1

                                                                    Exhibit 23.1


                CONSENT OF INDEPENDENT CERTIFIED PUBLIC ACCOUNTS



To Foothill Independent Bancorp:


         We consent to the incorporation by reference in Registration Statement
No. 2-89744 on Form S-8 filed March 1, 1984, Registration Statement No. 33-57586
on Form S-8 filed January 29, 1993, and Registration Statement No. 33-83854 on
Form S-3 filed September 12, 1994, of our report dated January 22, 1999 on the
consolidated financial statements of Foothill Independent Bancorp as of December
31, 1998 and 1997 and for each of the three years in the period ended December
31, 1998 included at Page 37 of its Annual Report on Form 10-K for the year
ended December 31, 1998.


                                              /s/ VAVRINEK, TRINE, DAY & COMPANY
                                              ----------------------------------
                                                  VAVRINEK, TRINE, DAY & COMPANY
                                                  Certified Public Accountants

March 23, 1999
Rancho Cucamonga, California