[ 1] Landmark name Image Date designated[ 2] Location County Description 1 Amana Colonies Amana Colonies June 23, 1965 (#66000336 ) Middle Amana 41°47′59″N 91°55′15″W / 41.799722°N 91.920833°W /41.799722; -91.920833 (Amana Colonies ) Iowa Amana Villages community, historic and modern. 2 Blood Run Site Blood Run Site May 22, 1970 (#70000246 ) Granite, IA andShindler, SD 43°28′N 96°35′W / 43.47°N 96.58°W /43.47; -96.58 (Blood Run Site ) Lyon, IA andLincoln, SD Anarchaeological site , overlapping into South Dakota. 3 Davis Oriole Earthlodge Site Davis Oriole Earthlodge Site October 16, 2012 (#12001018 ) Glenwood 41°04′16″N 95°47′12″W / 41.071111°N 95.786667°W /41.071111; -95.786667 (Davis Oriole Earthlodge Site ) Mills A well-preserved Plains Indian lodgearchaeological site ; located inPony Creek Park 4 Grenville M. Dodge House Grenville M. Dodge House November 5, 1961 (#66000338 ) Council Bluffs 41°15′18″N 95°50′53″W / 41.25513°N 95.84813°W /41.25513; -95.84813 (Grenville M. Dodge House ) Pottawattamie Home of Civil War General and Union Pacific Chief EngineerGrenville Dodge . 5 Dubuque County Jail Dubuque County Jail May 28, 1987 (#72000473 ) Dubuque 42°30′06″N 90°39′53″W / 42.50154°N 90.66470°W /42.50154; -90.66470 (Dubuque County Jail ) Dubuque Example of the uncommonEgyptian Revival architectural style. 6 The Farm House The Farm House July 19, 1964 (#66000339 ) Ames 42°01′41″N 93°38′32″W / 42.02807°N 93.64222°W /42.02807; -93.64222 (The Farm House ) Story Home of agriculturistSeaman A. Knapp and of U.S. Secretary of AgricultureJames "Tama Jim" Wilson , oldest building onIowa State University campus. 7 Fort Des Moines Provisional Army Officer Training School Fort Des Moines Provisional Army Officer Training School May 30, 1974 (#74000805 ) Des Moines 41°31′36″N 93°36′55″W / 41.526606°N 93.615233°W /41.526606; -93.615233 (Fort Des Moines Provisional Army Officer Training School ) 41°31′36″N 93°36′55″W / 41.526606°N 93.615233°W /41.526606; -93.615233 (Fort Des Moines Provisional Army Officer Training School ) Polk Training site for black officers in World War I. 8 George M. Verity (towboat)George M. Verity (towboat)December 20, 1989 (#89002459 ) Keokuk 40°23′29″N 91°22′21″W / 40.39129°N 91.37250°W /40.39129; -91.37250 (George M. Verity (towboat) Lee One of three surviving steam-powered towboats in the United States, this ship pioneered on upper Mississippi in a certain way, leading to large private industry. 9 William P. Hepburn House William P. Hepburn House December 8, 1976 (#73000736 ) Clarinda 40°44′30″N 95°02′31″W / 40.741667°N 95.041806°W /40.741667; -95.041806 (William P. Hepburn House ) Page Home of eleven-term CongressmanWilliam B. Hepburn . 10 Reverend George B. Hitchcock House Reverend George B. Hitchcock House February 17, 2006 (#77000500 ) Lewis 41°18′12″N 95°06′12″W / 41.30325°N 95.103472°W /41.30325; -95.103472 (Reverend George B. Hitchcock House ) Cass Used as a "station" on theUnderground Railway . 11 Herbert Hoover Birthplace Herbert Hoover Birthplace June 23, 1965 (#66000110 ) West Branch 41°40′07″N 91°20′53″W / 41.668611°N 91.348056°W /41.668611; -91.348056 (Herbert Hoover Birthplace ) Cedar Two-room cottage birthplace ofHerbert Hoover , 31st U.S. President. 12 Indian Village Site (Witrock Area) Indian Village Site (Witrock Area) July 19, 1964 (#66000888 ) Sutherland 42°58′50″N 95°25′22″W / 42.98055556°N 95.42277778°W /42.98055556; -95.42277778 (Indian Village Site (Witrock Area) ) O'Brien Anarchaeological site . 13 Kimball Village Site Kimball Village Site December 23, 2016 (#100000835 ) Westfield Plymouth Late Prehistoric Plains Village site. 14 Lone Star (towboat)Lone Star (towboat)December 20, 1989 (#89002461 ) LeClaire 41°35′54″N 90°20′33″W / 41.598303°N 90.342553°W /41.598303; -90.342553 (Lone Star (towboat) Scott Oldest of the three surviving steam-powered towboats in the United States. 