Thomas Dixon (died July 25, 1886) was a Presbyterian architect born in Wilmington, Delaware and one of the founders of the Baltimore chapter of AIA. He was the father of minister Thomas Freeman Dixon, an 1893 graduate of Princeton Theological Seminary. He partnered with his brother, James M. Dixon, from 1851 until James's death in 1863. In 1871, he partnered with another well-known Baltimore architect Charles L. Carson for some time doing business from their offices at 117 Baltimore Street as Thomas Dixon and Charles L. Carson until sometime before 1877 when the partnership was dissolved. In 1827, he was elected Honorary Academician at the National Academy of Design.
- Mount Vernon Place United Methodist Church and Asbury House, North Charles Street and East Mount Vernon Place, (East Monument Street), opposite the Washington Monument, (1872), listed on the National Register of Historic Places (NRHP) in 1971.
- St. Stephen's Episcopal Church (Earleville, Maryland) (1870-1874), listed on the National Register of Historic Places in 1982.
- Aged Women's and Aged Men's Homes, now the Pickersgill Retirement Community, Towson, Maryland
- Dixon Hill neighborhood of Baltimore
- Centenary Methodist Episcopal Church, South, in St. Louis, Missouri, NRHP-listed in 1996
- Lesley-Travers Mansion in New Castle, Delaware
- Grand Opera House in Wilmington, Delaware
- Baltimore County Circuit Courthouse, at Towson, Maryland, 1854.
- Episcopal Church of the Ascension, 1215 Massachusetts Avenue, N.W., Washington, D.C. (Dixon,Thomas), NRHP-listed
- Grace United Methodist Church, 9th and West Streets, Wilmington, Delaware (Dixon,Thomas,Esq.), NRHP-listed
- Sheppard and Enoch Pratt Hospital and Gatehouse, (North) Charles Street Avenue, Towson, Maryland, Baltimore County, (Dixon,Thomas & James M.), NRHP-listed
- St. Mary's Episcopal Church/Woodlawn, 5610 Dogwood Road, Woodlawn, Maryland, Baltimore County, (Dixon & Carson), NRHP-listed
- The Late Thomas Dixon, The Sun (1837-1985); Jul 27, 1886; ProQuest Historical Newspapers The Baltimore Sun (1837-1985) pg. 4
- American Institute of Architects and Engineers, The Sun (1837-1985); Nov 15, 1875; ProQuest Historical Newspapers The Baltimore Sun (1837-1985)
- Wollon, James T. (March 11, 2010). "Thomas Dixon". Baltimore Architecture Foundation.
- Changes In Business Firms, The Sun (1837-1985); Jan 3, 1871; ProQuest Historical Newspapers The Baltimore Sun (1837-1985) pg. 4
- The Obituary Record: Charles L. Carson The Well Known Architect, The Sun (1837-1985); Dec 19, 1891; ProQuest Historical Newspapers The Baltimore Sun (1837-1985) pg. 8
- Death Of Mrs. R.H. Dixon, The Sun (1837-1985); Apr 28, 1898; ProQuest Historical Newspapers "The Baltimore Sun" (1837-1985) pg. 8
- Died, The Sun (1837-1985); Jul 27, 1886; ProQuest Historical Newspapers The Baltimore Sun (1837-1985) pg. 2
- "National Register Information System". National Register of Historic Places. National Park Service. April 15, 2008.
- The Architecture of Baltimore an Illustrated History, Hayward & Shivers, 2004 ISBN 0-8018-7806-3, p. 142
- Baltimore County Panorama, Brooks & Parsons, ISBN 0-937076-03-1, p. 29