| Name | What | Region | Country | Lat | Long | Elev ft. | Pop est |
|---|---|---|---|---|---|---|---|
| Dahlonega | city | Iowa | United States | 41.06 | -92.37 | 849 | |
| Dairyville | city | Iowa | United States | 42.48 | -92.65 | 980 | |
| Dakota City | city | Iowa | United States | 42.72 | -94.20 | 1151 | |
| Dakota Mobile Home Park | city | Iowa | United States | 41.72 | -91.75 | 830 | |
| Dakotaurbo | city | Iowa | United States | 42.72 | -94.20 | 1151 | |
| Dalby | city | Iowa | United States | 43.26 | -91.27 | 1213 | |
| Dale | city | Iowa | United States | 41.60 | -94.34 | 1049 | |
| Dales Ford | city | Iowa | United States | 42.21 | -91.07 | 830 | |
| Dallas Center | city | Iowa | United States | 41.68 | -93.96 | 1049 | |
| Dana | city | Iowa | United States | 42.11 | -94.24 | 1125 | |
| Danbury | city | Iowa | United States | 42.23 | -95.72 | 1161 | |
| Danville | city | Iowa | United States | 40.86 | -91.31 | 830 | |
| Danville Center | city | Iowa | United States | 40.86 | -91.31 | 830 | |
| Darbyville | city | Iowa | United States | 40.82 | -92.87 | 889 | |
| Davenport | city | Iowa | United States | 41.52 | -90.58 | 830 | |
| Davis City | city | Iowa | United States | 40.64 | -93.81 | 905 | |
| Davis Corners | city | Iowa | United States | 43.37 | -92.30 | 1669 | |
| Dawson | city | Iowa | United States | 41.84 | -94.22 | 1007 | |
| Dayfield | city | Iowa | United States | 41.47 | -91.15 | 830 | |
| Dayton | city | Iowa | United States | 42.26 | -94.07 | 1099 | |
| Dayton | city | Iowa | United States | 41.85 | -92.19 | 830 | |
| Dayton (historical) | city | Iowa | United States | 40.73 | -94.93 | 1148 | |
| Daytonville | city | Iowa | United States | 41.48 | -91.83 | 830 | |
| De Moinas | city | Iowa | United States | 41.60 | -93.61 | 879 | |
| De Moins | city | Iowa | United States | 41.60 | -93.61 | 879 | |
| De Soto | city | Iowa | United States | 41.53 | -94.01 | 895 | |
| De Witt | city | Iowa | United States | 41.82 | -90.54 | 830 | |
| Dean | city | Iowa | United States | 40.63 | -92.71 | 830 | |
| Decatur City | city | Iowa | United States | 40.74 | -93.83 | 1115 | |
| Decorah | city | Iowa | United States | 43.30 | -91.79 | 925 | |
| Dedham | city | Iowa | United States | 41.91 | -94.82 | 1669 | |
| Deep River | city | Iowa | United States | 41.58 | -92.37 | 892 | |
| Deer Creek | city | Iowa | United States | 43.50 | -93.13 | 1230 | |
| Deerfield | city | Iowa | United States | 43.16 | -92.50 | 1167 | |
| Defiance | city | Iowa | United States | 41.82 | -95.34 | 1669 | |
| Delaware | city | Iowa | United States | 42.48 | -91.35 | 1049 | |
| Delhi | city | Iowa | United States | 42.43 | -91.33 | 1049 | |
| Delmar | city | Iowa | United States | 42.00 | -90.61 | 830 | |
| Deloit | city | Iowa | United States | 42.10 | -95.32 | 1249 | |
| Delphos | city | Iowa | United States | 40.66 | -94.34 | 1151 | |
| Delta | city | Iowa | United States | 41.32 | -92.33 | 830 | |
| Demoina | city | Iowa | United States | 41.60 | -93.61 | 879 | |
| Denhart | city | Iowa | United States | 42.97 | -93.87 | 1177 | |
| Denison | city | Iowa | United States | 42.02 | -95.36 | 1197 | |
| Denmark | city | Iowa | United States | 40.74 | -91.34 | 830 | |
| Denova | city | Iowa | United States | 40.91 | -91.64 | 830 | |
| Denver | city | Iowa | United States | 42.67 | -92.34 | 964 | |
| Depew | city | Iowa | United States | 43.18 | -94.54 | 1669 | |
| Derby | city | Iowa | United States | 40.93 | -93.46 | 1066 | |
| Des Moines | city | Iowa | United States | 41.60 | -93.61 | 879 | |
| Devils Glen Mobile Home Court | city | Iowa | United States | 41.54 | -90.47 | 830 | |
| Devon | city | Iowa | United States | 43.12 | -92.36 | 1207 | |
| Dewar | city | Iowa | United States | 42.53 | -92.22 | 928 | |
