Report of Foreign Issuer (6-k)

SECURITIES AND EXCHANGE COMMISSION

Washington, D.C. 20549

FORM 6-K

REPORT OF FOREIGN PRIVATE ISSUER

Pursuant to Rule 13a-16 or 15d-16 of

the Securities Exchange Act of 1934

For the Month of October 2014

Commission File Number: 001-13372

KOREA ELECTRIC POWER CORPORATION

(Translation of registrant’s name into English)

512 Yeongdongdaero, Gangnam-gu, Seoul 135-791, Korea

(Address of principal executive offices)

Indicate by check mark whether the registrant files or will file annual reports under cover of Form 20-F or Form 40-F.

Form 20-F x Form 40-F ¨

Indicate by check mark if the registrant is submitting the Form 6-K in paper as permitted by Regulation S-T Rule 101(b)(1): ¨

Indicate by check mark if the registrant is submitting the Form 6-K in paper as permitted by Regulation S-T Rule 101(b)(7): ¨

Indicate by check mark whether the registrant by furnishing the information contained in this form is also thereby furnishing the information to the Commission pursuant to Rule 12g3-2(b) under the Securities Exchange Act of 1934.

Yes ¨ No x

If “Yes” is marked, indicate below the file number assigned to the registrant in connection with Rule 12g3-2(b): 82- .

This Report of Foreign Private Issuer on Form 6-K is deemed filed for all purposes under the Securities Act of 1933, as amended, and the Securities Exchange Act of 1934, as amended.

On January 22, 2010, a consortium comprised of Korea Electric Power Corporation (“KEPCO”) and Samsung C&T Corporation (“Samsung”) had entered into a green energy investment agreement (“GEIA”) with the Government of Ontario, Canada to develop, construct and operate wind and solar-powered electricity generation units in Ontario (the “Project”). However, due to changes in circumstances, including the Ontario government’s decision to reduce the installed capacity for such generation units and other business considerations, KEPCO decided to withdraw itself as a member of the consortium.

For further details relating to the project, see Form 6-K furnished to the Securities and Exchange Commission on January 27, 2010.

SIGNATURES

Pursuant to the requirements of the Securities Exchange Act of 1934, the registrant has duly caused this report to be signed on its behalf by the undersigned, thereunto duly authorized.