15 Merchants' National Bank Merchants' National Bank January 7, 1976 (#76000804 ) Grinnell 41°44′32″N 92°43′33″W / 41.74229°N 92.72580°W /41.74229; -92.72580 (Merchants' National Bank ) Poweshiek Louis Sullivan -designed bank building on a corner in Grinnell.16 Julien Dubuque's Mines Julien Dubuque's Mines November 4, 1993 (#88002662 ) Dubuque 42°28′07″N 90°38′47″W / 42.468739°N 90.646311°W /42.468739; -90.646311 (Julien Dubuque's Mines ) Dubuque Historic district including Julien Dubuque Monument and archaeological sites relating to early lead mining in area.17 Old Capitol Old Capitol January 7, 1976 (#72000475 ) Iowa City 41°39′34″N 91°32′08″W / 41.65943°N 91.53565°W /41.65943; -91.53565 (Old Capitol ) Johnson It is one of the five-buildingPentacrest , another NRHP. 18 Phipps Site Upload image July 19, 1964 (#66000335 ) Cherokee Cherokee Anarchaeological site . 19 Pottawattamie County Jail and Sheriff’s Residence Pottawattamie County Jail and Sheriff’s Residence December 11, 2023 (#100009825 ) Council Bluffs 41°16′35″N 95°50′39″W / 41.276389°N 95.844167°W /41.276389; -95.844167 (Pottawattamie County Jail and Sheriff’s Residence ) Pottawattamie One of very few survivingrotary jails . 20 Reeve REA Power Generating Plant Reeve REA Power Generating Plant December 13, 2024 (#100011381 ) Rural Route 1 southwest of Hampton 42°41′14″N 93°13′58″W / 42.687222°N 93.232778°W /42.687222; -93.232778 (Reeve REA Power Generating Plant ) Franklin The first power plant west of the Mississippi River to generate electricity for rural areas. 21 Sergeant Floyd (towboat)Sergeant Floyd (towboat)May 5, 1989 (#89001079 ) Sioux City 42°29′28″N 96°25′07″W / 42.491175°N 96.418581°W /42.491175; -96.418581 (Sergeant Floyd (towboat) Woodbury Another of just 3 steam-powered towboats surviving. 22 Sergeant Floyd Monument Sergeant Floyd Monument June 30, 1960 (#66000340 ) Sioux City 42°27′38″N 96°22′39″W / 42.46068°N 96.37753°W /42.46068; -96.37753 (Sergeant Floyd Monument ) Woodbury Monument to the only member of the 1805Lewis and Clark Expedition who died during the trip. This is the firstNational Historic Landmark in the United States. 23 Surf Ballroom Surf Ballroom January 13, 2021 (#100006243 ) Clear Lake 43°08′24″N 93°23′23″W / 43.139916°N 93.389633°W /43.139916; -93.389633 (Surf Ballroom ) Cerro Gordo AHistoric Rock and Roll Landmark whereBuddy Holly ,Ritchie Valens , andJ. P. "The Big Bopper" Richardson gave their last performances on February 2, 1959, as part of the "Winter Dance Party Tour." They died the following day in a plane crash known colloquially as "The Day the Music Died ." 24 Terrace Hill Terrace Hill July 31, 2003 (#03001036 ) Des Moines 41°35′00″N 93°38′56″W / 41.583333°N 93.648889°W /41.583333; -93.648889 (Terrace Hill ) Polk Governor's mansion on hilltop in what is now downtown Des Moines. 25 Toolesboro Mound Group Toolesboro Mound Group May 23, 1966 (#66000337 ) Toolesboro 41°09′N 91°03′W / 41.15°N 91.05°W /41.15; -91.05 (Toolesboro Mound Group ) Louisa Mound site. 26 Van Allen and Company Department Store Van Allen and Company Department Store January 7, 1976 (#76000753 ) Clinton 41°50′28″N 90°11′18″W / 41.84121°N 90.18822°W /41.84121; -90.18822 (Van Allen and Company Department Store ) Clinton ALouis Sullivan -designed 4 story building, now apartments over commercial space. 27 James B. Weaver House James B. Weaver House May 15, 1975 (#75000680 ) Bloomfield 40°45′19″N 92°24′45″W / 40.755333°N 92.412611°W /40.755333; -92.412611 (James B. Weaver House ) Davis Home of Congressman and presidential candidateJames Weaver . 28 William M. Black (dredge)William M. Black (dredge)April 27, 1992 (#82002618 ) Dubuque 42°29′43″N 90°39′44″W / 42.495410°N 90.662156°W /42.495410; -90.662156 (William M. Black (dredge) Dubuque Sidewheeldredge operated by U.S. Corps of Engineers. 29 Woodbury County Courthouse Woodbury County Courthouse June 19, 1996 (#73000744 ) Sioux City 42°29′50″N 96°24′20″W / 42.497158°N 96.405525°W /42.497158; -96.405525 (Woodbury County Courthouse ) Woodbury One of finestPrairie School buildings in the United States. 
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