| Town / County |
Town / County |
Town / County |
| Cadda / Scott | Cairo / Louisa | Calamus / Clinton |
| Calanan / Hamilton | Caldwell City / Appanoose | Caldwells / Dallas |
| Caledonia / Dubuque | Caledonia / Ringgold | Calhoun / Appanoose |
| Calhoun / Calhoun | Calhoun / Harrison | Calhoun Center / Calhoun |
| California / Harrison | California Junction / Harrison | Callanan / Hamilton |
| Callender / Webster | Calliope / Sioux | Calmar / Winneshiek |
| Caloma / Marion | Calos / Webster | Calumet / O'Brien |
| Calvin / Black Hawk | Camackville / Lee | Camanche / Clinton |
| Camargo / Lee | Cambria / Wayne | Cambridge / Clinton |
| Cambridge / Story | Camden / Appanoose | Camden / Story |
| Cameron / Cedar | Cameron / Cerro Gordo | Cameron / Dubuque |
| Camp / Polk | Camp Douglas / Polk | Campbell / Polk |
| Campton / Delaware | Campus / Story | Cana / Buchanan |
| Canaan / Adams | Canby / Adair | Canfield / Black Hawk |
| Cannonsburg / Louisa | Canoe / Winneshiek | Canton / Jackson |
| Canton / Jones | Cantril / Van Buren | Capoli / Allamakee |
| Capptown / Floyd | Capron / Marshall | Carbon / Adams |
| Carbon / Davis | Carbon / Polk | Carbon / Webster |
| Carbon Hill / Davis | Carbonado / Mahaska | Carbondale / Adair |
| Carbondale / Polk | Cardiff / Mitchell | Carl / Adams |
| Carlisle / Cedar | Carlisle / Warren | Carlson / Scott |
| Carmel / Sioux | Carnaryon / Sac | Carnes / Sioux |
| Carney / Floyd | Carney / Polk | Carney's Siding / Cherokee |
| Carnforth / Poweshiek | Carpenter / Mitchell | Carr / Jasper |
| Carr's Point / Montgomery | CARROLL / Carroll | Carroll / Tama |
| Carroll City / Carroll | Carrollport / Jackson | Carrollton / Carroll |
| Carrville / Floyd | Carson / Adams | Carson / Pottawattamie |
| Carson's Point / Boone | Carter / Iowa | Carter Lake / Pottawattamie |
| Cartersville / Cerro Gordo | Cartersville / Pottawattamie | Carthage / Johnson |
| Carvers / Allamakee | Cary / Palo Alto | Casady / Webster |
| Cascade / Dubuque | Cascade / Jones | Casey / Adair |
| Casey / Guthrie | Cass / Clayton | Cass / Jones |
| Cass Centre / Cass | Cass Centre / Jones | Cassaday's Corners / Boone |
| Castalia / Winneshiek | Castana / Monona | Castle Grove / Jones |
| Castle Hill / Black Hawk | Castleville / Buchanan | Catteese / Dubuque |
| Catteese / Louisa | Cautauqua / Pottawattamie | Cecilia / Howard |
| Cedar / Cedar | Cedar / Linn | Cedar / Mahaska |
| Cedar Bluff / Cedar | Cedar City / Black Hawk | Cedar Creek / Greene |
| Cedar Crossroads / Marshall | Cedar Falls / Black Hawk | Cedar Falls Junction / Black Hawk |
| Cedar Forks / Sac | Cedar Grove / Lucas | Cedar Heights / Black Hawk |
| Cedar Heights Siding / Black Hawk | Cedar Mines / Monroe | CEDAR RAPIDS / Linn |
| Cedar River / Cedar | Cedar Town / Muscatine | Cedar Valley / Black Hawk |
| Cedar Valley / Cedar | Cedar Valley Quarry / Cedar | Cedarville / Pocahontas |
| Cedarville / Washington | Cement Quarry / Madison | Cement Works / Madison |
| Center / Black Hawk | Center / Dubuque | Center Grove / Dubuque |
| Center Junction / Jones | Center Point / Linn | Centerdale / Cedar |
| CENTERVILLE / Appanoose | Centerville / Boone | Centerville / Des Moines |
| Centerville / Jackson | Central City / Linn | Centralia / Dubuque |
| Centre / Page | Centre Grove / Muscatine | Centre Hill / Washington |
| Centre Town / Dubuque | Centre Valley / Allamakee | Ceres / Clayton |
| Cerro Gordo / Mills | Cessford / Cedar | Chaldea / Appanoose |
