# National Register of Historic Places listings in Mahaska County, Iowa

This is a list of the National Register of Historic Places listings in Mahaska County, Iowa.
This is intended to be a complete list of the properties and districts on the National Register of Historic Places in Mahaska County, Iowa, United States. Latitude and longitude coordinates are provided for many National Register properties and districts; these locations may be seen together in a map.
There are 49 properties and districts listed on the National Register in the county.
This National Park Service list is complete through NPS recent listings posted February 28, 2025.
Download coordinates as:
* KML
* GPX (all coordinates)
* GPX (primary coordinates)
* GPX (secondary coordinates)

## Current listings

| | Name on the Register | Image | Date listed | Location | City or town |
| 1 | Carroll Alsop House | Carroll Alsop House | November 9, 1988 (#88002142) | 1907 A Ave., E. 41°17′49″N 92°37′21″W﻿ / ﻿41.296944°N 92.6225°W﻿ / 41.296944; -92.6225﻿ (Carroll Alsop House) | Oskaloosa |
| 2 | Bellefountain Bridge | Bellefountain Bridge | May 15, 1998 (#98000506) | Ashland Ave. over the Des Moines River 41°19′58″N 92°51′56″W﻿ / ﻿41.332778°N 92.865556°W﻿ / 41.332778; -92.865556﻿ (Bellefountain Bridge) | Tracy |
| 3 | Dr. William E. and Ethel Rosenberger Berry House | Dr. William E. and Ethel Rosenberger Berry House | March 29, 1996 (#96000343) | 116 Rosenberger Ave. 41°18′22″N 92°38′46″W﻿ / ﻿41.306111°N 92.646111°W﻿ / 41.306111; -92.646111﻿ (Dr. William E. and Ethel Rosenberger Berry House) | Oskaloosa |
| 4 | Thomas J. Conover House | Thomas J. Conover House | March 28, 1996 (#96000342) | 1010 N. Market St. 41°18′14″N 92°38′39″W﻿ / ﻿41.303889°N 92.644167°W﻿ / 41.303889; -92.644167﻿ (Thomas J. Conover House) | Oskaloosa |
| 5 | Edmundson Park Historic District | Edmundson Park Historic District | September 27, 2007 (#07001005) | Junction of 11th Ave., W. and Edmundson Dr. 41°17′07″N 92°39′36″W﻿ / ﻿41.28524°N 92.65991°W﻿ / 41.28524; -92.65991﻿ (Edmundson Park Historic District) | Oskaloosa |
| 6 | Eveland Bridge | Eveland Bridge More images | May 15, 1998 (#98000504) | Fulton Ave. over the Des Moines River 41°14′34″N 92°45′24″W﻿ / ﻿41.242708°N 92.756528°W﻿ / 41.242708; -92.756528﻿ (Eveland Bridge) | Oskaloosa |
| 7 | Forest Cemetery Entrance | Forest Cemetery Entrance | December 13, 1991 (#91001765) | Junction of N. 9th St. and J Ave., E. 41°18′12″N 92°38′02″W﻿ / ﻿41.303333°N 92.633889°W﻿ / 41.303333; -92.633889﻿ (Forest Cemetery Entrance) | Oskaloosa |
| 8 | E.H. Gibbs House | Upload image | December 13, 1991 (#91001761) | William Penn University campus, N. Market Extension 41°18′31″N 92°38′41″W﻿ / ﻿41.308611°N 92.644722°W﻿ / 41.308611; -92.644722﻿ (E.H. Gibbs House) | Oskaloosa |
| 9 | Ulysses Simpson Grant Elementary School | Ulysses Simpson Grant Elementary School | December 10, 2008 (#08001163) | 715 B Ave., E. 41°17′50″N 92°38′16″W﻿ / ﻿41.29716°N 92.6378°W﻿ / 41.29716; -92.6378﻿ (Ulysses Simpson Grant Elementary School) | Oskaloosa |
| 10 | Phil Hoffman House | Phil Hoffman House | December 13, 1991 (#91001760) | 807 High Ave., E. 41°17′44″N 92°38′09″W﻿ / ﻿41.295556°N 92.635833°W﻿ / 41.295556; -92.635833﻿ (Phil Hoffman House) | Oskaloosa |
