    <SEC-DOCUMENT>0001174947-22-000466-index.html : 20220405
    <SEC-HEADER>0001174947-22-000466.hdr.sgml : 20220405
    <ACCEPTANCE-DATETIME>20220405160129
    ACCESSION NUMBER:		0001174947-22-000466
    CONFORMED SUBMISSION TYPE:	DEF 14A
    PUBLIC DOCUMENT COUNT:		10
    CONFORMED PERIOD OF REPORT:	20220511
    FILED AS OF DATE:		20220405
    DATE AS OF CHANGE:		20220405

    FILER:

    	COMPANY DATA:
    		COMPANY CONFORMED NAME:			MIDDLEFIELD BANC CORP
    		CENTRAL INDEX KEY:			0000836147
    		STANDARD INDUSTRIAL CLASSIFICATION:	STATE COMMERCIAL BANKS [6022]
    		IRS NUMBER:				341585111
    		STATE OF INCORPORATION:			OH

    	FILING VALUES:
    		FORM TYPE:		DEF 14A
    		SEC ACT:		1934 Act
    		SEC FILE NUMBER:	001-36613
    		FILM NUMBER:		22806686

    	BUSINESS ADDRESS:
    		STREET 1:		15985 E HIGH ST
    		STREET 2:		P O BOX 35
    		CITY:			MIDDLEFILED
    		STATE:			OH
    		ZIP:			44062-9263
    		BUSINESS PHONE:		4406321666

    	MAIL ADDRESS:
    		STREET 1:		15985 EAST HIGH STREET
    		STREET 2:		P O BOX 35
    		CITY:			MIDDLEFIELD
    		STATE:			OH
    		ZIP:			44062-9263
    </SEC-HEADER>
    <DOCUMENT>
    <TYPE>DEF 14A
    <SEQUENCE>1
    <FILENAME>def14a-55864_mbc.htm
    <DESCRIPTION>DEF 14A
    <TEXT>
    Document 1 - file: def14a-55864_mbc.htm

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>GRAPHIC
    <SEQUENCE>2
    <FILENAME>image_001.jpg
    <DESCRIPTION>GRAPHIC
    <TEXT>
    Document 2 - file: image_001.jpg

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>GRAPHIC
    <SEQUENCE>3
    <FILENAME>image_008.jpg
    <DESCRIPTION>GRAPHIC
    <TEXT>
    Document 3 - file: image_008.jpg

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>GRAPHIC
    <SEQUENCE>4
    <FILENAME>image_011.jpg
    <DESCRIPTION>GRAPHIC
    <TEXT>
    Document 4 - file: image_011.jpg

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>GRAPHIC
    <SEQUENCE>5
    <FILENAME>image_004.jpg
    <DESCRIPTION>GRAPHIC
    <TEXT>
    Document 5 - file: image_004.jpg

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>GRAPHIC
    <SEQUENCE>6
    <FILENAME>image_005.jpg
    <DESCRIPTION>GRAPHIC
    <TEXT>
    Document 6 - file: image_005.jpg

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    <DOCUMENT>
    <TYPE>GRAPHIC
    <SEQUENCE>7
    <FILENAME>image_006.jpg
    <DESCRIPTION>GRAPHIC
    <TEXT>
    Document 7 - file: image_006.jpg

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>GRAPHIC
    <SEQUENCE>8
    <FILENAME>image_007.jpg
    <DESCRIPTION>GRAPHIC
    <TEXT>
    Document 8 - file: image_007.jpg

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>GRAPHIC
    <SEQUENCE>9
    <FILENAME>img-pc_001.jpg
    <DESCRIPTION>GRAPHIC
    <TEXT>
    Document 9 - file: img-pc_001.jpg

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>GRAPHIC
    <SEQUENCE>10
    <FILENAME>img-pc_002.jpg
    <DESCRIPTION>GRAPHIC
    <TEXT>
    Document 10 - file: img-pc_002.jpg

    </DOCUMENT>
    </SEC-DOCUMENT>