Exhibit 23

CONSENT OF INDEPENDENT REGISTERED PUBLIC ACCOUNTING FIRM

We consent to the incorporation by reference in the following Registration Statements, as listed below, of Capital One Financial Corporation and in the related Prospectus, where applicable, of our reports dated February 20, 2020, with respect to the consolidated financial statements of Capital One Financial Corporation and the effectiveness of internal control over financial reporting of Capital One Financial Corporation, included in this Annual Report (Form 10-K) of Capital One Financial Corporation for the year ended December 31, 2019.

Registration Statement Number		Form		Description
033-99748		Form S-3		Dividend Reinvestment and Stock Purchase Plan
333-97125		Form S-3		Dividend Reinvestment and Stock Purchase Plan
033-86986		Form S-8		1994 Stock Incentive Plan
033-91790		Form S-8		1995 Non-Employee Directors Stock Incentive Plan
033-97032		Form S-8		Amendment to 1994 Stock Incentive Plan
333-42853		Form S-8		1994 Stock Incentive Plan - 1997 Special Option Program
333-45453		Form S-8		Associate Savings Plan
333-51637		Form S-8		1994 Stock Incentive Plan
333-51639		Form S-8		1994 Stock Incentive Plan - Tier 5 Special Option Program
333-57317		Form S-8		1994 Stock Incentive Plan - 1998 Special Option Program
333-70305		Form S-8		1994 Stock Incentive Plan - Supplemental Special Option Program
333-78067		Form S-8		1994 Stock Incentive Plan
333-78383		Form S-8		1994 Stock Incentive Plan - 1999 Performance-Based Option Program and Supplemental Special Option Program
333-78609		Form S-8		1999 Stock Incentive Plan
333-78635		Form S-8		1999 Non-Employee Directors Stock Incentive Plan
333-84693		Form S-8		1994 Stock Incentive Plan - Supplemental Special Option Program
333-91327		Form S-8		1994 Stock Incentive Plan - Supplemental Special Option Program
333-92345		Form S-8		1994 Stock Incentive Plan
333-43288		Form S-8		1994 Stock Incentive Plan
333-58628		Form S-8		1994 Stock Incentive Plan
333-72788		Form S-8		1994 Stock Incentive Plan - 2001 Performance-Based Option Program
333-72820		Form S-8		1999 Non-Employee Directors Stock Incentive Plan
333-72822		Form S-8		1994 Stock Incentive Plan
333-76726		Form S-8		1994 Stock Incentive Plan - 2001 Performance-Based Option Program
333-97123		Form S-8		2002 Non-Executive Officer Stock Incentive Plan
333-97127		Form S-8		Associate Savings Plan as Amended and Restated
333-100488		Form S-8		2002 Associate Stock Purchase Plan
333-117920		Form S-8		2004 Stock Incentive Plan
333-124428		Form S-8		Plans of Hibernia Corporation
333-136281		Form S-8		2004 Stock Incentive Plan
333-133665		Form S-8		Plans of North Fork Bancorporation
333-151325		Form S-8		Amended and Restated Associate Stock Purchase Plan
333-158664		Form S-8		Second Amended and Restated 2004 Stock Incentive Plan
333-181736		Form S-8		Amended and Restated 2002 Associate Stock Purchase Plan
333-193683		Form S-8		Associate Savings Plan as Amended and Restated
333-195677		Form S-8		Third Amended and Restated 2004 Stock Incentive Plan
333-219570		Form S-8		Amended and Restated 2002 Associate Stock Purchase Plan

Registration Statement Number		Form		Description
333-223608		Form S-3		Senior Debt Securities, Subordinated Debt Securities, Preferred Stock, Depositary Shares, Common Stock, Purchase Contracts, Warrants, Units
333-232907		Form S-8		Associate Savings Plan as Amended and Restated

/s/ Ernst & Young LLP

Tysons, Virginia

February 20, 2020