Exhibit 23.1

CONSENT OF INDEPENDENT REGISTERED PUBLIC ACCOUNTING FIRM

We consent to the incorporation by reference in Registration Statement (Form S-3) pertaining to First Defiance Financial Corp.’s registration of common and preferred stock; Registration Statement (Form S-8) pertaining to the First Defiance Financial Corp. 2010 Equity Incentive Plan; and Registration Statement (Form S-8) pertaining to First Defiance Financial Corp. Employee Investment Plan, of our report dated February 28, 2018 on the consolidated financial statements and the effectiveness of internal control over financial reporting of First Defiance Financial Corp. which report is included in Form 10-K for First Defiance Financial Corp. for the year ended December 31, 2017.

	/s/ Crowe Horwath LLP
	Crowe Horwath LLP
South Bend, Indiana
February 28, 2018