<PAGE>


                                   Exhibit 21

                       SUBSIDIARIES OF TRC COMPANIES, INC.

Listed below are the subsidiaries which are included in the consolidated
financial statements of TRC Companies, Inc. Inactive subsidiaries are excluded.

<TABLE>
<CAPTION>

                                                                                     PERCENT OF
                                                                                    VOTING STOCK
NAME OF SUBSIDIARY AND JURISDICTION IN WHICH INCORPORATED OR ORGANIZED           OWNED BY REGISTRANT
<S>                                                                              <C>
TRC Alton Geoscience, Inc. (incorporated in California)                                 100%

TRC Environmental Corporation (incorporated in Connecticut)                             100%

TRC Environmental Solutions, Inc. (incorporated in California)                          100%

TRC Mariah Associates, Inc. (incorporated in Wyoming)                                   100%

TRC Engineers, Inc. (incorporated in New Jersey)                                        100%

TRC Garrow Associates, Inc. (incorporated in Georgia)                                   100%

TRC North American Weather Consultants (incorporated in Utah),                          100%
 a subsidiary of TRC Environmental Corporation

TRC Vectre Corporation (incorporated in New Jersey)                                     100%

Hunter Associates, Inc. (incorporated in Nevada)                                        100%

Lowney Associates (incorporated in California)                                          100%

Metuchen Realty Acquisition, LLC (formed in New Jersey)                                  50%

</TABLE>



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