LIMITED POWER OF ATTORNEY FOR
SECTION 16 REPORTING OBLIGATIONS


	Known all men by these presents, that the undersigned does hereby constitute
and appoint Thomas J. Chmelik and Alex Vari, jointly and each of them severally,
the undersigned's true and lawful attorney-in-fact and agent, with full power of
substitution and resubstitution, for the undersigned and in the undersigned's
name, place and stead, in any and all capacities, to:

(1)	execute for and on behalf of the undersigned, in the undersigned's capacity
as an officer and/or director of MainStreet Bancshares, Inc. (the
"Corporation"), Forms 3, 4 and 5, and any and all amendments thereto, in
accordance with Section 16(a) of the Securities Exchange Act of 1934, as amended
(the "Exchange Act"), and the rules thereunder;

(2)	do and perform any and all acts on behalf of the undersigned which may be
necessary or desirable to complete and execute any such Forms 3, 4 or 5, or an
amendment thereto, and timely file such form with the Securities and Exchange
Commission and any stock exchange or similar authority; and

(3)	take any other action of any type whatsoever in connection with the
foregoing which, in the opinion of such attorney-in-fact, may be of benefit to,
in the best interest of, or legally required by, the undersigned, it being
understood that the documents being executed by such attorney-in-fact on behalf
of the undersigned pursuant to this Power of Attorney shall be in such form and
shall contain such terms and conditions as such attorney-in-fact may approve in
such attorney-in-fact's discretion.

The undersigned hereby grants to each such attorney-in-fact full power and
authority to do and perform any and every act and thing whatsoever requisite,
necessary, or proper to be done in the exercise of any of the rights and powers
herein granted, as fully to all intents and purposes as the undersigned might or
could do if personally present, hereby ratifying and confirming all that such
attorney-in-fact, or such attorney-in-fact's substitute or substitutes, shall
lawfully do or cause to be done by virtue of this Power of Attorney and the
rights and powers herein granted. The undersigned acknowledges that the
foregoing attorneys-in-fact, in serving in such capacity at the request of the
undersigned, are not assuming, nor is the Corporation assuming, any of the
undersigned's responsibilities to comply with Section 16 of the Exchange Act.
This Power of Attorney shall remain in full force and effect until the
undersigned is no longer required to file Forms 3, 4 and 5 with respect to the
undersigned's holdings of and transactions in securities issued by the
Corporation, unless earlier revoked by the undersigned in a signed writing
delivered to the foregoing attorneys-in-fact.

IN WITNESS WHEREOF, the undersigned has executed this Power of Attorney as of
this 5 day of February, 2020.






                                         /s/ Thomas J. Chmelik
                                         Signature



                                         Thomas J Chmelik
                                         Print Name