Union Church may refer to:

• Greek Catholic Church

• Union Church (Australia), a building maintained by a local trust and available to multiple denominations

• Union Church, Hong Kong
• Union Church (Shanghai)

• Union Church of Santo Domingo

(by state then city)

• Union Church and School (Paris, Arkansas), listed on the National Register of Historic Places (NRHP)
• Union Church of Dunnigan, California, listed on the NRHP
• Sterling Union Pacific Railroad Depot, Sterling, Colorado, listed on the NRHP in Colorado
• Union Church/St. Paul's Church, Riverton, Connecticut, listed on the NRHP
• Jensen Union Church, Jensen Beach, Florida, now Jensen Beach Christian Church
• Makawao Union Church, Paia, Hawaii, listed on the NRHP
• Union Church (Oreana, Illinois), listed on the NRHP
• Old Union Church and Cemetery (Alfordsville, Indiana), listed on the NRHP in Indiana
• Union Church (Davis City, Iowa), listed on the NRHP
• Union Church (Sibley, Louisiana), listed on the NRHP
• Union Church (Buckfield, Maine), listed on the NRHP
• Union Church (Columbia Falls, Maine), listed on the NRHP
• Union Church (Durham, Maine), listed on the NRHP
• Columbia Union Church, Epping, Maine, listed on the NRHP
• Jonesboro Union Church, Jonesboro, Maine, listed on the NRHP
• Union Church (Naples, Maine), listed on the NRHP
• Union Church (North Harpswell, Maine), listed on the NRHP
• Union Church of Northeast Harbor, Maine, listed on the NRHP
• Union Church (Phillips, Maine), listed on the NRHP
• Union Church (Round Pond, Maine), listed on the NRHP
• Stetson Union Church, Stetson, Maine, listed on the NRHP
• Union Church of Vinalhaven, Maine, listed on the NRHP
• Union Church (Wiscasset, Maine), determined to be the smallest church in the world from 1958 until 1990
• South Swansea Union Church, now South Swansea Baptist Church, Swansea, Massachusetts, listed on the NRHP
• Greenwood Union Church, Wakefield, Massachusetts, listed on the NRHP
• South Berrien Center Union Church and Cemetery, Berrien, Michigan, listed on the NRHP
• Sherman City Union Church, Sherman City, Michigan, listed on the NRHP
• People's Union Church, Scambler Township, Minnesota, listed on the NRHP
• Union Church Presbyterian Church (Union Church, Mississippi), listed on the NRHP in Mississippi
• Northfield Union Church, Northfield, New Hampshire, listed on the NRHP
• Union Church (South Wolfeboro, New Hampshire), listed on the NRHP
• Stark Union Church, Stark, New Hampshire, listed on the NRHP
• First Union Protestant Church of Mountain View, Bellmont, New York, listed on the NRHP
• Foothills Baptist Church (Essex, New York), formerly known as Union Church at Boquet Chapel, listed on the NRHP
• Hamilton Union Church Rectory, Guilderland, New York, listed on the NRHP
• Union Church of Pocantico Hills, Pocantico Hills, New York, listed on the NRHP
• Stone Mills Union Church, Stone Mills, New York, listed on the NRHP
• Grace Union Church and Cemetery, Blackburn, North Carolina, listed on the NRHP
• Salem Union Church and Cemetery, Maiden, North Carolina, listed on the NRHP
• Berea Union Depot, Berea, Ohio, listed on the NRHP
• Union Church (Kipton, Ohio), listed on the NRHP
• Bellman's Union Church, Centerport, Pennsylvania, listed on the NRHP in Pennsylvania
• Chestnut Ridge and Schellsburg Union Church and Cemetery, Napier Township, Pennsylvania, listed on the NRHP
• Union Church and Burial Ground, Philipsburg, Pennsylvania, listed on the NRHP
• St. Paul's Union Church and Cemetery, Ringtown, Pennsylvania, listed on the NRHP
• Union Church (Portsmouth, Rhode Island), listed on the NRHP
• Highland Chapel Union Church, Ridgetop, Tennessee, listed on the NRHP
• Big Spring Union Church, Springdale, Tennessee, listed on the NRHP
• Fletcher Union Church, Fletcher, Vermont, listed on the NRHP
• Union Church (New Haven, Vermont), listed on the NRHP
• Beaver Meadow Union Chapel, Norwich, Vermont, listed on the NRHP
• Earlysville Union Church, Earlysville, Virginia, listed on the NRHP

United States

• Union Church, Alabama
• Union Church, Mississippi
• Union Church, Wisconsin

• Union Baptist Church (disambiguation)
• Union Cemetery (disambiguation)
• Union Chapel (disambiguation)
• Union Congregational Church (disambiguation)
• Union Episcopal Church (disambiguation)
• Union Meetinghouse (disambiguation)
• Union Presbyterian Church (disambiguation)