Exhibit 5.1

Stradley Ronon Stevens & Young, LLP   1250 Connecticut Avenue, N.W., Suite 500   Washington, DC 20036-2652   Telephone 202.822.9611   Fax 202.822.0140   www.stradley. com

March 16, 2015

Bryn Mawr Bank Corporation

801 Lancaster Avenue

Bryn Mawr, Pennsylvania 19010

Re: Registration Statement on Form S-3 of Bryn Mawr Bank Corporation

Ladies and Gentlemen:

We have acted as counsel to and for Bryn Mawr Bank Corporation, a Pennsylvania corporation (the “Company”), in connection with the preparation and filing with the U.S. Securities and Exchange Commission (the “Commission”) of a registration statement on Form S-3 on March 16, 2015 (the “Registration Statement”) relating to the issuance from time to time of up to $200,000,000 in aggregate offering price of the Company’s (i) shares of common stock, par value $1.00 per share (“Common Stock”), (ii) one or more series of debt securities of the Company (“Debt Securities”), (iii) stock purchase contracts representing contracts obligating holders to purchase from the Company, and the Company to sell to the holders, a specified number of shares of Common Stock (or a number of shares within a range, determined pursuant to a predetermined formula) at a future date or dates (“Purchase Contracts”), such Purchase Contracts to be issued separately or as a part of units with debt securities or debt obligations of third parties (“Purchase Units”), (iv) warrants to purchase Common Stock or Debt Securities and (v) units (“Units”) comprising one or more of the Securities (as defined below) described in the preceding clauses (i) through (iv), in any combination. The Common Stock, Debt Securities, Purchase Contracts, Purchase Units, Warrants and Units are collectively referred to herein as the “Securities.” The Securities are being registered for offer and sale from time to time pursuant to Rule 415 under the Securities Act of 1933, as amended (the “Securities Act”).

We have examined copies of the Registration Statement, including the prospectus (“Prospectus”) constituting a part of the Registration Statement, the Company’s Amended and Restated Articles of Incorporation, included as Exhibit 3.1 to the Company’s Form 8-K filed with the Commission on November 21, 2007, the Company’s Amended and Restated Bylaws, included as Exhibit 3.2 to the Company’s Form 8-K filed with the Commission on November 21, 2007, the form of Indenture filed as Exhibit 4.3 to the Registration Statement, and such other records, documents and statutes as we have deemed necessary for purposes of this opinion letter.

In rendering this opinion, we have assumed and relied upon, without independent investigation (i) the authenticity, completeness, truth and due authorization and execution of all documents submitted to us as originals, (ii) the genuineness of all signatures on all documents submitted to us as originals and (iii) the conformity to the originals of all documents submitted to us as certified, electronic or photostatic copies.

The law covered by the opinions expressed herein is limited to the federal statutes, judicial decisions and rules and regulations of the governmental agencies of the United States of America and the statutes, judicial and administrative decisions and rules and regulations of the governmental agencies of the Commonwealth of Pennsylvania. We are not rendering any opinion as to compliance with any federal or state law, rule, or regulation relating to securities, or to the sale or issuance thereof. This opinion letter is being furnished in connection with the requirements of Item 601(b)(5) of the Commission’s Regulation S-K, and we express no opinion as to any matter pertaining to the contents of the Registration Statement, the Prospectus or any prospectus supplement, other than as expressly stated herein with respect to the issuance of the Securities.

Bryn Mawr Bank Corporation

March 16, 2015

Page 2

Our opinions are limited and qualified in all respects by the effects of (i) general principles of equity and limitations on availability of equitable relief, including specific performance, whether applied by a court of law or equity, and (ii) bankruptcy, insolvency, reorganization, moratorium, arrangement, fraudulent conveyance or fraudulent transfer, receivership, and other laws now or hereafter in force affecting the rights and remedies of creditors generally (not just creditors of specific types of debtors) and other laws now or hereafter in force affecting generally only creditors of specific types of debtors.

This opinion letter is given only with respect to laws and regulations presently in effect. We assume no obligation to advise you of any changes in law or regulation which may hereafter occur, whether the same are retroactively or prospectively applied, or to update or supplement this letter in any fashion to reflect any facts or circumstances which hereafter come to our attention.

