ETFis Series Trust I N-CSRS

Exhibit 99.906CERT

Certification Pursuant to Rule 30a-2(b) under the 1940 Act and Section 906 of the Sarbanes-Oxley Act

I, William J. Smalley, President and Principal Executive Officer of ETFis Series Trust I (the “Registrant”), certify that:

1. The Form N-CSR of the Registrant containing the financial statements (the “Report”) fully complies with the requirements of Section 13(a) or 15(d) of the Securities Exchange Act of 1934, as amended; and

2. The information contained in the Report fairly presents, in all material respects, the financial condition and results of operations of the Registrant.

Date:	April 4, 2024	/s/ William J. Smalley
		William J. Smalley, President and Principal Executive Officer
		(Principal Executive Officer)

I, Brinton W. Frith, Treasurer and Principal Financial Officer of ETFis Series Trust I (the “Registrant”), certify that:

1. The Form N-CSR of the Registrant containing the financial statements (the “Report”) fully complies with the requirements of Section 13(a) or 15(d) of the Securities Exchange Act of 1934, as amended; and

2. The information contained in the Report fairly presents, in all material respects, the financial condition and results of operations of the Registrant.

Date:	April 4, 2024	/s/ Brinton W. Frith
		Brinton W. Frith, Treasurer and Principal Financial Officer/Principal Accounting Officer
		(Principal Financial Officer/Principal Accounting Officer)