| Bethel UCC | Arlington, Virginia |
| Rock Spring Congregational UCC | Arlington, Virginia |
| First & Saint Stephen's UCC | Baltimore, Maryland |
| Heritage UCC | Baltimore, Maryland |
| Locust Point Community UCC | Baltimore, Maryland |
| Saint Mark's UCC | Baltimore, Maryland |
| Bethesda UCC | Bethesda, Maryland |
| Trinity Reformed UCC | Boonsboro, Maryland |
| Bethlehem UCC | Broadway, Virginia |
| Community Church UCC | Brookside, New Jersey |
| Immanuel UCC | Cambridge, Maryland |
| Immanuel UCC | Catonsville, Maryland |
| Community Church of Cedar Grove UCC | Cedar Grove, New Jersey |
| Wellspring UCC | Centreville, Virginia |
| Stanley Congregational UCC | Chatham, New Jersey |
| First Congregational Christian Church UCC | Chesterfield, Virginia |
| Saint John's UCC | Clear Spring, Maryland |
| The People's Church of Dover UCC | Dover, Delaware |
| The United Church of Christ of Annapolis | Edgewater, Maryland |
| Saint John's UCC | Edinburg, Virginia |
| Church of the Incarnation UCC | Emmitsburg, Maryland |
| Grace UCC | Flemington, New Jersey |
| Evangelical Reformed Church | Frederick, Maryland |
| Grace Trinity UCC | Frederick, Maryland |
| Grace UCC | Frederick, Maryland |
| United Church of Christ of Fredericksburg | Fredericksburg, Virginia |
| Bethlehem UCC | Glassboro, New Jersey |
| Greenbelt Community Church, United Church of Christ | Greenbelt, Maryland |
| Church of the Holy Trinity UCC | Hagerstown, Maryland |
| Zion Reformed UCC | Hagerstown, Maryland |
| Saint Stephen's UCC | Harrisonburg, Virginia |
| Sanctuary UCC | Harrisonburg, Virginia |
| Community UCC | Hasbrouck Heights, New Jersey |
| First Congregational UCC | Haworth, New Jersey |
| Jefferson UCC | Jefferson, Maryland |
| Grace Reformed UCC | Kearneysville, West Virginia |
| Mount Vernon Reformed UCC | Keedysville, Maryland |
| Grace United Church of Christ | Keysville, Maryland |
| Lazarus UCC | Lineboro, Maryland |
| Leaksville UCC | Luray, Virginia |
| Trinity UCC | Manchester, Maryland |
| Congregational UCC | Maple Shade, New Jersey |
| Christ Reformed UCC | Middletown, Maryland |
| Safe Harbor UCC | Milton, Delaware |
| Union Congregational UCC | Montclair, New Jersey |
| Grace UCC | Mount Jackson, Virginia |
| New Ark Church UCC | Newark, Deleware |
| First Congregational UCC | Park Ridge, New Jersey |
| First Congregational Church of River Edge UCC | River Edge, New Jersey |
| Rockville United Church of Christ | Rockville, Maryland |
| Congregational UCC | Rutherford, New Jersey |
| Christ Reformed UCC | Sharpsburg, Maryland |
| Christ Congregational UCC | Silver Spring, Maryland |
| Grace UCC | Taneytown, Maryland |
| Apples UCC | Thurmont, Maryland |
| Trinity UCC | Thurmont, Maryland |
| Saint Luke's UCC | Timberville, Virginia |
| United Church of Christ | Toms River, New Jersey |
| First Congregational Church UCC | Verona, New Jersey |
| Emmaus UCC | Vienna, Virginia |
| Glade UCC | Walkersville, Maryland |
| Trinity United Church UCC | Warren, New Jersey |
| Cleveland Park Congregational UCC | Washington, DC |
| Faith UCC | Washington, DC |
| First Congregational UCC | Washington, DC |
| First Congregational Church | Westfield, New Jersey |
| Emmanuel UCC | Westminster, Maryland |
| Saint Mary's UCC | Westminster, Maryland |
| Saint Matthew's UCC | Westminster, Maryland |
| St Paul's UCC | Westminster, Maryland |
| Pilgrim UCC | Wheaton, Maryland |
| Mount Calvary UCC | Woodstock, Virginia |
| Saint Paul's UCC | Woodstock, Virginia |