Exhibit 23.1

CONSENT OF INDEPENDENT REGISTERED PUBLIC ACCOUNTING FIRM

We consent to the incorporation by reference in this Registration Statement on Form S-3 of our report dated February 20, 2026, relating to the financial statements of RLI Corp. and the effectiveness of RLI Corp.'s internal control over financial reporting, appearing in the Annual Report on Form 10-K of RLI Corp. for the year ended December 31, 2025. We also consent to the reference to us under the heading "Experts" in such Registration Statement.

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