Halbur to Irwin
(Click a column header to sort)
| City | Population |
| Halbur | 213 |
| Hamburg | 1,240 |
| Hamilton | 144 |
| Hampton | 4,218 |
| Hancock | 207 |
| Hanlontown | 229 |
| Hansell | 96 |
| Harcourt | 340 |
| Hardy | 57 |
| Harlan | 5,282 |
| Harper | 134 |
| Harpers Ferry | 330 |
| Harris | 200 |
| Hartford | 759 |
| Hartley | 1,733 |
| Hartwick | 83 |
| Harvey | 277 |
| Hastings | 214 |
| Havelock | 177 |
| Haverhill | 170 |
| Hawarden | 2,478 |
| Hawkeye | 489 |
| Hayesville | 64 |
| Hazleton | 950 |
| Hedrick | 837 |
| Henderson | 171 |
| Hepburn | 39 |
| Hiawatha | 6,480 |
| Hills | 679 |
| Hillsboro | 205 |
| Hinton | 808 |
| Holland | 250 |
| Holstein | 1,470 |
| Holy Cross | 339 |
| Hopkinton | 681 |
| Hornick | 253 |
| Hospers | 672 |
| Houghton | 130 |
| Hubbard | 885 |
| Hudson | 2,117 |
| Hull | 1,960 |
| Humboldt | 4,452 |
| Humeston | 543 |
| Huxley | 2,959 |
| Ida Grove | 2,350 |
| Imogene | 66 |
| Independence | 6,014 |
| Indianola | 14,156 |
| Inwood | 875 |
| Ionia | 277 |
| Iowa City | 62,380 |
| Iowa Falls | 5,193 |
| Ireton | 585 |
| Irwin | 372 |
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