Iowa - Constructed - 1850–1859
| Albright, Henry D. and Juliana (Wortz), House |
| Bauman, Augustus and Elizabeth (Huntsberger), House |
| Bevington, C. D. and Eliza Heath, Privy |
| Big Mill Homestead |
| Bostick, William, House |
| Braska House |
| Butterworth, Nathaniel, House |
| Camp Harlan-Camp McKean Historic District |
| Concord Congregational Cemetery |
| Cretsinger, John, House |
| DeFries House, Barn and Carpenter Shop |
| Dominy, John S., House |
| Dyas, George, House |
| Franklin Printing House |
| Green, William, House |
| Hall, Hannah Morse Fowler, House |
| House at 111 E. Maple Street |
| Jagger-Churchill House |
| Kellogg, Miles and Elizabeth Smith, House |
| Knott, Adams R., Frederick L. and Martha (Taylor), House |
| LeClaire, Antoine, House |
| """Lockkeeper's"" House" |
| McElhinny House |
| Minor, Josias L. and Elizabeth A., Farmstead District |
| Mount Saint Bernard Seminary and Barn |
| Nelson, Daniel, House and Barn |
| Nicking House |
| Nishnabotna Ferry House |
| Oakes-Wood House |
| Oakland Cemetery |
| Old Lenox College |
| Perham House |
| Richardson-Jakway House |
| Roling, Henry, House |
| Schindhelm-Drews House |
| Schrup, John and Marie (Palen) Farmstead Historic District |
| Shoemake, John H., House |
| Smith, Henry H./J.H. Murphy House |
| Smith, James J. and Anna J. (Linean), House #1 |
| Smith-Johnson House |
| Spirit Lake Massacre Log Cabin |
| St. Patrick's Church-Garryowen |
| St. Peters United Evangelical Lutheran Church |
| Taubman, Henry, House |
| Troy Academy |
| Vawter, J. G. and Elizabeth S., House |
| Waln, Elijah D. and Mary J. (Adams), House |
| Warde, J. C. B., House |
| Wartburg College Historic District |
| Wilds, Col. John Q. and Rowena (Camp), House |
| Wilson, US Senator James F., House |
| Windrem House |
Data from United States Park Service and Wikidata
