| Název | Obyvatele | Nad. výška | Souřadnice | 
| Kalo | 
 | 317 m | 42°25' N; 94°7' W | 
| Kalona (Kalona) | 2 496 | 206 m | 41°28' N; 91°42' W | 
| Kamrar (Kamrar) | 215 | 344 m | 42°23' N; 93°43' W | 
| Kanawha (Kanawha) | 689 | 366 m | 42°56' N; 93°47' W | 
| Kellerton (Kellerton) | 375 | 368 m | 40°42' N; 94°2' W | 
| Kelley (Kelley) | 299 | 313 m | 41°57' N; 93°39' W | 
| Kellogg (Kellogg) | 621 | 259 m | 41°43' N; 92°54' W | 
| Kemper | 
 | 173 m | 40°44' N; 91°7' W | 
| Kendallville | 
 | 325 m | 43°26' N; 92°2' W | 
| Kenfield | 
 | 429 m | 41°34' N; 94°43' W | 
| Kennebec | 
 | 322 m | 42°5' N; 96°0' W | 
| Kennedy | 
 | 290 m | 41°36' N; 94°7' W | 
| Kensett (Kensett) | 273 | 367 m | 43°21' N; 93°12' W | 
| Kent (Kent) | 49 | 375 m | 40°57' N; 94°27' W | 
| Kentner | 
 | 384 m | 42°10' N; 94°49' W | 
| Kenwood | 
 | 383 m | 42°0' N; 95°30' W | 
| Keokuk (Keokuk) | 10 645 | 183 m | 40°23' N; 91°23' W | 
| Keomah Village (Keomah Village) | 91 | 259 m | 41°17' N; 92°32' W | 
| Keosauqua (Keosauqua) | 1 095 | 169 m | 40°43' N; 91°57' W | 
| Keota (Keota) | 965 | 248 m | 41°21' N; 91°57' W | 
| Kesley | 
 | 305 m | 42°39' N; 92°54' W | 
| Keswick (Keswick) | 300 | 268 m | 41°27' N; 92°14' W | 
| Key West | 
 | 258 m | 42°26' N; 90°41' W | 
| Keystone (Keystone) | 664 | 276 m | 41°59' N; 92°11' W | 
| Kidder | 
 | 260 m | 42°27' N; 90°55' W | 
| Kilbourn | 
 | 188 m | 40°48' N; 91°58' W | 
| Killduff | 
 | 289 m | 41°36' N; 92°54' W | 
| Kimballton (Kimballton) | 304 | 394 m | 41°37' N; 95°4' W | 
| Kimze | 
 | 352 m | 41°59' N; 95°23' W | 
| King | 
 | 333 m | 42°24' N; 90°35' W | 
| Kingsley (Kingsley) | 1 229 | 381 m | 42°35' N; 95°58' W | 
| Kingston | 
 | 183 m | 40°58' N; 91°2' W | 
| Kinross (Kinross) | 83 | 244 m | 41°27' N; 91°59' W | 
| Kirkman (Kirkman) | 74 | 372 m | 41°43' N; 95°15' W | 
| Kirkville (Kirkville) | 221 | 259 m | 41°8' N; 92°30' W | 
| Kiron (Kiron) | 263 | 420 m | 42°11' N; 95°19' W | 
| Klemme (Klemme) | 560 | 366 m | 43°0' N; 93°36' W | 
| Kline | 
 | 215 m | 40°55' N; 91°12' W | 
| Klinger | 
 | 310 m | 42°39' N; 92°13' W | 
| Klondike | 
 | 381 m | 43°23' N; 96°31' W | 
| Knierim (Knierim) | 62 | 358 m | 42°27' N; 94°27' W | 
| Knittel | 
 | 304 m | 42°42' N; 92°15' W | 
| Knoke | 
 | 378 m | 42°31' N; 94°45' W | 
| Knowlton | 
 | 334 m | 40°49' N; 94°19' W | 
| Knoxville (Knoxville) | 7 408 | 274 m | 41°19' N; 93°6' W | 
| Konigsmark | 
 | 273 m | 41°53' N; 91°41' W | 
| Kossuth | 
 | 228 m | 41°0' N; 91°8' W | 
| Koszta | 
 | 227 m | 41°49' N; 92°12' W | 
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