): 52216, 52253, 52255, 52306, 52320, 52323, 52333, 52337, 52358, 52720, 52721, 52747, 52760, 52765, 52772, 52776, 52777, 52778
Cerro Gordo County (17): 50401, 50428, 50433, 50434, 50444, 50449, 50456, 50457, 50458, 50464, 50467, 50468, 50469, 50475, 50477, 50479, 50482
Cherokee County (15): 51002, 51005, 51012, 51014, 51020, 51025, 51029, 51035, 51037, 51046, 51047, 51048, 51049, 51058, 51061
Chickasaw County (9): 50603, 50616, 50630, 50645, 50658, 50659, 50674, 52154, 52171
Clarke County (9): 50108, 50123, 50174, 50210, 50213, 50222, 50257, 50264, 50275
Clay County (17): 50515, 50565, 50585, 51033, 51047, 51058, 51301, 51333, 51338, 51340, 51341, 51343, 51346, 51357, 51358, 51364, 51366
Clayton County (24): 50606, 52035, 52042, 52043, 52044, 52047, 52048, 52049, 52050, 52052, 52053, 52066, 52072, 52073, 52076, 52077, 52135, 52141, 52156, 52157, 52158, 52159, 52162, 52169
Clinton County (21): 52037, 52060, 52064, 52069, 52070, 52207, 52254, 52323, 52701, 52727, 52729, 52730, 52731, 52732, 52742, 52750, 52751, 52757, 52771, 52774, 52777
Crawford County (21): 51006, 51019, 51034, 51060, 51432, 51436, 51439, 51441, 51442, 51448, 51454, 51455, 51460, 51461, 51465, 51466, 51467, 51520, 51527, 51528, 51529
Dallas County (25): 50003, 50038, 50039, 50061, 50063, 50066, 50069, 50070, 50072, 50109, 50111, 50128, 50146, 50156, 50167, 50220, 50233, 50235, 50261, 50263, 50266, 50276, 50277, 50323, 50325
Davis County (10): 52537, 52551, 52552, 52554, 52560, 52570, 52572, 52584, 52588, 52594
Decatur County (11): 50065, 50067, 50103, 50108, 50123, 50133, 50140, 50144, 50147, 50262, 50264
Delaware County (16): 50654, 52035, 52036, 52038, 52040, 52041, 52042, 52050, 52057, 52065, 52076, 52078, 52218, 52223, 52237, 52330
Des Moines County (12): 52601, 52623, 52637, 52638, 52640, 52644, 52645, 52646, 52650, 52655, 52658, 52660
Dickinson County (10): 51331, 51334, 51338, 51345, 51347, 51351, 51355, 51360, 51363, 51364
Dubuque County (20): 52001, 52002, 52003, 52031, 52032, 52033, 52039, 52040, 52045, 52046, 52052, 52053, 52054, 52056, 52065, 52068, 52073, 52078, 52079, 52237
Emmet County (7): 50514, 50531, 50578, 51334, 51342, 51364, 51365
Fayette County (23): 50606, 50607, 50629, 50650, 50655, 50662, 50664, 50671, 50674, 50681, 52133, 52135, 52141, 52142, 52144, 52147, 52161, 52162, 52164, 52166, 52169, 52171, 52175
Floyd County (12): 50433, 50435, 50458, 50460, 50468, 50471, 50616, 50620, 50636, 50645, 50653, 50658
Franklin County (19): 50006, 50041, 50071, 50126, 50227, 50420, 50427, 50431, 50433, 50441, 50452, 50457, 50470, 50475, 50479, 50601, 50605, 50625, 50633
Fremont County (11): 51601, 51639, 51640, 51645, 51647, 51648, 51649, 51650, 51652, 51653, 51654
Greene County (13): 50026, 50029, 50050, 50058, 50064, 50107, 50128, 50129, 50217, 50220, 50235, 51453, 51462
Grundy County (17): 50601, 50604, 50609, 50613, 50621, 50624, 50627, 50638, 50642, 50643, 50657, 50660, 50665, 50669, 50672, 50673, 50680
Guthrie County (16): 50002, 50020, 50025, 50026, 50029, 50048, 50058, 50070, 50115, 50128, 50146, 50164, 50216, 50233, 50250, 50277
Hamilton County (14): 50034, 50036, 50075, 50130, 50132, 50230, 50231, 50246, 50248, 50249, 50271, 50532, 50595, 50599
Hancock County (13): 50423, 50430, 50432, 50436, 50438, 50439, 50447, 50449, 50457, 50480, 50482, 50483, 50484
Hardin County (12): 50006, 50102, 50122, 50126, 50154, 50206, 50230, 50258, 50269, 50601, 50627, 50672
Harrison County (15): 51523, 51529, 51545, 51546, 51550, 51555, 51556, 51557, 51558, 51559, 51563, 51564, 51565, 51570, 51579
Henry County (12): 52623, 52630, 52635, 52641, 52644, 52645, 52647, 52649, 52652, 52654, 52656, 52659
