<SEC-DOCUMENT>0000842517-18-000142-index.html : 20180813
<SEC-HEADER>0000842517-18-000142.hdr.sgml : 20180813
<ACCEPTANCE-DATETIME>20180813164143
ACCESSION NUMBER:		0000842517-18-000142
CONFORMED SUBMISSION TYPE:	4
PUBLIC DOCUMENT COUNT:		3
CONFORMED PERIOD OF REPORT:	20180810
FILED AS OF DATE:		20180813
DATE AS OF CHANGE:		20180813

REPORTING-OWNER:	

	OWNER DATA:	
		COMPANY CONFORMED NAME:			Opperman Sarah R
		CENTRAL INDEX KEY:			0001554598

	FILING VALUES:
		FORM TYPE:		4
		SEC ACT:		1934 Act
		SEC FILE NUMBER:	000-18415
		FILM NUMBER:		181012782

	MAIL ADDRESS:	
		STREET 1:		401 N MAIN ST
		CITY:			MT PLEASANT
		STATE:			MI
		ZIP:			48858

ISSUER:		

	COMPANY DATA:	
		COMPANY CONFORMED NAME:			ISABELLA BANK Corp
		CENTRAL INDEX KEY:			0000842517
		STANDARD INDUSTRIAL CLASSIFICATION:	STATE COMMERCIAL BANKS [6022]
		IRS NUMBER:				382830092
		STATE OF INCORPORATION:			MI
		FISCAL YEAR END:			1231

	BUSINESS ADDRESS:	
		STREET 1:		401 NORTH MAIN STREET
		CITY:			MT PLEASANT
		STATE:			MI
		ZIP:			48858
		BUSINESS PHONE:		9897729471

	MAIL ADDRESS:	
		STREET 1:		401 NORTH MAIN STREET
		CITY:			MT PLEASANT
		STATE:			MI
		ZIP:			48858

	FORMER COMPANY:	
		FORMER CONFORMED NAME:	ISABELLA BANK CORP
		DATE OF NAME CHANGE:	20080602

	FORMER COMPANY:	
		FORMER CONFORMED NAME:	IBT BANCORP INC /MI/
		DATE OF NAME CHANGE:	19920703
</SEC-HEADER>
<DOCUMENT>
<TYPE>4
<SEQUENCE>1
<FILENAME>wf-form4_153419288673695.xml
<DESCRIPTION>FORM 4
<TEXT>
Document 1 - file: wf-form4_153419288673695.html

Document 1 - RAW XML: wf-form4_153419288673695.xml

</DOCUMENT>
<DOCUMENT>
<TYPE>EX-24
<SEQUENCE>2
<FILENAME>powerattorney111.htm
<DESCRIPTION>POWER OF ATTORNEY:  SARAH R. OPPERMAN
<TEXT>
Document 2 - file: powerattorney111.htm

</DOCUMENT>
<DOCUMENT>
<TYPE>EX-24
<SEQUENCE>3
<FILENAME>ex-24.htm
<DESCRIPTION>OPPERMAN POA 07-25-18
<TEXT>
Document 3 - file: ex-24.htm

</DOCUMENT>
</SEC-DOCUMENT>