Exhibit 99.1

MOHEGAN GAMING & ENTERTAINMENT ANNOUNCES

FOURTH QUARTER FISCAL 2017 OPERATING RESULTS

Uncasville, Connecticut, November 21, 2017 – Mohegan Gaming & Entertainment, or MGE, the owner and operator of Mohegan Sun in Uncasville, Connecticut, and Mohegan Sun Pocono in Wilkes-Barre, Pennsylvania, announced today the operating results for its fourth fiscal quarter ended September 30, 2017.

“The MGE team delivered another strong September quarter and full fiscal year performance, led again by our flagship Connecticut property,” said Mario Kontomerkos, Chief Executive Officer of MGE. “Solid gaming volumes at Mohegan Sun were complemented by very strong, across-the-board non-gaming revenue growth, a trend we expect to persist with the introduction of the new Mohegan Sun Exposition and Convention Center, slated to open in the summer of 2018. The addition of the exposition and convention center, along with other ongoing initiatives, will continue to position Mohegan Sun as the premier gaming and entertainment destination in the Northeast for years to come.”

Consolidated operating results for the fourth quarter ended September 30, 2017 (unaudited):

The growth in Adjusted EBITDA, income from operations and net income attributable to MGE compared to the fourth quarter of fiscal 2016 was principally driven by strong gaming and non-gaming results at Mohegan Sun, combined with lower Corporate related operating costs and expenses. Net income attributable to MGE also reflects lower interest expense.

Mohegan Sun

Operating results (in thousands, unaudited):

The growth in Adjusted EBITDA and income from operations was principally driven by higher gaming and non-gaming revenues. Gaming revenues were boosted by strong slot and table game volumes, while non-gaming revenues benefited from the additional hotel room capacity added by our new 400-room Earth Hotel Tower, which opened in November 2016, and a strong entertainment calendar at the Mohegan Sun Arena. These results were partially offset by higher entertainment and payroll related costs. Adjusted EBITDA margin was 30.7% for the quarter ended September 30, 2017 compared to 31.3% in the fourth quarter of fiscal 2016.

Selected gaming data (in thousands, except where noted, unaudited):

Non-gaming data (in thousands, except where noted, unaudited):

Mohegan Sun Pocono

Operating results (in thousands, unaudited):

The growth in Adjusted EBITDA was principally due to our continued efforts to contain operating costs and expenses such as payroll costs and certain casino marketing and promotional expenses. The declines in gaming and non-gaming revenues reflected lower overall business volumes driven, in part, by a repositioning of our promotional offers. Adjusted EBITDA margin increased 270 basis points to 20.5% for the quarter ended September 30, 2017 from 17.8% in the fourth quarter of fiscal 2016.

Selected gaming data (in thousands, except where noted, unaudited):

Non-gaming revenues (in thousands, except where noted, unaudited):

Corporate

Operating results (in thousands, unaudited):

N.M.—Not Meaningful.

The growth in Adjusted EBITDA and income from operations was primarily driven by a reduction in the reserve against reimbursable costs and expenses advanced by us to ilani Casino Resort. The increase in net revenues reflected management fees earned in connection with our management contract with ilani Casino Resort, which opened in April 2017.

MGE Property Information

Other Information

Liquidity

As of September 30, 2017, MGE held cash and cash equivalents of $89.0 million compared to $83.7 million as of September 30, 2016. As of September 30, 2017, no amounts were drawn on MGE’s $170.0 million revolving credit facility and $25.0 million line of credit. As of September 30, 2017, letters of credit issued under the revolving credit facility totaled $50.6 million, of which no amounts were drawn. Inclusive of letters of credit, which reduce borrowing availability under the revolving credit facility, MGE had approximately $119.4 million of borrowing capacity under its revolving credit facility and line of credit as of September 30, 2017.

Interest Expense

Interest expense decreased by $5.9 million, or 17.4%, to $28.0 million for the quarter ended September 30, 2017 compared to $33.9 million in the fourth quarter of fiscal 2016. The reduction in interest expense was attributable to lower weighted average interest rate driven by MGE’s October 2016 refinancing and April 2017 repricing transactions. Weighted average interest rate was 6.6% for the quarter ended September 30, 2017 compared to 7.9% in the fourth quarter of fiscal 2016. Weighted average outstanding debt was $1.71 billion for each of the quarters ended September 30, 2017 and 2016.

