EXHIBIT 16.1
November 20, 2023
Securities and Exchange Commission
100 F Street NE
Washington, DC 20549
Commissioners:
On November 17, 2023, we provided notice to Farmers & Merchants Bancorp (the Company) of our decision to not stand for reelection as the Company’s independent
registered public accounting firm.
We have read the statements made by Farmers & Merchants Bancorp, which we understand will be filed with the Securities and Exchange Commission, pursuant to Item 4.01
of Form 8-K, dated November 22, 2023, and are in agreement with the disclosures in the referenced Form 8-K, insofar as they pertain to our firm. We have not been requested nor are we
providing any representations related to the other disclosures included in this Form 8-K.
Sincerely,
/s/ Eide Bailly LLP
Eide Bailly LLP
www.eidebailly.com
800 Nicollet Mall, Ste. 1300 | Minneapolis, MN 55402-7033 | T 612.253.6500 | F 612.253.6600 | EOE