Report of Foreign Issuer (6-k)

Table of Contents

SECURITIES AND EXCHANGE COMMISSION

Washington, DC 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 September 2016

Commission File Number: 001-13372

KOREA ELECTRIC POWER CORPORATION

(Translation of registrant’s name into English)

55 Jeollyeok-ro, Naju-si, Jeollanam-do, 58217, 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-              .

Table of Contents

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.

Table of Contents

QUARTERLY BUSINESS REPORT

(For the period from January 1, 2016 to June 30, 2016)

THIS IS A SUMMARY IN ENGLISH OF THE QUARTERLY BUSINESS REPORT ORIGINALLY PREPARED IN KOREAN AND IS IN SUCH FORM AS REQUIRED BY THE FINANCIAL SERVICES COMMISSION OF KOREA.

IN THE TRANSLATION PROCESS, SOME PARTS OF THE REPORT WERE REFORMATTED, REARRANGED OR SUMMARIZED FOR THE CONVENIENCE OF READERS. NON-MATERIAL OR PREVIOUSLY DISCLOSED INFORMATION IS OMITTED OR ABRIDGED.

UNLESS EXPRESSLY STATED OTHERWISE, ALL INFORMATION CONTAINED HEREIN IS PRESENTED ON A CONSOLIDATED BASIS IN ACCORDANCE WITH INTERNATIONAL FINANCIAL REPORTING STANDARDS ADOPTED FOR USE IN KOREA, OR K-IFRS, WHICH DIFFER IN CERTAIN RESPECTS FROM GENERALLY ACCEPTED ACCOUNTING PRINCIPLES IN CERTAIN OTHER COUNTRIES, INCLUDING THE UNITED STATES. WE HAVE MADE NO ATTEMPT TO IDENTIFY OR QUANTIFY THE IMPACT OF THESE DIFFERENCES.

Table of Contents

I. Company Overview

1. Name of the company: Korea Electric Power Corporation (KEPCO)

2. Information of the company

(Address) 55 Jeollyeok-ro, Naju-si, Jeollanam-do, 58217, Korea

(Phone number) 82-61-345-4261

(Website) http://www.kepco.co.kr

3. Major businesses

KEPCO, as the parent company, is engaged in the following activities:

Businesses operated by KEPCO’s major subsidiaries are as follows: nuclear power generation by Korea Hydro & Nuclear Power (KHNP), thermal power generation by Korea South-East Power (KOSEP), Korea Midland Power (KOMIPO), Korea Western Power (KOWEPO), Korea Southern Power (KOSPO) and Korea East-West Power (EWP), other businesses including engineering service by KEPCO Engineering & Construction (KEPCO E&C), maintenance and repair of power plants by KEPCO Plant Service & Engineering (KEPCO KPS), nuclear fuel processing by KEPCO Nuclear Fuel (KEPCO NF), IT service by KEPCO KDN, and other overseas businesses and related investments.

4. Subsidiaries and affiliates of KEPCO

(As of June 30, 2016)

Table of Contents

5. Major changes in management for the second three-month period ended June 30, 2016

A. At the extraordinary meeting of shareholders of KEPCO held on April 25, 2016, Mr. Lee, Sung-Han was appointed as a standing director and a member of the audit committee in replacement of Mr. Ahn, Hong-Ryoul, whose term of office expired. On the same date, Mr. Cho, Jeon-Hyeok was reappointed as a non-standing director and a member of the audit committee.

B. On May 16, 2016, Mr. Kim, Ji-Hong was appointed as a non-standing director in the replacement of Mr. Ahn, Hyun-Ho, who voluntarily resigned on March 17, 2016.

6. Changes in major shareholders

On December 31, 2014, Korea Development Bank merged with Korea Finance Corporation, and became the largest shareholder of KEPCO.

7. Information regarding KEPCO shares

A. Issued share capital: Won 3,210 billion (Authorized capital: Won 6 trillion)

B. Total number of issued shares: 641,964,077 (Total number of shares authorized to for issuance: 1,200,000,000)

C. Dividends: Dividend payment of Won 3,100 per share for fiscal year 2015 (Won 1.99 trillion in aggregate). Dividend payments for fiscal year 2014 and 2013 were Won 500 and Won 90 per share respectively and no dividend was paid for fiscal year 2012.

II. Business Overview

1. Consolidated financial results by segment for a six-month period ended June 30, 2015 and 2016

(In billions of Won)

Table of Contents

2. Changes in unit prices of major products

(In Won per kWh)

3. Power purchase from generation companies for the six-month period ended June 30, 2016

Table of Contents

4. Intellectual property as of June 30, 2016

III. Financial Information

1. Condensed consolidated financial results as of and for a six-month period ended June 30, 2015 and 2016

(In billions of Won)

Table of Contents

2. Condensed separate financial results as of and for the six-month period ended June 30, 2015 and 2016

(In billions of Won)

IV. Board of Directors (KEPCO Only)

1. The board of directors is required to consist of not more than 15 directors including the president. Under our Article of Incorporation, there may not be more than 7 standing directors including president, and more than 8 non-standing directors. The number of non-standing directors must exceed the number of standing directors, including our president.

2. Board meetings and agendas for a six-month period ended June 30, 2016

Table of Contents

3. Major activities of the Board of Directors

Table of Contents

Table of Contents

Table of Contents

4. Major Activities and Attendance Status of Non-standing Directors

Table of Contents

Table of Contents

Table of Contents

(*) Ahn, Hyun-Ho voluntarily resigned on March 17, 2016. Under Korean Law, Mr. Ahn had retained the rights and had been subject to obligations as a non-standing director until his successor, Kim, Ji-Hong was appointed on May 16, 2016.

4. Major activities of the Audit Committee

Table of Contents

Table of Contents

The audit department, organized under the supervision of the Audit Committee, conducts internal audit over the entire company and takes administrative measures as appropriate in accordance with relevant internal regulations. KEPCO’s District Divisions and Branch Offices also have separate audit teams which conduct internal inspections with respect to the relevant divisions or offices.

Table of Contents

VI. Directors and employees as of and for a six-month period ended June 30, 2016 (KEPCO Only)

1. Directors

(In thousands of Won)

Table of Contents

VII. Other Information Necessary for the Protection of Investors

1. Summary of shareholder’s meetings for the first three-month period ended March 31

2. Pending legal proceedings as of June 30, 2016

(In billions of Won)

Some ongoing litigations were not included in the table above. Please refer to the contingencies and commitments part of notes to the following consolidated interim financial statements for details.

Table of Contents