| Chamberlain / Dallas | Chancy / Clinton | Chancy Station / Clinton |
| Chandler / Keokuk | Chandler / Mahaska | Channingville / Dubuque |
| Chantry / Allamakee | Chapin / Franklin | Chapin (Old) / Franklin |
| CHARITON / Lucas | CHARLES CITY / Floyd | Charleston / Jackson |
| Charleston / Lee | Charlotte / Clinton | Charlottsville / Madison |
| Charter Oak / Crawford | Chase / Johnson | Chatham / Buchanan |
| Chatsworth / Sioux | Chattanooga / Dallas | Chelsea / Tama |
| Cheney / Benton | Chequest (#1) / Davis | Chequest (#2) / Davis |
| CHEROKEE / Cherokee | Cherokee (Old) / Cherokee | Cherokee Center / Cherokee |
| Cherry / Mahaska | Cherry Wood / Clinton | Chester / Howard |
| Chester Center / Poweshiek | Chesterfield / Polk | Cheyenne / Keokuk |
| Chicago / Dallas | Chicago Anamosa / Jones | Chickasaw / Chickasaw |
| Chickasaw Center / Chickasaw | Chickasaw Station / Chickasaw | Chillicothe / Wapello |
| Chisholm / Monroe | Christiansburg / Wapello | Christy / Polk |
| Christy Town / Hamilton | Church / Allamakee | Churchville / Scott |
| Churchville / Warren | Churdan / Greene | Cincinnati / Appanoose |
| Cincinnati / Harrison | Circleville / Polk | Cisco / Jasper |
| Civil Bend / Fremont | Civil Point / Audubon | Clanton / Madison |
| Clara / Pottawattamie | Clare / Webster | Clarence / Cedar |
| Clarendon / Ida | CLARINDA / Page | CLARION / Wright |
| Clark / Clay | Clark / Mills | Clark's Ferry / Scott |
| Clark's Point / Monroe | Clarksdale / Appanoose | Clarkson / Warren |
| Clarkstown / Jackson | Clarksville / Butler | Clarksville / Monroe |
| Clay / Clay | Clay / Washington | Clay Mill / Jones |
| Clay's Grove / Lee | Clayford / Jones | Clayton / Clayton |
| Clayton / Pottawattamie | Clayworks / Webster | Clear Creek / Allamakee |
| Clear Lake / Cerro Gordo | Clear Lake City / Cerro Gordo | Clear Lake Junction / Cerro Gordo |
| Clearfield / Poweshiek | Clearfield / Ringgold | Clearfield / Taylor |
| Cleghorn / Cherokee | Clemons / Marshall | Clermont / Fayette |
| Cleveland / Allamakee | Cleveland / Lucas | Cleves / Hardin |
| Cliffland / Wapello | Clifton / Louisa | Clifton / Winneshiek |
| Climax / Montgomery | Climbing Hill / Woodbury | CLINTON / Clinton |
| Clinton Center / Wayne | Clio / Wayne | Clipper / Ringgold |
| Clive / Polk | Cloud / Marion | Cloverdale / Osceola |
| Cloverhill / Polk | Clucas / Madison | Clutier / Tama |
| Clutterville / Butler | Clyde / Jasper | Coal City / Appanoose |
| Coal Creek / Keokuk | Coal Hill / Polk | Coal Siding / Jasper |
| Coal Valley / Boone | Coaldale / Polk | Coalfield / Monroe |
| Coalport / Jefferson | Coalport / Marion | Coalton / Monroe |
| Coaltown / Boone | Coaltown / Jasper | Coalville / Webster |
| Cobb / Jackson | Coburg / Montgomery | Coe's Grove / Montgomery |
| Coffin's Grove / Delaware | Coggon / Linn | Coin / Page |
| Colbia / Keokuk | Colbyville / Story | Cold Spring / Pottawattamie |
| Cold Springs / Cass | Cold Water / Delaware | Coldville / Tama |
| Coldwater / Butler | Coldwater / Cerro Gordo | Coldwater / Franklin |
| Cole Junction / Henry | Colesburg / Delaware | Colfax / Jasper |
| Colfax Springs / Jasper | College Farm / Story | College Springs / Page |
| Collegeton / Story | Collett / Jefferson | Collins / Story |
| Collins Centre / Story | Collins Grove / Tama | Colo / Story |
| Coloma / Jackson | Colony / Delaware | Columbia / Marion |
| Columbia / Tama | Columbia / Wapello | Columbus / Allamakee |
