Exhibit 23

CONSENT OF INDEPENDENT REGISTERED PUBLIC ACCOUNTING FIRM

We consent to the incorporation by reference in Registration Statement Nos. 333-221284, 333-194071, and 333-111744 on Form S-8 of our report dated August 31, 2021, relating to the consolidated financial statements of Kimball International, Inc. and subsidiaries (the “Company”), and the effectiveness of the Company’s internal control over financial reporting, appearing in this Annual Report on Form 10-K of Kimball International, Inc. for the year ended June 30, 2021.

/s/ Deloitte & Touche LLP

DELOITTE & TOUCHE LLP

Indianapolis, Indiana

August 31, 2021