<SEC-DOCUMENT>0001193125-17-229027-index.html : 20170717
<SEC-HEADER>0001193125-17-229027.hdr.sgml : 20170717
<ACCEPTANCE-DATETIME>20170717092513
ACCESSION NUMBER:		0001193125-17-229027
CONFORMED SUBMISSION TYPE:	S-3
PUBLIC DOCUMENT COUNT:		5
FILED AS OF DATE:		20170717
DATE AS OF CHANGE:		20170717

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:		S-3
		SEC ACT:		1933 Act
		SEC FILE NUMBER:	333-219313
		FILM NUMBER:		17966774

	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>S-3
<SEQUENCE>1
<FILENAME>d425561ds3.htm
<DESCRIPTION>FORM S-3
<TEXT>
Document 1 - file: d425561ds3.htm

</DOCUMENT>
<DOCUMENT>
<TYPE>EX-4.2
<SEQUENCE>2
<FILENAME>d425561dex42.htm
<DESCRIPTION>EX-4.2
<TEXT>
Document 2 - file: d425561dex42.htm

</DOCUMENT>
<DOCUMENT>
<TYPE>EX-5
<SEQUENCE>3
<FILENAME>d425561dex5.htm
<DESCRIPTION>EX-5
<TEXT>
Document 3 - file: d425561dex5.htm

</DOCUMENT>
<DOCUMENT>
<TYPE>EX-23.1
<SEQUENCE>4
<FILENAME>d425561dex231.htm
<DESCRIPTION>EX-23.1
<TEXT>
Document 4 - file: d425561dex231.htm

</DOCUMENT>
<DOCUMENT>
<TYPE>GRAPHIC
<SEQUENCE>5
<FILENAME>g425561page031.jpg
<DESCRIPTION>GRAPHIC
<TEXT>
Document 5 - file: g425561page031.jpg

</DOCUMENT>
</SEC-DOCUMENT>