| 11 | Iowa Yearly Meeting House-College Avenue Friends Church | Iowa Yearly Meeting House-College Avenue Friends Church | March 29, 1996 (#96000344) | 912 N. C St. 41°18′12″N 92°38′53″W﻿ / ﻿41.303333°N 92.648056°W﻿ / 41.303333; -92.648056﻿ (Iowa Yearly Meeting House-College Avenue Friends Church) | Oskaloosa |
| 12 | William A. and Ida C. Johnson House | William A. and Ida C. Johnson House | March 28, 1996 (#96000346) | 307 College Ave. 41°18′14″N 92°38′50″W﻿ / ﻿41.303889°N 92.647222°W﻿ / 41.303889; -92.647222﻿ (William A. and Ida C. Johnson House) | Oskaloosa |
| 13 | Dr. William H. and Mae R. Klose House | Dr. William H. and Mae R. Klose House | March 29, 1996 (#96000350) | 1002 Penn Boulevard 41°18′23″N 92°38′51″W﻿ / ﻿41.306389°N 92.6475°W﻿ / 41.306389; -92.6475﻿ (Dr. William H. and Mae R. Klose House) | Oskaloosa |
| 14 | Lake Keomah State Park, Bathhouse-Lodge Area (Area A) | Upload image | November 15, 1990 (#90001666) | Off Iowa Highway 371 south of its junction with Iowa Highway 92 41°17′26″N 92°32′27″W﻿ / ﻿41.290556°N 92.540833°W﻿ / 41.290556; -92.540833﻿ (Lake Keomah State Park, Bathhouse-Lodge Area (Area A)) | Oskaloosa |
| 15 | Lake Keomah State Park, Erosion Control Area (Area B) | Upload image | November 15, 1990 (#90001667) | Off Iowa Highway 371 south of its junction with Iowa Highway 92 41°17′07″N 92°32′32″W﻿ / ﻿41.285278°N 92.542222°W﻿ / 41.285278; -92.542222﻿ (Lake Keomah State Park, Erosion Control Area (Area B)) | Oskaloosa |
| 16 | Jack Lamberson House | Jack Lamberson House | November 9, 1988 (#88002146) | 511 N. Park Ave. 41°18′01″N 92°37′37″W﻿ / ﻿41.300278°N 92.626944°W﻿ / 41.300278; -92.626944﻿ (Jack Lamberson House) | Oskaloosa |
| 17 | Lincoln School | Lincoln School | December 13, 1991 (#91001766) | 911 B Ave., W. 41°17′51″N 92°39′17″W﻿ / ﻿41.2975°N 92.654722°W﻿ / 41.2975; -92.654722﻿ (Lincoln School) | Oskaloosa |
| 18 | Mahaska County Courthouse | Mahaska County Courthouse More images | July 2, 1981 (#81000255) | Market St. and 2nd Ave. 41°17′42″N 92°38′35″W﻿ / ﻿41.295°N 92.643056°W﻿ / 41.295; -92.643056﻿ (Mahaska County Courthouse) | Oskaloosa |
| 19 | Maj. James W. McMullin House | Maj. James W. McMullin House | April 11, 1985 (#85000723) | 403 1st Ave., E. 41°17′40″N 92°38′26″W﻿ / ﻿41.294444°N 92.640556°W﻿ / 41.294444; -92.640556﻿ (Maj. James W. McMullin House) | Oskaloosa |
| 20 | W.A. McNeill House | W.A. McNeill House | October 21, 1999 (#99001267) | 1282 C Ave., E. 41°17′54″N 92°37′36″W﻿ / ﻿41.298333°N 92.626667°W﻿ / 41.298333; -92.626667﻿ (W.A. McNeill House) | Oskaloosa |
| 21 | Daniel Nelson House and Barn | Daniel Nelson House and Barn More images | November 20, 1974 (#74000798) | 2211 Nelson Lane 41°19′14″N 92°37′50″W﻿ / ﻿41.320556°N 92.630556°W﻿ / 41.320556; -92.630556﻿ (Daniel Nelson House and Barn) | Oskaloosa |
| 22 | North Skunk River Bridge | Upload image | May 15, 1998 (#98000503) | County Road G13 over the North Skunk River 41°29′41″N 92°38′00″W﻿ / ﻿41.494722°N 92.633333°W﻿ / 41.494722; -92.633333﻿ (North Skunk River Bridge) | New Sharon |
| 23 | Oskaloosa City Hall | Oskaloosa City Hall | December 13, 1991 (#91001764) | Northeastern corner of the junction of S. Market St. and 2nd Ave., E. 41°17′37″N 92°38′40″W﻿ / ﻿41.293611°N 92.644444°W﻿ / 41.293611; -92.644444﻿ (Oskaloosa City Hall) | Oskaloosa |
| 24 | Oskaloosa City Park and Band Stand | Oskaloosa City Park and Band Stand More images | July 28, 1983 (#83000389) | City Park 41°17′42″N 92°38′38″W﻿ / ﻿41.295°N 92.643889°W﻿ / 41.295; -92.643889﻿ (Oskaloosa City Park and Band Stand) | Oskaloosa |