Howard County (9): 50466, 50603, 50628, 52132, 52134, 52136, 52154, 52155, 52163
Humboldt County (17): 50430, 50516, 50519, 50520, 50529, 50533, 50541, 50542, 50545, 50548, 50558, 50560, 50570, 50577, 50582, 50591, 50597
Ida County (12): 51006, 51016, 51018, 51019, 51020, 51025, 51053, 51061, 51431, 51445, 51448, 51461
Iowa County (20): 50136, 52203, 52208, 52209, 52220, 52221, 52222, 52236, 52251, 52301, 52307, 52308, 52316, 52318, 52325, 52334, 52347, 52355, 52356, 52361
Jackson County (16): 52030, 52031, 52032, 52037, 52054, 52060, 52064, 52069, 52070, 52071, 52074, 52075, 52079, 52207, 52309, 52731
Jasper County (21): 50028, 50054, 50055, 50106, 50112, 50127, 50135, 50137, 50141, 50153, 50161, 50162, 50168, 50169, 50170, 50208, 50228, 50232, 50234, 50237, 50251
Jefferson County (16): 52533, 52535, 52540, 52554, 52556, 52557, 52563, 52567, 52576, 52580, 52585, 52588, 52635, 52641, 52651, 52654
Johnson County (24): 52203, 52227, 52228, 52235, 52240, 52241, 52242, 52245, 52246, 52247, 52253, 52317, 52322, 52325, 52327, 52333, 52338, 52340, 52356, 52358, 52404, 52755, 52766, 52776
Jones County (17): 52032, 52033, 52205, 52212, 52216, 52237, 52252, 52253, 52305, 52306, 52309, 52310, 52312, 52320, 52321, 52323, 52362
Keokuk County (20): 50104, 50136, 50255, 50268, 52231, 52248, 52316, 52335, 52355, 52356, 52550, 52561, 52562, 52563, 52568, 52576, 52580, 52585, 52586, 52591
Kossuth County (21): 50424, 50430, 50451, 50480, 50483, 50484, 50511, 50514, 50517, 50519, 50522, 50539, 50556, 50558, 50559, 50560, 50570, 50590, 50597, 50598, 56027
Lee County (13): 52619, 52624, 52625, 52626, 52627, 52630, 52631, 52632, 52639, 52649, 52656, 52657, 52658
Linn County (29): 52202, 52205, 52213, 52214, 52218, 52219, 52227, 52228, 52233, 52253, 52302, 52305, 52310, 52314, 52324, 52328, 52332, 52336, 52338, 52341, 52344, 52351, 52352, 52401, 52402, 52403, 52404, 52405, 52411
Louisa County (12): 52621, 52640, 52646, 52653, 52659, 52737, 52738, 52739, 52752, 52754, 52755, 52761
Lucas County (9): 50049, 50068, 50123, 50139, 50151, 50238, 50272, 50275, 52569
Lyon County (12): 51201, 51230, 51232, 51235, 51237, 51239, 51240, 51241, 51242, 51243, 51246, 51247
Madison County (15): 50033, 50061, 50070, 50072, 50149, 50155, 50210, 50211, 50218, 50222, 50229, 50240, 50257, 50261, 50273
Mahaska County (19): 50027, 50044, 50104, 50143, 50153, 50171, 50207, 50219, 50251, 50256, 50268, 52534, 52543, 52550, 52553, 52561, 52577, 52586, 52595
Marion County (17): 50044, 50057, 50062, 50116, 50119, 50138, 50139, 50143, 50163, 50170, 50214, 50219, 50225, 50228, 50237, 50252, 50256
Marshall County (21): 50005, 50028, 50051, 50055, 50078, 50106, 50120, 50141, 50142, 50148, 50158, 50162, 50206, 50234, 50239, 50247, 50258, 50609, 50621, 50632, 50635
Mills County (11): 51503, 51533, 51534, 51540, 51541, 51551, 51554, 51561, 51571, 51645, 51653
Mitchell County (12): 50426, 50454, 50455, 50458, 50460, 50461, 50464, 50466, 50471, 50472, 50476, 50628
Monona County (14): 51010, 51026, 51034, 51040, 51051, 51055, 51056, 51060, 51063, 51523, 51529, 51545, 51558, 51572
Monroe County (7): 50044, 50150, 52531, 52536, 52553, 52569, 52571
Montgomery County (10): 50847, 50857, 50864, 51532, 51533, 51541, 51566, 51573, 51638, 51645
Muscatine County (14): 52720, 52726, 52739, 52747, 52749, 52754, 52759, 52760, 52761, 52766, 52769, 52773, 52776, 52778
O'Brien County (14): 51009, 51022, 51029, 51046, 51047, 51058, 51201, 51231, 51232, 51238, 51245, 51248, 51346, 51350
Osceola County (8): 51232, 51243, 51248, 51249, 51345, 51346, 51350, 51354
Page County (13): 50864, 51566, 51601, 51630, 51631, 51632, 51636, 51637, 51638, 51645, 51647, 51651, 51656
