Exhibit 99.1

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FOR IMMEDIATE RELEASE	​	For more information contact:
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June 18, 2025	Rodger A. McHargue at (812) 238-6000
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First Financial Corporation Declares Quarterly Dividend

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TERRE HAUTE, INDIANA - The directors of First Financial Corporation (NASDAQ: THFF) have declared a dividend of 51 cents per share payable on July 15, 2025, to shareholders of record at the close of business July 1, 2025.

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First Financial Corporation is the holding company for First Financial Bank N.A. in Indiana, Illinois, Kentucky, Tennessee, and Georgia.