| 25 | Oskaloosa City Square Commercial Historic District | Oskaloosa City Square Commercial Historic District More images | April 10, 1986 (#86000716) | Roughly bounded by A Ave., E, N. and S. 2nd St., 2nd Ave., E, and N. and S. A St. 41°17′48″N 92°38′39″W﻿ / ﻿41.296667°N 92.644167°W﻿ / 41.296667; -92.644167﻿ (Oskaloosa City Square Commercial Historic District) | Oskaloosa |
| 26 | Oskaloosa Fire Station | Oskaloosa Fire Station | December 13, 1991 (#91001763) | 109-111 2nd Ave., E. 41°17′37″N 92°38′39″W﻿ / ﻿41.293611°N 92.644167°W﻿ / 41.293611; -92.644167﻿ (Oskaloosa Fire Station) | Oskaloosa |
| 27 | Oskaloosa Monthly Meeting of Friends Parsonage | Oskaloosa Monthly Meeting of Friends Parsonage | March 29, 1996 (#96000348) | 910 N. C St. 41°18′10″N 92°38′53″W﻿ / ﻿41.302778°N 92.648056°W﻿ / 41.302778; -92.648056﻿ (Oskaloosa Monthly Meeting of Friends Parsonage) | Oskaloosa |
| 28 | Oskaloosa Post Office | Upload image | February 6, 2020 (#100004975) | 206 North Market St. 41°17′47″N 92°38′42″W﻿ / ﻿41.296473°N 92.644885°W﻿ / 41.296473; -92.644885﻿ (Oskaloosa Post Office) | Oskaloosa |
| 29 | Oskaloosa Public Library | Oskaloosa Public Library More images | December 13, 1991 (#83004763) | Southwestern corner of the junction of Market St. and 2nd Ave. 41°17′35″N 92°38′42″W﻿ / ﻿41.293056°N 92.645°W﻿ / 41.293056; -92.645﻿ (Oskaloosa Public Library) | Oskaloosa |
| 30 | Paradise Block Historic District | Paradise Block Historic District More images | December 13, 1991 (#91001767) | 402, 406, 408, 410, 414, 418, and 510-714 High Ave. E. 41°17′43″N 92°38′18″W﻿ / ﻿41.295278°N 92.638333°W﻿ / 41.295278; -92.638333﻿ (Paradise Block Historic District) | Oskaloosa |
| 31 | Penn College Historic District | Penn College Historic District More images | April 4, 1996 (#96000391) | 201 Trueblood Ave. 41°18′32″N 92°38′47″W﻿ / ﻿41.308889°N 92.646389°W﻿ / 41.308889; -92.646389﻿ (Penn College Historic District) | Oskaloosa |
| 32 | Pierson-Betts House | Pierson-Betts House | March 28, 1996 (#96000347) | 815 Penn Boulevard 41°18′22″N 92°38′52″W﻿ / ﻿41.306111°N 92.647778°W﻿ / 41.306111; -92.647778﻿ (Pierson-Betts House) | Oskaloosa |
| 33 | President's Cottage | President's Cottage | March 28, 1996 (#96000340) | 425 College Ave. 41°18′13″N 92°39′00″W﻿ / ﻿41.303611°N 92.65°W﻿ / 41.303611; -92.65﻿ (President's Cottage) | Oskaloosa |
| 34 | Rock Island Passenger Depot | Rock Island Passenger Depot | October 30, 1989 (#89001780) | Rock Island Ave. between 1st and 2nd Sts. 41°17′21″N 92°38′34″W﻿ / ﻿41.289167°N 92.642778°W﻿ / 41.289167; -92.642778﻿ (Rock Island Passenger Depot) | Oskaloosa |
| 35 | Chuck and Emily Russell House | Upload image | January 29, 2025 (#100011414) | 211 Hillcrest Drive 41°17′51″N 92°37′32″W﻿ / ﻿41.297569°N 92.625447°W﻿ / 41.297569; -92.625447﻿ (Chuck and Emily Russell House) | Oskaloosa |
| 36 | Rose Hill Methodist Episcopal Church | Rose Hill Methodist Episcopal Church | April 11, 2003 (#03000201) | 304 Main St. 41°19′14″N 92°27′55″W﻿ / ﻿41.320556°N 92.465278°W﻿ / 41.320556; -92.465278﻿ (Rose Hill Methodist Episcopal Church) | Rose Hill |
| 37 | St. James Episcopal Church | St. James Episcopal Church | December 13, 1991 (#91001762) | Southwestern corner of the junction of 1st Ave. and S. 3rd St. 41°17′39″N 92°38′29″W﻿ / ﻿41.294167°N 92.641389°W﻿ / 41.294167; -92.641389﻿ (St. James Episcopal Church) | Oskaloosa |