Capital Expenditures

The following table presents data related to capital expenditures (in millions):

Distributions to the Mohegan Tribe

Distributions to the Mohegan Tribe totaled $21.0 million for the quarter ended September 30, 2017 compared to $18.5 million in the fourth quarter of fiscal 2016. Distributions to the Mohegan Tribe are anticipated to total $60.0 million for fiscal 2018.

Conference Call

MGE will host a conference call and simultaneous webcast regarding its fourth quarter of fiscal 2017 operating results on Tuesday, November 21, 2017 at 11:00 a.m. (Eastern Standard Time).

Those interested in participating in the call should dial as follows:

(877) 756-4274

(706) 643-0107 (International)

Conference ID: 12652338

Please call five minutes in advance to ensure that you are connected prior to the initiation of the call. Questions and answers will be reserved for call-in analysts and investors.

Parties who want to listen to the live conference call on the Internet may do so through a web link on MGE’s website at www.mohegangaming.com, under the “Financial Information/Financial Updates” section. Interested parties also may listen to a taped replay of the entire conference call commencing two hours after the call’s completion on Tuesday, November 21, 2017. This replay will run through December 5, 2017.

The access number for a taped replay of the conference call is as follows:

(855) 859-2056

(404) 537-3406 (International)

Conference ID: 12652338

A transcript will be available on MGE’s website for a period of 90 days following the conference call.

About MGE

MGE owns and operates Mohegan Sun, a gaming and entertainment complex located on an approximately 196-acre site on the Mohegan Tribe’s reservation. Through its subsidiary, Downs Racing, L.P., MGE also owns and operates Mohegan Sun Pocono, a gaming and entertainment facility located on an approximately 400-acre site in Plains Township, Pennsylvania, and several off-track wagering facilities located elsewhere in Pennsylvania.

Mohegan Sun is one of only two legally authorized gaming operations in southern New England offering traditional slot machines and table games. Mohegan Sun currently operates in an approximately 5 million square-foot facility, which includes Casino of the Earth, Casino of the Sky, Casino of the Wind, 100,000 square feet of retail space, including The Shops at Mohegan Sun, a 10,000-seat Mohegan Sun Arena, a 350-seat Cabaret Theatre, 100,000 square feet of meeting and convention space, the 1,200-room luxury Sky Hotel Tower and the 400-room Earth Hotel Tower. Mohegan Sun Pocono operates in an approximately 400,000 square-foot facility, offering traditional slot machines and table games, live harness racing and simulcast and off-track wagering, a 238-room hotel, 20,000 square feet of meeting and convention space, several dining and retail options and a bus passenger lounge.

MGE has expanded its business to several new markets across the country and internationally, including the management of Resorts Casino Hotel in Atlantic City, New Jersey, the development and management of ilani Casino Resort in Clark County, Washington, and the development and management of Project Inspire, a first-of-its-kind, multi-billion dollar integrated resort and casino project to be built at Incheon International Airport in South Korea.

More information about MGE and its properties can be obtained by visiting www.mohegansun.com, www.mohegansunpocono.com or www.mohegangaming.com.

Special Note Regarding Forward-Looking Statements

Some information included in this press release may contain forward-looking statements, within the meaning of Section 27A of the Securities Act of 1933 and Section 21E of the Securities Exchange Act of 1934. These statements can sometimes be identified by the use of forward-looking words such as “may,” “will,” “anticipate,” “estimate,” “expect” or “intend” and similar expressions. Such forward-looking information may involve important risks and uncertainties that could significantly affect anticipated results in the future and, accordingly, such results may differ materially from those expressed in any forward-looking statements made by or on behalf of MGE. Information concerning potential factors that could affect MGE’s financial results is included in its Annual Report on Form 10-K for the fiscal year ended September 30, 2016, as well as in MGE’s other reports and filings with the Securities and Exchange Commission. Any forward-looking statements included in this press release are made only as of the date of this release. MGE does not undertake any obligation to update or supplement any forward-looking statements to reflect subsequent events or circumstances. MGE cannot assure that projected results or events will be achieved or will occur.