| Dewey | city | Iowa | United States | 41.19 | -94.76 | 1669 | |
| Dexter | city | Iowa | United States | 41.52 | -94.23 | 1135 | |
| Diagonal | city | Iowa | United States | 40.81 | -94.34 | 1092 | |
| Diamond | city | Iowa | United States | 40.76 | -92.97 | 902 | |
| Diamondhead Lake | city | Iowa | United States | 41.55 | -94.26 | 1099 | |
| Dickens | city | Iowa | United States | 43.13 | -95.02 | 1669 | |
| Dickieville | city | Iowa | United States | 41.00 | -94.90 | 1200 | |
| Dietrick Mobile Home Park | city | Iowa | United States | 42.47 | -92.45 | 948 | |
| Dike | city | Iowa | United States | 42.46 | -92.63 | 967 | |
| Dillon | city | Iowa | United States | 41.98 | -92.82 | 951 | |
| Dinsdale | city | Iowa | United States | 42.26 | -92.54 | 948 | |
| Dixie | city | Iowa | United States | 43.27 | -92.99 | 1171 | |
| Dixon | city | Iowa | United States | 41.74 | -90.78 | 830 | |
| Dodgeville | city | Iowa | United States | 40.94 | -91.18 | 830 | |
| Dolliver | city | Iowa | United States | 43.46 | -94.63 | 1253 | |
| Donahue | city | Iowa | United States | 41.69 | -90.68 | 830 | |
| Donley Station (historical) | city | Iowa | United States | 41.33 | -93.18 | 830 | |
| Donnan | city | Iowa | United States | 42.90 | -91.88 | 1128 | |
| Donnelley | city | Iowa | United States | 41.33 | -93.18 | 830 | |
| Donnellson | city | Iowa | United States | 40.64 | -91.56 | 830 | |
| Doon | city | Iowa | United States | 43.28 | -96.23 | 1669 | |
| Dorchester | city | Iowa | United States | 43.47 | -91.51 | 928 | |
| Doris | city | Iowa | United States | 42.48 | -91.81 | 1003 | |
| Doubleday | city | Iowa | United States | 43.09 | -92.63 | 1099 | |
| Douds | city | Iowa | United States | 40.84 | -92.09 | 830 | |
| Dougherty | city | Iowa | United States | 42.92 | -93.04 | 1092 | |
| Douglass | city | Iowa | United States | 43.01 | -91.87 | 987 | |
| Dover | city | Iowa | United States | 41.85 | -92.29 | 830 | |
| Dover (historical) | city | Iowa | United States | 40.73 | -92.21 | 830 | |
| Dover Mills | city | Iowa | United States | 43.02 | -91.73 | 977 | |
| Dow City | city | Iowa | United States | 41.93 | -95.49 | 1210 | |
| Downers Grove | city | Iowa | United States | 42.24 | -91.28 | 951 | |
| Downey | city | Iowa | United States | 41.62 | -91.35 | 830 | |
| Dows | city | Iowa | United States | 42.66 | -93.50 | 1148 | |
| Drakesville | city | Iowa | United States | 40.80 | -92.48 | 853 | |
| Dresden | city | Iowa | United States | 42.98 | -92.32 | 1053 | |
| Dresden | city | Iowa | United States | 41.58 | -92.36 | 905 | |
| Drew | city | Iowa | United States | 42.85 | -93.81 | 1158 | |
| Dubuque | city | Iowa | United States | 42.50 | -90.66 | 830 | |
| Dudley | city | Iowa | United States | 41.09 | -92.59 | 830 | |
| Dumfries | city | Iowa | United States | 41.19 | -95.74 | 1174 | |
| Dumont | city | Iowa | United States | 42.75 | -92.98 | 1020 | |
| Dunbar | city | Iowa | United States | 41.94 | -92.80 | 948 | |
| Duncan | city | Iowa | United States | 43.10 | -93.71 | 1249 | |
| Duncombe | city | Iowa | United States | 42.47 | -93.99 | 1105 | |
| Dundee | city | Iowa | United States | 42.58 | -91.55 | 971 | |
| Dunkerton | city | Iowa | United States | 42.57 | -92.16 | 951 | |
| Dunlap | city | Iowa | United States | 41.85 | -95.60 | 1148 | |
| Dunnville (historical) | city | Iowa | United States | 40.83 | -92.38 | 843 | |
| Durango | city | Iowa | United States | 42.56 | -90.78 | 830 | |
| Durant | city | Iowa | United States | 41.60 | -90.91 | 830 | |
| Durham | city | Iowa | United States | 41.32 | -92.96 | 830 | |
| Dutchtown | city | Iowa | United States | 42.55 | -91.41 | 1030 | |
| Dyersville | city | Iowa | United States | 42.48 | -91.12 | 944 | |
| Dysart | city | Iowa | United States | 42.17 | -92.31 | 1000 |