    <SEC-DOCUMENT>0000842517-25-000073-index.html : 20250325
    <SEC-HEADER>0000842517-25-000073.hdr.sgml : 20250325
    <ACCEPTANCE-DATETIME>20250325085507
    ACCESSION NUMBER:		0000842517-25-000073
    CONFORMED SUBMISSION TYPE:	ARS
    PUBLIC DOCUMENT COUNT:		1
    CONFORMED PERIOD OF REPORT:	20241231
    FILED AS OF DATE:		20250325
    DATE AS OF CHANGE:		20250325
    EFFECTIVENESS DATE:		20250325

    FILER:

    	COMPANY DATA:
    		COMPANY CONFORMED NAME:			ISABELLA BANK Corp
    		CENTRAL INDEX KEY:			0000842517
    		STANDARD INDUSTRIAL CLASSIFICATION:	STATE COMMERCIAL BANKS [6022]
    		ORGANIZATION NAME:           	02 Finance
    		EIN:				382830092
    		STATE OF INCORPORATION:			MI
    		FISCAL YEAR END:			1231

    	FILING VALUES:
    		FORM TYPE:		ARS
    		SEC ACT:		1934 Act
    		SEC FILE NUMBER:	000-18415
    		FILM NUMBER:		25766037

    	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>ARS
    <SEQUENCE>1
    <FILENAME>isba_ar2024a.pdf
    <DESCRIPTION>ARS
    <TEXT>
    Document 1 - file: isba_ar2024a.pdf

    </DOCUMENT>
    </SEC-DOCUMENT>