MOHEGAN GAMING & ENTERTAINMENT

CONSOLIDATED STATEMENTS OF INCOME

(in thousands)

(unaudited)

MOHEGAN GAMING & ENTERTAINMENT

CONSOLIDATED SELECTED FINANCIAL INFORMATION

(in thousands)

(unaudited)

MOHEGAN SUN

SUPPLEMENTAL DATA

(unaudited)

MOHEGAN SUN POCONO

SUPPLEMENTAL DATA

(unaudited)

CORPORATE

SUPPLEMENTAL DATA

(unaudited)

MOHEGAN GAMING & ENTERTAINMENT

ADJUSTED EBITDA RECONCILIATIONS

(unaudited)

Reconciliations of Net Income to Adjusted EBITDA:

Reconciliations of net income, a financial measure determined in accordance with accounting principles generally

accepted in the United States of America, or GAAP, to Adjusted EBITDA are shown below (in thousands):

Reconciliations of Income (Loss) from Operations to Adjusted EBITDA (unaudited):

Reconciliations of income (loss) from operations, a financial measure determined in accordance with GAAP, to Adjusted EBITDA, are shown below (in thousands):

Adjusted EBITDA Explanation:

Net income before interest, income taxes, depreciation and amortization, or EBITDA, is a commonly used measure of performance in the casino and hospitality industry. EBITDA is not a measure of performance calculated in accordance with GAAP. MGE historically has evaluated its operating performance with the non-GAAP measure, Adjusted EBITDA, which as used in this press release, represents net income before interest, depreciation and amortization, share-based compensation expense, gain or loss on disposition of assets, pre-opening costs and expenses, impairment charges, accretion of discount to a redemption liability, gain or loss on modification and early extinguishment of debt, income or loss from unconsolidated affiliates, property charges, other non-operating income and expense and Adjusted EBITDA attributable to non-controlling interests.

Adjusted EBITDA provides an additional way to evaluate MGE’s operations and, when viewed with both MGE’s GAAP results and the reconciliations provided, MGE believes that it provides a more complete understanding of its business than could be otherwise obtained absent this disclosure. Adjusted EBITDA is presented solely as a supplemental disclosure because: (1) MGE believes it enhances an overall understanding of MGE’s past and current financial performance; (2) MGE believes it is a useful tool for investors to assess the operating performance of the business in comparison to other operators within the casino and hospitality industry since Adjusted EBITDA excludes certain items that may not be indicative of MGE’s operating results; (3) measures that are comparable to Adjusted EBITDA are often used as an important basis for the valuation of casino and hospitality companies; and (4) MGE uses Adjusted EBITDA internally to evaluate the performance of its operating personnel and management and as a benchmark to evaluate its operating performance in comparison to its competitors.

The use of Adjusted EBITDA has certain limitations. Adjusted EBITDA should be considered in addition to, not as a substitute for or superior to, any GAAP financial measure including net income (as an indicator of MGE’s performance) or cash flows provided by operating activities (as an indicator of MGE’s liquidity), nor should it be considered as an indicator of MGE’s overall financial performance. MGE’s calculation of Adjusted EBITDA is likely to be different from the calculation of Adjusted EBITDA or other similarly titled measurements used by other casino and hospitality companies, and therefore, comparability may be limited. Adjusted EBITDA eliminates certain items from net income, such as interest and depreciation and amortization. Each of these items has been incurred in the past, will continue to be incurred in the future and should be considered in the overall evaluation of MGE’s results. MGE compensates for these limitations by

providing relevant disclosures of items excluded in the calculation of Adjusted EBITDA, both in its reconciliations to the GAAP financial measure of net income and in its consolidated financial statements, all of which should be considered when evaluating its results. MGE strongly encourages investors to review its financial information in its entirety and not to rely on a single financial measure.

Contact:

Mario C. Kontomerkos

Chief Executive Officer

Mohegan Gaming & Entertainment

(860) 862-8000