Exhibit 23.1 CONSENT OF INDEPENDENT PUBLIC ACCOUNTANTS As independent public accountants, we hereby consent to the incorporation of our reports included in this Form 10-K, into The Jones Financial Companies, L.L.L.P.'s previously filed Form S-2 Registration Statement File No. 33-61049 and Form S-8 Registration Statements File No. 333-48233, No. 333-36258, 333-55729, No. 33-35247 and No. 33-62734. ARTHUR ANDERSEN LLP St. Louis, Missouri March 29, 2001 53