INVESTAR HOLDING CORPORATION
POWER OF ATTORNEY

	Know all by these presents, that the
undersigned hereby constitutes and appoints
the
Corporate Secretary, any Assistant Corporate
Secretary, the Chief Financial Officer of
Investar Holding Corporation (the
"Company"), and the Director of Financial
Reporting of
Investar Bank, each signing individually
(individually, an "Agent"), as the
undersigned's
true and lawful attorney-in-fact to:

	(1)	prepare, execute in the
undersigned's name and on the undersigned's
behalf,
and submit to the U.S. Securities and
Exchange Commission (the "SEC") a Form ID,
including
amendments thereto, and any other documents
necessary or appropriate to obtain codes and
passwords enabling the undersigned to make
electronic filings with the SEC of reports
required by Section 16(a) of the Securities
Exchange Act of 1934 or any rule or
regulation
of the SEC;

(2)	execute for and on behalf of the
undersigned, in the undersigned's capacity
as an
officer and/or director of  the Company,
Forms 3, 4 and 5 in accordance with Section
16(a)
of the Securities Exchange Act of 1934 and
the rules thereunder;

	(3)	do and perform any and all acts
for and on behalf of the undersigned which
may be necessary or desirable to complete
and execute any such Form 3, 4 or 5 and
timely
file such form with the SEC and any stock
exchange or similar authority; and

	(4)	take any other action of any type
whatsoever in connection with the
foregoing which, in the opinion of such
attorney-in-fact, may be of benefit to, in
the
best interest of, or legally required by,
the undersigned, it being understood that
the documents executed by such attorney-in-
fact on behalf of the undersigned pursuant
to this Power of Attorney shall be in such
form and shall contain such terms and
conditions as such attorney-in-fact may
approve in such attorney-in-fact's
discretion.

	The undersigned hereby grants to such
attorneys-in-fact full power and authority
to do and perform any and every act and
thing whatsoever requisite, necessary or
proper
to be done in the exercise of any of the
rights and powers herein granted, as fully
to
all intents and purposes as the undersigned
might or could do if personally present,
with
full power of substitution or revocation,
hereby ratifying and confirming all that
such
attorneys-in-fact, or any such attorney-in-
fact's substitute or substitutes, shall
lawfully
do or cause to be done by virtue of this
power of attorney and the rights and powers
herein
granted.  The undersigned acknowledges that
the foregoing attorneys-in-fact, in serving
in
such capacity at the request of the
undersigned, are not assuming, nor is the
Company
assuming, any of the undersigned's
responsibilities to comply with Section 16
of
the Securities Exchange Act of 1934.

	This Power of Attorney shall remain in
full force and effect until the undersigned
is no longer required to file Forms 3, 4 and
5 with respect to the undersigned's holdings
of and transactions in securities issued by
the Company, unless earlier revoked by the
undersigned in a signed writing delivered to
the foregoing attorney-in-fact.

	IN WITNESS WHEREOF, the undersigned has
caused this Power of Attorney to be executed
as of the date set forth below.

/s/ John R. Campbell
-------------------
Signature

John R. Campbell
-------------------
Print name

Witness:

/s/ Corey E. Moore
-------------------

Witness:

/s/ Ana Rupnik
-------------------
Date: January 26, 2023

SWORN TO AND SUBSCRIBED BEFORE ME
this 26th day of January 2023.

/s/ Katie Gravois Plaisance
-------------------
Notary Public

#34566
-------------------
Notary Public #