| Name | Location |
| Agency United Methodist Church | Agency |
| Albia Road Southern Baptist Church | Ottumwa North |
| Alpine Log Church | Agency |
| Apostolic Church of Christ | Ottumwa North |
| Assembly of God Church | Eldon |
| Bethany Baptist Church | Ottumwa North |
| Bethel United Pentecostal Church | Ottumwa North |
| Bible Baptist Church | Ottumwa South |
| Bladensburg Christian Church | Abingdon |
| Blakesburg Christian Church | Blakesburg |
| Blakesburg Methodist Church | Blakesburg |
| Calvary Baptist Church | Ottumwa North |
| Calvary Open Bible Church | Ottumwa North |
| Christian Church | Eldon |
| Christianburg Church | Chillicothe |
| Church of God Prophecy | Ottumwa North |
| Church of Jesus Christ Ottumwa | Ottumwa North |
| Church of the Brethren | Ottumwa South |
| Columbia Church | Chillicothe |
| Cornerstone Community Church | Ottumwa North |
| Davis Street Christian Church | Ottumwa North |
| Des Moines Church | Eldon |
| Dove Ministries Church | Ottumwa South |
| East End Christian Church | Ottumwa North |
| East End Pentecostal Church | Ottumwa North |
| East End Presbyterian Church | Ottumwa North |
| Eldon First Baptist Church | Eldon |
| Eldon United Methodist Church | Eldon |
| Evangelistic Foursquare Church | Ottumwa North |
| Faith Baptist Church | Unknown |
| First Assembly of God Church | Ottumwa North |
| First Baptist Church | Ottumwa North |
| First Christian Church | Ottumwa North |
| First Church - Open Bible | Ottumwa North |
| First Church of Christ Science | Ottumwa North |
| First Church of God | Ottumwa North |
| First Church of the Nazarene | Ottumwa North |
| First Church of the Open Bible | Ottumwa North |
| First Foursquare Church | Ottumwa North |
| First Lutheran Church | Ottumwa North |
| First Pentecostal Assembly of God Church | Ottumwa North |
| First Presbyterian Church | Ottumwa North |
| Hickory Grove Community Church | Unknown |
| High Point Foursquare Gospel Church | Ottumwa North |
| Hopewell Church | Blakesburg NE |
| Living Hope Bible Church | Eldon |
| Mars Hill Church | Agency |
| Mount Zion Church | Blakesburg NE |
| Munterville Lutheran Church | Chillicothe |
| New Hope Baptist Church | Ottumwa North |
| New Life Church | Ottumwa North |
| New Life Family Church | Agency |
| North Court Baptist Church | Ottumwa North |
| Northgate Alliance Church | Ottumwa North |
| Ottumwa Church of Christ | Ottumwa North |
| Ottumwa Community Church | Ottumwa North |
| Penn Avenue Free Methodist Church | Ottumwa North |
| Pickwick Church of Christ | Ottumwa South |
| Pleasant Home Church | Blakesburg NE |
| Plymouth Congergational United Church | Ottumwa North |
| Primitive Baptist Church | Eldon |
| Riverside United Methodist Church | Ottumwa North |
| Saint Marys Catholic Church | Ottumwa North |
| Saint Patricks Catholic Church | Ottumwa North |
| Saint Paul Lutheran Church | Ottumwa North |
| Savannah Church of Christ | Ottumwa North |
| Second Baptist Church | Ottumwa North |
| Seventh Day Adventist Church | Ottumwa North |
| The Church of Jesus Christ of Latter Day Saints | Ottumwa North |
| Trinity Church of the Nazarene | Ottumwa North |
| Trinity Episcopal Church | Ottumwa North |
| Trinity Lutheran Church | Ottumwa South |
| Wesley United Methodist Church | Ottumwa North |
| Westminster Presbyterian Church | Ottumwa North |
| Wildwood Evangelical Free Church | Ottumwa North |
| Zion Church | Ottumwa South |
| Zion Community Church of God | Ottumwa South |
Source: GNIS
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