Palo Alto County (14): 50515, 50527, 50528, 50536, 50539, 50546, 50554, 50562, 50578, 50581, 50597, 50598, 51342, 51358
Plymouth County (14): 51001, 51008, 51022, 51024, 51027, 51028, 51031, 51038, 51045, 51048, 51050, 51062, 51108, 51109
Pocahontas County (15): 50510, 50520, 50524, 50540, 50541, 50546, 50554, 50562, 50563, 50571, 50573, 50574, 50575, 50581, 50593
Polk County (41): 50007, 50009, 50021, 50023, 50032, 50035, 50046, 50047, 50061, 50073, 50109, 50111, 50124, 50131, 50156, 50161, 50168, 50169, 50226, 50237, 50243, 50244, 50265, 50266, 50309, 50310, 50311, 50312, 50313, 50314, 50315, 50316, 50317, 50319, 50320, 50321, 50322, 50323, 50324, 50325, 50327
Pottawattamie County (24): 51501, 51503, 51510, 51521, 51525, 51526, 51532, 51535, 51536, 51541, 51542, 51544, 51548, 51549, 51553, 51555, 51559, 51560, 51566, 51570, 51571, 51575, 51576, 51577
Poweshiek County (16): 50104, 50106, 50112, 50153, 50157, 50171, 50207, 50242, 52208, 52211, 52215, 52221, 52222, 52232, 52339, 52347
Ringgold County (12): 50074, 50133, 50140, 50835, 50836, 50840, 50845, 50851, 50854, 50860, 50861, 50863
Sac County (15): 50535, 50540, 50561, 50567, 50568, 50583, 51020, 51053, 51431, 51433, 51436, 51448, 51450, 51458, 51466
Scott County (21): 52722, 52726, 52728, 52745, 52746, 52747, 52748, 52753, 52756, 52758, 52765, 52767, 52768, 52769, 52773, 52801, 52802, 52803, 52804, 52806, 52807
Shelby County (18): 50022, 51446, 51447, 51454, 51455, 51521, 51527, 51529, 51530, 51531, 51537, 51543, 51552, 51562, 51565, 51570, 51577, 51578
Sioux County (19): 51003, 51011, 51022, 51023, 51027, 51031, 51036, 51041, 51050, 51201, 51234, 51235, 51238, 51239, 51240, 51244, 51247, 51250, 57034
Story County (21): 50010, 50012, 50013, 50014, 50046, 50055, 50056, 50105, 50124, 50134, 50154, 50161, 50201, 50206, 50236, 50239, 50243, 50244, 50247, 50248, 50278
Tama County (19): 50106, 50158, 50173, 50609, 50612, 50632, 50635, 50651, 50652, 50669, 50675, 52208, 52215, 52217, 52224, 52225, 52339, 52342, 52348
Taylor County (11): 50833, 50836, 50840, 50841, 50848, 50851, 50857, 50862, 50864, 51632, 51646
Union County (11): 50074, 50149, 50174, 50254, 50801, 50830, 50831, 50842, 50845, 50851, 50861
Van Buren County (13): 52535, 52542, 52551, 52554, 52565, 52567, 52570, 52573, 52588, 52620, 52626, 52630, 52651
Wapello County (11): 52501, 52530, 52533, 52536, 52537, 52548, 52552, 52553, 52554, 52563, 52566
Warren County (20): 50001, 50047, 50061, 50118, 50125, 50139, 50145, 50151, 50160, 50166, 50210, 50211, 50225, 50229, 50240, 50241, 50252, 50257, 50265, 50320
Washington County (13): 52201, 52247, 52248, 52327, 52353, 52356, 52359, 52540, 52585, 52621, 52641, 52654, 52738
Wayne County (13): 50008, 50049, 50052, 50060, 50068, 50123, 50147, 50165, 50238, 52569, 52581, 52583, 52590
Webster County (21): 50249, 50501, 50516, 50518, 50521, 50523, 50524, 50530, 50532, 50533, 50538, 50543, 50544, 50548, 50557, 50563, 50566, 50569, 50586, 50591, 50594
Winnebago County (10): 50424, 50436, 50446, 50450, 50453, 50465, 50473, 50478, 50480, 50484
Winneshiek County (12): 52101, 52132, 52133, 52136, 52140, 52144, 52161, 52162, 52165, 52168, 52171, 52172
Woodbury County (26): 51004, 51006, 51007, 51015, 51016, 51018, 51019, 51026, 51028, 51030, 51034, 51039, 51044, 51048, 51052, 51054, 51055, 51056, 51101, 51103, 51104, 51105, 51106, 51108, 51109, 51111
Worth County (10): 50434, 50440, 50444, 50446, 50448, 50450, 50456, 50459, 50464, 50472
Wright County (16): 50034, 50071, 50101, 50271, 50420, 50421, 50430, 50447, 50457, 50470, 50525, 50533, 50542, 50577, 50595, 50599