| Columbus / Linn | Columbus / Van Buren | Columbus City / Louisa |
| Columbus Junction / Louisa | Colwell / Floyd | Comet / Mahaska |
| Commerce / Polk | Commerce Mills / Polk | Communia / Clayton |
| Como / Crawford | Competine / Wapello | Comstock / Wapello |
| Concert / Mahaska | Concord / Hancock | Concord / Louisa |
| Condit / Jones | Conesville / Muscatine | Confidence / Wayne |
| Conger / Warren | Congress / Franklin | Conkling / Audubon |
| Connables / Lee | Connell / Tama | Connor / Allamakee |
| Cono / Iowa | Conover / Winneshiek | Conrad / Grundy |
| Conrad Grove / Grundy | Conroy / Iowa | Consol / Monroe |
| Conway / Taylor | Conway Crossing / Taylor | Cool / Warren |
| Coon Grove / Crawford | Coon Rapids / Carroll | Coon Valley / Polk |
| Coon Valley / Sac | Coonville / Mills | Cooper / Greene |
| Cooper / Marion | Cooper Springs / Marion | Coopersville / Wapello |
| Cope / Polk | Copeland / Keokuk | Copi / Johnson |
| Coplin's Grove / Carroll | Copper Creek / Jackson | Coppock / Henry |
| Coppock / Jefferson | Coppock / Washington | Cora / Decatur |
| Cora / Des Moines | Cora / Fremont | Cora / Mitchell |
| Cora / Pocahontas | Coralville / Johnson | Cordova / Marion |
| Corley / Shelby | Corn Hill / Fayette | Corn Valley / Sioux |
| Cornelia / Ida | Cornelia / Wright | Cornell / Clay |
| CORNING / Adams | Correctionville / Woodbury | Corwith / Hancock |
| Cory / Keokuk | Cory Patch / Keokuk | Cory's Grove / Polk |
| Corydon / Polk | CORYDON / Wayne | Cosgrove / Johnson |
| Coster / Butler | Cottage / Hardin | Cottage Grove / Scott |
| Cottage Hill / Dubuque | Cotter / Louisa | Cotton Grove / Henry |
| Cottonville / Jackson | Cottonwood / Lee | Cou Falls / Johnson |
| Coulson / Cherokee | Coulter / Franklin | Council Bluff / Pottawattamie |
| COUNCIL BLUFFS / Pottawattamie | Council Hill / Clayton | Council Point / Pottawattamie |
| County / Black Hawk | County Home / Wapello | County Line / Jefferson |
| Courtwright / Lee | Cousins / Linn | Covington / Linn |
| Cox Creek / Clayton | Coyton / Buchanan | Crab Apple / Linn |
| Crabb / Jackson | Crabb's Mills / Jackson | Crackers Neck / Keokuk |
| Craig / Plymouth | Craig's Hollow / Webster | Crain Creek / Black Hawk |
| Crandall / Calhoun | Crane Creek / Howard | Cranston / Muscatine |
| Crathorne / Plymouth | Crawford / Crawford | Crawfordsville / Washington |
| Cream Hill / Franklin | Creamery / Cerro Gordo | Creesville / Jefferson |
| Crescent / Pottawattamie | Crescent City / Pottawattamie | CRESCO / Howard |
| Cresco / Kossuth | Cresswell / Keokuk | CRESTON / Union |
| Crete / Appanoose | Cricket / Mahaska | Crippen / Palo Alto |
| Crisp / Harrison | Crocker / Polk | Cromwell / Union |
| Cromwell Centre / Clay | Crooked Creek / Henry | Crooks / Page |
| Crooks / Webster | Crosby / Fremont | Crosier / Decatur |
| Cross / Ringgold | Crossing / Adair | Crossing / Clay |
| Crossing / Marshall | Crossing / Mills | Crossing / Tama |
| Croton / Lee | Crow Creek / Linn | Crown / Buena Vista |
| Crown / Decatur | Crown Point / Wright | Crozier / Buena Vista |
| Crystal / Tama | Crystal Lake / Hancock | Cuba / Hancock |
| Cuba / Keokuk | Cuba / Monroe | Cuba City / Louisa |
| Culver / Muscatine | Cumberland / Cass | Cumberland Junction / Union |
| Cumming / Warren | Curlew / Palo Alto | Curry / Webster |
| Curtis / Johnson | Cushing / Woodbury | Cylinder / Palo Alto |
| Cynthiann / Wapello | Cyreno / O'Brien |
