This list of tallest buildings in Iowa ranks skyscrapers in the US state of Iowa by height for existing and proposed structures.
| Rank | Name | Image | Heightft (m) | Floors | Year | City | Notes | |
|---|---|---|---|---|---|---|---|---|
| 1 | 801 Grand (previously The Principal Building) | 630 (192) | 45 | 1991 | Des Moines | Office | ||
| 2 | 460 (140) | 36 | 1975 | Des Moines | Office | |||
| 3 | 365 (111) | 33 | 1981 | Des Moines | Hotel | |||
| 4 | 345 (105) | 25 | 1973 | Des Moines | Office | |||
| 5 | 340 (104) | 25 | 1985 | Des Moines | Residential | |||
| T6 | 325 (99) | 25 | 1986 | Des Moines | Office | |||
| T6 | 325 (99) | 19 | 1997 | Des Moines | Office | |||
| 8 | 318 (97) | 19 | 1924 | Des Moines | Residential | |||
| 9 | Alliant Tower | 285 (87) | 21 | 1972 | Cedar Rapids | Office - Tallest building outside of Des Moines | ||
| 10 | Iowa State Capitol | 275 (84) | 4 | 1884 | Des Moines | Government | ||
| 11 | CenturyLink Complex | 273 (83) | 15 | 1928 | Des Moines | Office | ||
| 12 | Davenport Bank and Trust | 255 (77) | 19 | 1927 | Davenport | Office/Residential - Tallest Building outside of Des Moines and Cedar Rapids | ||
| 13 | Register and Tribune Building | 243 (74) | 14 | 1916 | Des Moines | Office | ||
| 14 | Cedar River Tower | 237 (72) | 25 | 1974 | Cedar Rapids | Residential/Office | ||
| 15 | MidAmerican Building | 220 (67) | 15 | 1995 | Davenport | Office | ||
| 16 | Plaza 425 | 207 (63) | 14 | 1983 | Cedar Rapids | Office | ||
| 17 | Dubuque County Courthouse | 205 (62) | 5 | 1893 | Dubuque | Government | ||
| 18 | The Chauncey | 191 (58) | 15 | 2019 | Iowa City | Hotel/Residential | ||
| 19T | Des Moines Building | 190 (58) | 14 | 1930 | Des Moines | Office/Residential | ||
| 19T | Quaker Oats Plant | 190 (58) | 13 | 1927 | Cedar Rapids | Industrial | ||
| 21 | OpenLoop Tower (previously Bank of America Building) | 186 (57) | 14 | 1966 | Des Moines | Office | ||
| 22 | Two Ruan Center | 185 (56) | 14 | 1982 | Des Moines | Office | ||
| 23 | CRST Tower | 180 (54) | 11 | 2017 | Cedar Rapids | Office | ||
| 24 | Veterans Memorial Building | 175 (53) | 10 | 1927 | Cedar Rapids | Government | ||
| 25T | Liberty Building | 174 (53) | 12 | 1923 | Des Moines | Mixed Use | ||
| 25T | Fleming Building | 174 (53) | 11 | 1909 | Des Moines | Office | ||
| 27T | Hippee Building | 172 (52) | 12 | 1913 | Des Moines | Office | ||
| 27T | Davis Brown Tower | 172 (52) | 13 | 2008 | Des Moines | Office | ||
| 29 | Badgerow Building | 169 (52) | 12 | 1933 | Sioux City | Office | ||
| 30 | US Bank Building | 166 (50) | 12 | 1926 | Cedar Rapids | Office | ||
| 31 | Polk County Courthouse | 160 (48) | 4 | 1906 | Des Moines | Government | ||
| 32 | Hubbell Building | 150 (45) | 10 | 1913 | Des Moines | Residential |
| The Fifth | 466 | 40 | Unknown | Des Moines | ||
| 515 Walnut | 359 | 33 | Unknown | Des Moines |
| Years as Tallest | Name | Heightft (m) | Floors | |
|---|---|---|---|---|
| 1884–1924 | 275 (84) | n/a | ||
| 1924–1973 | Equitable Building | 318 (97) | 19 | |
| 1973–1975 | Financial Center | 345 (105) | 25 | |
| 1975–1991 | Ruan Center | 460 (140) | 36 | |
| 1991–Present | 801 Grand | 630 (192) | 45 |
There does not seem to have been any effort to document the tallest building in Iowa prior to the construction of the State Capitol in 1884. This list shows buildings which may have been the tallest in Iowa prior to 1884, excluding church steeples.
| Years as Tallest | Name | Heightft (m) | Floors | |
|---|---|---|---|---|
| 1840–1856 | Old Capitol, Iowa City | 114 (35) | n/a | |
| 1856–1884 | Shot Tower, Dubuque | 120 (37) | 10 |
Other early tall building include: