EX- 99.906CERT

Certification Pursuant to Section 906 of the Sarbanes-Oxley Act

I, Peter K. Ewing, President/Chief Executive Officer of Northern Institutional Funds (the “Registrant”), certify that:

1. The Registrant’s periodic report on Form N-CSR for the period ended November 30, 2022 (the “Report”) fully complies with the requirements of Section 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:    February 1, 2023	/s/ Peter K. Ewing
	Peter K. Ewing, President
	(Chief Executive Officer)

This certification is being furnished to the Securities and Exchange Commission pursuant to Rule 30a-2(b) under the Investment Company Act of 1940, as amended, and 18 U.S.C. Section 1350 and is not being filed as part of the Report with the Commission.

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EX- 99.906CERT

Certification Pursuant to Section 906 of the Sarbanes-Oxley Act

I, Randal E. Rein, Treasurer/Chief Financial and Accounting Officer of Northern Institutional Funds (the “Registrant”), certify that:

1. The Registrant’s periodic report on Form N-CSR for the period ended November 30, 2022 (the “Report”) fully complies with the requirements of Section 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:    February 1, 2023	/s/ Randal E. Rein
	Randal E. Rein, Treasurer
	(Chief Financial and Accounting Officer)

This certification is being furnished to the Securities and Exchange Commission pursuant to Rule 30a-2(b) under the Investment Company Act of 1940, as amended, and 18 U.S.C. Section 1350 and is not being filed as part of the Report with the Commission.

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