CERTIFICATIONS PURSUANT TO SECTION 906 OF THE
                          SARBANES-OXLEY ACT OF 2002

David P. Butler and Gerard K. O'Reilly, Co-Principal Executive Officers, and
Gregory K. Hinkle, Principal Financial Officer, of The DFA Investment Trust
Company, a Delaware statutory trust (the "Registrant"), each certify that:

    1. The Registrant's periodic report on Form N-CSR for the period ended
       April 30, 2019 (the "Report") fully complies with the requirements of
       Section 13(a) or Section 15(d) of the Securities Exchange Act of 1934,
       as amended, as applicable; and

    2. The information contained in the Report fairly presents, in all material
       respects, the financial condition and results of operations of the
       Registrant.

By:    /s/ David P. Butler
       --------------------------------
       David P. Butler
       Co-Principal Executive Officer
       The DFA Investment Trust Company

Date:  July 5, 2019

By:    /s/ Gerard K. O'Reilly
       --------------------------------
       Gerard K. O'Reilly
       Co-Principal Executive Officer
       The DFA Investment Trust Company

Date:  July 5, 2019

By:    /s/ Gregory K. Hinkle
       --------------------------------
       Gregory K. Hinkle
       Principal Financial Officer
       The DFA Investment Trust Company

Date:  July 5, 2019