Exhibit 23.1 CONSENT OF INDEPENDENT ACCOUNTANTS We hereby consent to the incorporation by reference in the Registration Statement on Form S-2 (No. 33-61049) and Form S-8 (No. 333-48233, No. 333-36258, No. 333-55729, No. 33-35247 and No. 33-62734) of The Jones Financial Companies, L.L.L.P. of our report dated March 27, 2003 relating to the financial statements and financial statement schedules, which appears in this Form 10-K. St. Louis, Missouri March 27, 2003