Neighboring states

Tools for Iowa

ZIP codes by county or city Any county or city in Iowa on an interactive map, with CSV US county map Its counties shaded by population, income or your own data Elevation and places of Iowa Its capital, its cities and its highest point, with their elevation

Sources

U.S. Census Bureau, 2020 ZCTA to County, ZCTA to Place and ZCTA to Census Tract Relationship Files (and the 2022 County Subdivision to ZCTA file for Connecticut). Public domain.
U.S. Census Bureau, American Community Survey 2020–2024 5-year estimates, table B01003 (population of each ZIP code, census tract and Connecticut town). Public domain.
U.S. Census Bureau, Vintage 2025 Population Estimates (county population) and 2025 Gazetteer Files (land area and interior point of each ZIP code). Public domain.
U.S. Census Bureau, Cartographic Boundary Files: ZCTAs 2020 and counties 2025, 1:500,000; county adjacency file 2025. Public domain.

How we count. ZIP codes here are the Census Bureau’s ZIP Code Tabulation Areas (ZCTAs), the areas it draws to match USPS ZIP codes; ZIPs with no area of their own (PO boxes, single buildings) aren’t included. A ZIP can cross county lines: “Land in the county” is the exact share of its land inside, from the Census relationship files. “Residents in the county” is the whole ZIP for those entirely inside; for shared ones it’s an estimate, spreading the people of each census tract over the land it shares with the ZIP. Population: ACS 2020–2024. Methodology.

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