Based upon, and subject to, the foregoing, and subject to the qualifications herein stated, we are of the opinion that:

1. With respect to the Common Stock offered under the Registration Statement, provided that (i) the Registration Statement and any required post-effective amendments thereto have all become effective under the Securities Act, and the Prospectus and any and all prospectus supplement(s) required by applicable laws have been delivered and filed as required by such laws, (ii) the issuance and sale of the Common Stock have been duly authorized by the Company by all necessary corporate action, (iii) the issuance and sale of the Common Stock do not violate any applicable law, are in conformity with the Company’s then-operative articles of incorporation (the “Articles of Incorporation”) and then-operative bylaws (the “Bylaws”), do not result in a default under or breach of any agreement or instrument binding upon the Company and comply with any applicable requirement or restriction imposed by any court or governmental body having jurisdiction over the Company and (iv) any certificates for the Common Stock have been duly executed by the Company, countersigned by the transfer agent therefor and duly delivered to the purchasers thereof or such shares of Common Stock have been otherwise duly delivered to the purchasers thereof, in each case upon payment in full of the consideration therefor, then the Common Stock, when issued and sold as contemplated in the Registration Statement, the Prospectus and the related prospectus supplement(s) and in accordance with any applicable duly authorized, executed and delivered purchase, underwriting or similar agreement, or upon exercise, exchange or conversion, as applicable, of any other Security in accordance with the terms of such other Security providing for such exercise, exchange or conversion, will be validly issued, fully paid and nonassessable.

2. With respect to the Debt Securities offered under the Registration Statement, provided that (i) the Registration Statement and any required post-effective amendments thereto have all become effective under the Securities Act, and the Prospectus and any and all prospectus supplement(s) required by applicable laws have been delivered and filed as required by such laws, (ii) the applicable indenture related to the Debt Securities to be issued, including any supplements thereto, has been duly authorized by the Company by all necessary corporate action and delivered to and duly accepted by the trustee, (iii) the issuance and sale and the terms of the Debt Securities have been duly authorized by the Company by all necessary corporate action, (iv) the terms of the applicable indenture, including any supplements thereto, and the terms of the Debt Securities and their issuance and sale have been duly established in conformity with the applicable indenture and as described in the Registration Statement, the Prospectus and the related prospectus supplement(s), and do not violate any applicable law, are in conformity with the Company’s then-operative Articles of Incorporation and Bylaws, do not result in a default under or breach of any agreement or instrument binding upon the Company and comply with any applicable requirement or restriction imposed by any court or governmental body having jurisdiction over the Company and (v) the Debt Securities have been duly authenticated by the indenture trustee and executed and delivered by the Company to the purchasers thereof upon payment in full of the consideration therefor, then the Debt Securities, when issued and sold as contemplated in the Registration Statement, the Prospectus and the related prospectus supplement(s) and in accordance with such indenture and any supplements thereto, and any applicable duly authorized, executed and delivered purchase, underwriting or similar agreement, will be valid and legally binding obligations of the Company.

Bryn Mawr Bank Corporation

March 16, 2015

Page 3

3. With respect to the Purchase Contracts offered under the Registration Statement, provided that (i) the Registration Statement and any required post-effective amendments thereto have all become effective under the Securities Act, and the Prospectus and any and all prospectus supplement(s) required by applicable laws have been delivered and filed as required by such laws, (ii) the issuance and sale and the terms of the Purchase Contracts have been duly authorized by the Company by all necessary corporate action, (iii) the terms of the Purchase Contracts and the underlying Common Stock relating thereto and their issuance and sale have been duly established as described in the Registration Statement, the Prospectus and the related prospectus supplement(s), and do not violate any applicable law, are in conformity with the Company’s then-operative Articles of Incorporation and Bylaws, do not result in a default under or breach of any agreement or instrument binding upon the Company and comply with any applicable requirement or restriction imposed by any court or governmental body having jurisdiction over the Company and (iv) the Purchase Contracts have been duly executed and delivered by the Company to the purchasers thereof upon payment in full of the consideration therefor, then the Purchase Contracts, when issued and sold as contemplated in the Registration Statement, the Prospectus and the related prospectus supplement(s), as applicable, and in accordance with any applicable duly authorized, executed and delivered purchase, underwriting or similar agreement, will be valid and legally binding obligations of the Company.

