Company: EVF
Filing Date: 2025-01-30
Form Type: 424B3
Source: 0000940394-25-000149
Chunk: 0

Company: Eaton Vance Senior Income Trust
Filing Date: 2025-01-30
Form: 424B3
Chunk 0
---
| Filed pursuant to Rule 424(b)(3) 
 File No. 333-263033              |

<div align='center'>EATON VANCE SENIOR INCOME TRUST

Supplement to Prospectus and Statement of Additional Information dated August 25, 2022,

as may be supplemented and/or revised from time to time</div>

Effective immediately, Catherine C. McDermott, Daniel
P. McElaney, CFA and Sarah A. Choi will continue to serve as portfolio managers of the Fund. All references to other portfolio managers
of the Fund are removed from the Fund’s Prospectus and Statement of Additional Information.

January 30, 2025