| Saint John's UCC | Ackley, Iowa |
| New Horizons UCC | Akron, Iowa |
| First Congregational UCC | Algona, Iowa |
| Salem United Church of Christ | Alleman, Iowa |
| United Church of Christ Congregational | Ames, Iowa |
| First Congregational UCC | Anamosa, Iowa |
| United Church of Christ | Ankeny, Iowa |
| Bethany UCC | Baxter, Iowa |
| Congregational UCC | Baxter, Iowa |
| United Church of Christ Cong | Belmond, Iowa |
| Peace Church of Christ United - UCC | Bennett, Iowa |
| Congregational UCC | Blairsburg, Iowa |
| First United Church of Christ | Burlington, Iowa |
| Zion United Church of Christ | Burlington, Iowa |
| Saint Luke UCC | Burlington, Iowa |
| Zion United Church of Christ | Calumet, Iowa |
| United Church of Christ | Cedar Falls, Iowa |
| First Congregational UCC | Cedar Rapids, Iowa |
| United Church of Christ | Central City, Iowa |
| First Congregational UCC | Charles City, Iowa |
| Saint John's UCC | Clarence, Iowa |
| Congregational UCC | Clarion, Iowa |
| First UCC Pleasant Valley | Clarksville, Iowa |
| Immanuel UCC | Clarksville, Iowa |
| First Congregational UCC | Clinton, Iowa |
| Community Congregational UCC | Clinton, Iowa |
| United Church of Christ | Colwell, Iowa |
| Saint John's UCC | Council Bluffs, Iowa |
| Congregational UCC | Cromwell, Iowa |
| Congregational UCC | Danville, Iowa |
| Edwards Congregational UCC | Davenport, Iowa |
| Faith United Church of Christ | Davenport, Iowa |
| First Congregational UCC | De Witt, Iowa |
| Congregational UCC | Decorah, Iowa |
| Saint Paul UCC | Denver, Iowa |
| Saint Paul's UCC | Donnellson, Iowa |
| Summit Congregational UCC | Dubuque, Iowa |
| First Congregational UCC | Dubuque, Iowa |
| United Church of Christ | Eagle Grove, Iowa |
| Peace United Church of Christ | Elkader, Iowa |
| Congregational UCC | Farragut, Iowa |
| Saint John UCC | Fort Madison, Iowa |
| Saint Peter's UCC | Geneva, Iowa |
| Peace United Church of Christ | Gladbrook, Iowa |
| First Congregational UCC | Glenwood, Iowa |
| United Church of Christ | Green Mountain, Iowa |
| United Church of Christ Congregational | Grinnell, Iowa |
| Saint John's UCC | Griswold, Iowa |
| St. John's United Church of Christ Women's Fellowship | Griswold, Iowa |
| United Trinity Church | Hamburg, Iowa |
| Trinity UCC | Hartley, Iowa |
| Associated Church of Hawarden | Hawarden, Iowa |
| Hope United Church of Christ | Hiawatha, Iowa |
| Zion United Church of Christ | Hubbard, Iowa |
| Congregational UCC | Humboldt, Iowa |
| Crossroads United Church of Christ | Indianola, Iowa |
| Faith United Church of Christ | Iowa City, Iowa |
| Congregational UCC | Iowa City, Iowa |
| First Congregational UCC | Iowa Falls, Iowa |
| Saint Paul UCC | Keokuk, Iowa |
| Immanuel Reformed UCC | Klemme, Iowa |
| First Congregational UCC | Lake View, Iowa |
| United Church of Christ | Larchwood, Iowa |
| Immanuel UCC | Latimer, Iowa |
| Salem Church of Lincoln | Lincoln, Iowa |
| Saint Paul's UCC | Madrid, Iowa |
| Community Cong UCC | Manchester, Iowa |
| Congregational UCC | Manson, Iowa |
| Maquoketa United Church of Christ | Maquoketa, Iowa |
| Trinity UCC | Marengo, Iowa |
| First United Church of Christ | Marshalltown, Iowa |
| First Congregational UCC | Mc Gregor, Iowa |
| First Congregational UCC | Mitchellville, Iowa |
| Peace United Church of Christ | Monticello, Iowa |
| Faith United Church of Christ | Muscatine, Iowa |
| Saint John's UCC | Nashua, Iowa |
| Saint John's UCC | New Albin, Iowa |
| First Congregational UCC | Newell, Iowa |
| United Church of Christ | Olds, Iowa |
| United Church of Christ | Osage, Iowa |
| Saint Paul Congregational UCC | Oskaloosa, Iowa |
| Plymouth Congregational UCC | Ottumwa, Iowa |
| First Congregational United Church of Christ | Red Oak, Iowa |
| First Congregational UCC | Riceville, Iowa |
| Golden Congregational UCC | Ryan, Iowa |
| United Church of Christ | Schleswig, Iowa |
| First Congregational UCC | Sioux City, Iowa |
| Mayflower Congregational UCC | Sioux City, Iowa |
| Ripley United Church of Christ | Traer, Iowa |
| Faith United Church of Christ | Tripoli, Iowa |
| Urbandale UCC | Urbandale, Iowa |
| Peace United Church of Christ | Walnut, Iowa |
| First Congregational Church UCC | Waterloo, Iowa |
| Salem United Church of Christ | Waukon, Iowa |
| Zion United Church of Christ | Waukon, Iowa |
| Peace United Church of Christ | Waverly, Iowa |
| First Congregational UCC | Webster City, Iowa |
| Saint Paul's UCC | Wheatland, Iowa |
| First Congregational UCC | Whiting, Iowa |
| Grace United Church of Christ | Wilton, Iowa |
| Trinity UCC of Moscow | Wilton, Iowa |