4. With respect to the Purchase Units offered under the Registration Statement, provided that (i) the Registration Statement and any required post-effective amendments thereto have all become effective under the Securities Act, and the Prospectus and any and all prospectus supplement(s) required by applicable laws have been delivered and filed as required by such laws, (ii) the issuance and sale and the terms of the Purchase Units have been duly authorized by the Company by all necessary corporate action, (iii) the terms of the Purchase Units, the underlying Common Stock relating to the Purchase Contracts which form a part thereof, any underlying Debt Securities which form a part thereof, and their issuance and sale have been duly established as described in the Registration Statement, the Prospectus and the related prospectus supplement(s), and do not violate any applicable law, are in conformity with the Company’s then-operative Articles of Incorporation and Bylaws, do not result in a default under or breach of any agreement or instrument binding upon the Company and comply with any applicable requirement or restriction imposed by any court or governmental body having jurisdiction over the Company and (iv) the Purchase Units have been duly executed and delivered by the Company to the purchasers thereof upon payment in full of the consideration therefor, then the Purchase Units, when issued and sold as contemplated in the Registration Statement, the Prospectus and the related prospectus supplement(s), as applicable, and in accordance with any applicable duly authorized, executed and delivered purchase, underwriting or similar agreement, will be valid and legally binding obligations of the Company; provided however, we express no opinion as to the validity, legality or enforceability of any debt securities or debt obligations issued by any third party which are included in any Purchase Unit.

5. With respect to the Warrants offered under the Registration Statement, provided that (i) the Registration Statement and any required post-effective amendments thereto have all become effective under the Securities Act, and the Prospectus and any and all prospectus supplement(s) required by applicable laws have been delivered and filed as required by such laws, (ii) the applicable warrant agreement under which the Warrants are to be issued has been duly authorized by the Company by all necessary corporate action, duly authorized by any applicable warrant agent and duly delivered by the parties, (iii) the issuance and sale and the terms of the Warrants have been duly authorized by the Company by all necessary corporate action, (iv) the terms of the Warrants and of their issuance and sale have been duly established in conformity with the applicable warrant agreement and as described in the Registration Statement, the Prospectus and the related prospectus supplement(s), and do not violate any applicable law, are in conformity with the Company’s then-operative Articles of Incorporation and Bylaws, do not result in a default under or breach of any agreement or instrument binding upon the Company and comply with any applicable requirement or restriction imposed by any court or governmental body having jurisdiction over the Company and (v) the Warrants have been duly executed by the Company and authenticated by any applicable warrant agent pursuant to such warrant agreement, and delivered to the purchasers thereof upon payment in full of the consideration therefor, then the Warrants, when issued and sold as contemplated in the Registration Statement, the Prospectus and the related prospectus supplement(s) and in accordance with such warrant agreement, and any applicable duly authorized, executed and delivered purchase, underwriting or similar agreement, will be valid and legally binding obligations of the Company.

Bryn Mawr Bank Corporation

March 16, 2015

Page 4

6. With respect to the Units offered under the Registration Statement, provided that (i) the Registration Statement and any required post-effective amendments thereto have all become effective under the Securities Act, and the Prospectus and any and all prospectus supplement(s) required by applicable laws have been delivered and filed as required by such laws, (ii) the issuance and sale and the terms of the Units have been duly authorized by the Company by all necessary corporate action, (iii) the terms of the Units and the underlying Securities relating thereto and their issuance and sale have been duly established as described in the Registration Statement, the Prospectus and the related prospectus supplement(s), and do not violate any applicable law, are in conformity with the Company’s then-operative Articles of Incorporation and Bylaws, do not result in a default under or breach of any agreement or instrument binding upon the Company and comply with any applicable requirement or restriction imposed by any court or governmental body having jurisdiction over the Company and (iv) the Units have been duly executed and delivered by the Company to the purchasers thereof upon payment in full of the consideration therefor, then the Units, when issued and sold as contemplated in the Registration Statement, the Prospectus and the related prospectus supplement(s), as applicable, and in accordance with any applicable duly authorized, executed and delivered purchase, underwriting or similar agreement, will be valid and legally binding obligations of the Company; provided however, we express no opinion as to the validity, legality or enforceability of any debt securities or debt obligations issued by any third party which are included in any Unit.

This opinion is for your benefit and may be relied upon by you and by persons entitled to rely upon it pursuant to the applicable provisions of the Securities Act of 1933, as amended.

We hereby consent to your filing of this opinion as an exhibit to the Registration Statement and we further consent to the reference to our firm under the caption “Legal Matters” in the Prospectus and each prospectus supplement and to any reference to our firm in the Registration Statement as legal counsel who have passed upon the legality of the securities offered thereby. In giving such consent, we do not hereby admit that we are “experts” within the meaning of the Securities Act, or the Rules and Regulations of the Commission issued thereunder, with respect to any part of the Registration Statement, including this exhibit.

Very truly yours,

/s/ STRADLEY RONON STEVENS & YOUNG, LLP