Exhibit 23.1
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, of our report dated February 20, 2025, relating to the consolidated financial statements of Discover Financial Services, and our report dated February 20, 2025 relating to the effectiveness of Discover Financial Services’ internal control over financial reporting appearing in this Current Report on Form 8-K/A of Capital One Financial Corporation filed on May 22, 2025.
| Filed on Form S-3 | Filed on Form S-8 | |
| Registration Statement No. 033-99748 | Registration Statement No. 333-58628 | |
| Registration Statement No. 333-97125 | Registration Statement No. 333-72788 | |
| Registration Statement No. 333-277813 | Registration Statement No. 333-72820 | |
| Registration Statement No. 333-72822 | ||
| Filed on Form S-8 | Registration Statement No. 333-76726 | |
| Registration Statement No. 033-86986 | Registration Statement No. 333-97123 | |
| Registration Statement No. 033-91790 | Registration Statement No. 333-97127 | |
| Registration Statement No. 033-97032 | Registration Statement No. 333-100488 | |
| Registration Statement No. 333-42853 | Registration Statement No. 333-117920 | |
| Registration Statement No. 333-45453 | Registration Statement No. 333-124428 | |
| Registration Statement No. 333-51637 | Registration Statement No. 333-136281 | |
| Registration Statement No. 333-51639 | Registration Statement No. 333-133665 | |
| Registration Statement No. 333-57317 | Registration Statement No. 333-151325 | |
| Registration Statement No. 333-70305 | Registration Statement No. 333-158664 | |
| Registration Statement No. 333-78067 | Registration Statement No. 333-181736 | |
| Registration Statement No. 333-78383 | Registration Statement No. 333-193683 | |
| Registration Statement No. 333-78609 | Registration Statement No. 333-195677 | |
| Registration Statement No. 333-78635 | Registration Statement No. 333-219570 | |
| Registration Statement No. 333-84693 | Registration Statement No. 333-232907 | |
| Registration Statement No. 333-91327 | Registration Statement No. 333-256072 | |
| Registration Statement No. 333-92345 | Registration Statement No. 333-256073 | |
| Registration Statement No. 333-272146 | Registration Statement No. 333-279208 | |
| Registration Statement No. 333-43288 | Registration Statement No. 333-287380 |
/s/ Deloitte & Touche LLP
Chicago, Illinois
May 22, 2025