Exhibit 23.1

We consent to the inclusion in this Registration Statement of North Mountain Merger Corp. (the “Company) on Amendment No. 1 to Form S-1 (File No. 333-246328) of our report dated August 14, 2020, which includes an explanatory paragraph as to the Company’s ability to continue as a going concern, with respect to our audit of the financial statements of North Mountain Merger Corp. as of August 6, 2020 and for the period from July 14, 2020 (inception) through August 6, 2020, which report appears in the Prospectus, which is part of this Registration Statement. We also consent to the reference to our Firm under the heading “Experts” in such Prospectus.

/s/ Marcum LLP

Marcum LLP

New York, NY

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