| 38 | Seeberger-Loring-Kilburn House | Seeberger-Loring-Kilburn House | July 14, 1983 (#83000390) | 509 High Ave., E. 41°17′44″N 92°38′22″W﻿ / ﻿41.295556°N 92.639444°W﻿ / 41.295556; -92.639444﻿ (Seeberger-Loring-Kilburn House) | Oskaloosa |
| 39 | John H. Shoemake House | John H. Shoemake House | March 22, 1984 (#84001276) | 116 2nd Ave., W. 41°17′36″N 92°38′44″W﻿ / ﻿41.293333°N 92.645556°W﻿ / 41.293333; -92.645556﻿ (John H. Shoemake House) | Oskaloosa |
| 40 | Smith-Johnson House | Smith-Johnson House | November 9, 1977 (#77000538) | 713 High Ave., E. 41°17′44″N 92°38′13″W﻿ / ﻿41.295556°N 92.636944°W﻿ / 41.295556; -92.636944﻿ (Smith-Johnson House) | Oskaloosa |
| 41 | Spring Creek Friends Cemetery | Upload image | March 29, 1996 (#96000351) | Junction of Osburn Ave. and 235th St. 41°18′41″N 92°36′09″W﻿ / ﻿41.311389°N 92.6025°W﻿ / 41.311389; -92.6025﻿ (Spring Creek Friends Cemetery) | Oskaloosa |
| 42 | Spring Creek Meeting House-H Street Mission | Upload image | March 28, 1996 (#96000339) | 207 N. H St. 41°17′47″N 92°39′17″W﻿ / ﻿41.296389°N 92.654722°W﻿ / 41.296389; -92.654722﻿ (Spring Creek Meeting House-H Street Mission) | Oskaloosa |
| 43 | Spurgin Residence | Spurgin Residence | March 28, 1996 (#96000341) | 313 College Ave. 41°18′14″N 92°39′00″W﻿ / ﻿41.303889°N 92.65°W﻿ / 41.303889; -92.65﻿ (Spurgin Residence) | Oskaloosa |
| 44 | Stock Judging Pavilion | Stock Judging Pavilion | April 12, 1984 (#84001280) | Southern Iowa Fairgrounds 41°18′04″N 92°39′43″W﻿ / ﻿41.301111°N 92.661944°W﻿ / 41.301111; -92.661944﻿ (Stock Judging Pavilion) | Oskaloosa |
| 45 | Dr. Ella Stokes House | Dr. Ella Stokes House | March 29, 1996 (#96000349) | 416 W. College Hill Ave. 41°18′21″N 92°38′59″W﻿ / ﻿41.305833°N 92.649722°W﻿ / 41.305833; -92.649722﻿ (Dr. Ella Stokes House) | Oskaloosa |
| 46 | Prof. Edgar H. and Irene D. Stranahan House | Prof. Edgar H. and Irene D. Stranahan House | March 28, 1996 (#96000345) | 1001 Gurney St. 41°18′23″N 92°38′49″W﻿ / ﻿41.306389°N 92.646944°W﻿ / 41.306389; -92.646944﻿ (Prof. Edgar H. and Irene D. Stranahan House) | Oskaloosa |
| 47 | Vander Wilt Farmstead Historic District | Vander Wilt Farmstead Historic District | January 8, 2004 (#03001370) | 1345 Iowa Highway 163, Sec. 22, T26N, R17W, SW of NE 41°22′22″N 92°48′11″W﻿ / ﻿41.372778°N 92.803056°W﻿ / 41.372778; -92.803056﻿ (Vander Wilt Farmstead Historic District) | Leighton |
| 48 | Gary J. and Matilda Vermeer Farmstead | Upload image | July 23, 2018 (#100002682) | 1688 250th Ave. 41°24′35″N 92°52′16″W﻿ / ﻿41.4097°N 92.8710°W﻿ / 41.4097; -92.8710﻿ (Gary J. and Matilda Vermeer Farmstead) | Pella |
| 49 | John K. Voorhees House | John K. Voorhees House | March 5, 1982 (#82002632) | Northwest of Oskaloosa on Iowa Highway 163 41°23′09″N 92°49′22″W﻿ / ﻿41.385833°N 92.822778°W﻿ / 41.385833; -92.822778﻿ (John K. Voorhees House) | Oskaloosa |

## Former listings

One property was formerly listed but has been removed:
| | Name on the Register | Image | Date listed | Date removed | Location | City or town | Description |
| 1 | Bridge near New Sharon | Upload image | May 15, 1998 (#98000505) | September 10, 2008 | County Road G29 over drainage ditch | New Sharon vicinity | Bridge was replaced in 1994, four years before it was officially listed. |