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<SEC-DOCUMENT>0001200952-05-000489.txt : 20050520
<SEC-HEADER>0001200952-05-000489.hdr.sgml : 20050520
<ACCEPTANCE-DATETIME>20050520165011
ACCESSION NUMBER:		0001200952-05-000489
CONFORMED SUBMISSION TYPE:	497
PUBLIC DOCUMENT COUNT:		1
FILED AS OF DATE:		20050520
DATE AS OF CHANGE:		20050520
EFFECTIVENESS DATE:		20050520

FILER:

	COMPANY DATA:	
		COMPANY CONFORMED NAME:			COLUMBIA MID CAP GROWTH FUND INC
		CENTRAL INDEX KEY:			0000773599
		IRS NUMBER:				930896403
		STATE OF INCORPORATION:			OR
		FISCAL YEAR END:			1231

	FILING VALUES:
		FORM TYPE:		497
		SEC ACT:		1933 Act
		SEC FILE NUMBER:	002-99207
		FILM NUMBER:		05848779

	BUSINESS ADDRESS:	
		STREET 1:		1300 SW SIXTH AVE
		STREET 2:		P O BOX 1350
		CITY:			PORTLAND
		STATE:			OR
		ZIP:			97207
		BUSINESS PHONE:		5032223600

	MAIL ADDRESS:	
		STREET 1:		1300 SW SIXTH AVE
		STREET 2:		P O BOX 1350
		CITY:			PORTLAND
		STATE:			OR
		ZIP:			92707

	FORMER COMPANY:	
		FORMER CONFORMED NAME:	COLUMBIA SPECIAL FUND INC
		DATE OF NAME CHANGE:	19920703
</SEC-HEADER>
<DOCUMENT>
<TYPE>497
<SEQUENCE>1
<FILENAME>cmcgf_497-50520.txt
<TEXT>
                          COLUMBIA MID CAP GROWTH FUND
                                  (the "Fund")


                Supplement to Prospectuses Dated January 1, 2005

The section entitled "Managing the Fund - Portfolio Manager" is replaced in
entirety with the following:

PORTFOLIO MANAGER

Mr. Kenneth A. Korngiebel, CFA, a Senior Vice President of Columbia Management
manages the Fund and is responsible for implementing and maintaining the
investment themes and strategies of the Fund. Mr. Korngiebel joined Columbia in
1996 and has managed the Fund since June 2004.


                                                                   May 20, 2005

</TEXT>
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