Allen R. Nickles
LIMITED POWER OF ATTORNEY
SECURITIES LAW COMPLIANCE

The undersigned hereby constitutes and appoints Lori A. Castillo and Karen M.
Terenzi as the undersigned's true and lawful attorneys-in-fact and agents to
complete and execute such Forms 144, Forms 3, 4 and 5 and other forms
(collectively, the "Reporting Forms") as such attorneys-in-fact shall, in her
discretion, determine to be required or advisable pursuant to Rule 144
promulgated under the Securities Act of 1933 (as amended), Section 16 of the
Securities Exchange Act of 1934 (as amended) and the rules and regulations
promulgated thereunder, or any successor laws and regulations (collectively,
"SEC Law"), as a consequence of the undersigned's ownership, acquisition or
disposition of securities of Civista Bancshares, Inc. (the "Corporation"), and
to do all acts necessary in order to file such forms with the Securities and
Exchange Commission (the "SEC"), any securities exchange or national
association, the Corporation and such other person or agency as the
attorneys-in-fact shall deem appropriate.  Said attorneys-in-fact and agents
have the authority to act individually.  The undersigned hereby ratifies and
confirms all that said attorneys-in-fact and agents shall do or cause to be done
by virtue hereof.

The undersigned acknowledges that:

(1)	this Limited Power of Attorney authorizes, but does not require, the
attorneys-in-fact to act in her discretion on information provided to such
attorneys-in-fact without independent verification of such information;

(2)	any Reporting Forms prepared and/or executed by the attorneys-in-fact on
behalf of the undersigned pursuant to this Limited Power of Attorney will be in
such form and will contain such information and disclosure as such
attorneys-in-fact, in his discretion, deems necessary or desirable;

(3)	neither the Corporation nor the attorneys-in-fact assume (i) any liability
for the undersigned's responsibility to comply with the requirements of SEC Law,
(ii) any liability of the undersigned for any failure to comply with such
requirements, or (iii) any obligation or liability of the undersigned for profit
disgorgement under Section 16(b) of the Exchange Act;

(4)	this Limited Power of Attorney does not relieve the undersigned from
responsibility for compliance with the undersigned's obligations under SEC Law,
including without limitation the reporting requirements under Section 16 of the
Exchange Act; and

(5)	in order to execute any Reporting Forms, it is the undersigned's
responsibility to notify the attorneys-in-fact in a timely manner of any
transaction regarding the undersigned's ownership, acquisition or disposition of
Civista Bancshares, Inc. securities (SEC requires Reporting Forms to be filed
within two (2) business days of the transaction).

In such instances where the undersigned has executed any of the Reporting Forms
on his or her own behalf, the undersigned hereby consents to the filing of
copies of such Reporting Forms that reflect a conformed signature.  The
undersigned will maintain fully executed copies of any Reporting Forms so filed,
in his or her own records.

This Limited Power of Attorney is executed at Sandusky, Ohio as of the date set
forth below.

Date:  September 27, 2022
Allen R. Nickles


State of OHIO
County of Erie

On this 27th day of September, 2022, before me, the undersigned notary public,
appeared Allen R. Nickles, personally known to me or proved to me on the basis
of satisfactory evidence to be the individual whose name is subscribed to the
within instrument, and acknowledge to me that he executed the same.