Exhibit 99.1

EMPIRE STATE REALTY TRUST ANNOUNCES THIRD QUARTER 2017 RESULTS

- Earnings of $0.12 Per Fully Diluted Share -

- Core FFO of $0.26 Per Fully Diluted Share -

- Leased 487,854 Square Feet of Office Space -

New York, New York, October 31, 2017—Empire State Realty Trust, Inc. (NYSE: ESRT) (the “Company”), a real estate investment trust with office and retail properties in Manhattan and the greater New York metropolitan area, today reported its operational and financial results for the third quarter of 2017.

“We are pleased with our strong third quarter results,” stated John B. Kessler, Empire State Realty Trust’s President and Chief Operating Officer. “Core FFO increased 7.7% from the third quarter of 2016. We continue to consolidate, redevelop and re-lease space to larger, higher credit quality tenants at materially higher rents and create value. During the quarter, we leased over 487,000 square feet which resulted in attractive spreads on both new Manhattan office and total portfolio leases of 46.1% and 27.7%, respectively. This quarter, we signed major lease agreements with Fragomen, Del Rey, Bernsen & Loewy, LLP for 108,000 square feet at 1400 Broadway and the American Society of Composers, Authors and Publishers for 85,000 square feet at 250 West 57th Street. Tenants continue to be attracted to our well-located, amenity-rich office buildings which have all been modernized for the 21^st Century.”

“Year-to-date, Observatory revenue grew 3.4% and Observatory net operating income grew 2.7%, as compared with the first nine months of 2016, driven by improved revenue mix despite unfavorable weather conditions,” added Kessler. “We further strengthened our balance sheet through the successful refinancing of our existing unsecured revolving credit facility and term loan which extended the credit facility maturity, lowered our borrowing costs and added flexibility to our financial covenants. We are well-positioned with the liquidity, strength, and flexibility of our balance sheet to fund future growth opportunities and create long-term value for our shareholders.”

1

Third Quarter Highlights

Financial Results for the Third Quarter 2017

Net income attributable to common stockholders was $18.8 million, or $0.12 per fully diluted share, compared to $16.0 million, or $0.12 per fully diluted share, in the third quarter of 2016.

Core FFO was $77.5 million, or $0.26 per fully diluted share, compared to $71.9 million, or $0.26 per fully diluted share, in the third quarter of 2016.

2

Modified FFO was $75.3 million, or $0.25 per fully diluted share, compared to $71.9 million, or $0.26 per fully diluted share, in the third quarter of 2016.

FFO was $73.4 million, or $0.25 per fully diluted share, compared to $70.0 million, or $0.25 per fully diluted share, in the third quarter of 2016.

A reconciliation of net income to FFO, Modified FFO and Core FFO is provided in the tables accompanying this press release.

Financial Results for the Nine Months Ended September 30, 2017

Net income attributable to common stockholders was $45.4 million, or $0.29 per fully diluted share, compared to $34.5 million, or $0.27 per fully diluted share, in the nine months ended September 30, 2016.

Core FFO was $212.0 million, or $0.71 per fully diluted share, compared to $194.8 million, or $0.72 per fully diluted share, in the nine months ended September 30, 2016.

Modified FFO was $209.9 million, or $0.70 per fully diluted share, compared to $194.2 million, or $0.72 per fully diluted share, in the nine months ended September 30, 2016.

FFO was $204.0 million, or $0.68 per fully diluted share, compared to $188.3 million, or $0.69 per fully diluted share, in the nine months ended September 30, 2016.

A reconciliation of net income to FFO, Modified FFO and Core FFO is provided in the tables accompanying this press release.

Portfolio Operations

As of September 30, 2017, the Company’s total portfolio contained 10.1 million rentable square feet of office and retail space. The Company’s occupancy levels fluctuate in certain periods due to the timing lag that exists between the date of tenants’ move out and the date of Company’s completion of redevelopment work for new leases to commence. As of September 30, 2017, the Company’s portfolio was occupied and leased as follows. Leased percentages include signed leases not commenced.

3

Leasing

For the three months ended September 30, 2017, the Company signed 34 new, renewal, and expansion leases within the total portfolio, comprising 487,854 rentable square feet with an average starting rental rate of $52.52 per rentable square foot, representing an increase of 27.7% over the previous fully escalated rent.

On a blended basis, the 27 new, renewal, and expansion office leases signed within the Manhattan office portfolio during the quarter had an average starting rental rate of $58.46 per rentable square foot, representing an increase of 41.1% over the previous fully escalated rent.

4

Leases Signed in the Third Quarter 2017 for the Manhattan Office Portfolio

Significant Leases Executed During the Third Quarter 2017

Empire State Building

The Company continues to renovate and lease the 2.8 million rentable square foot Empire State Building, its flagship property. As previously announced in the second quarter 2017, the Company commenced the first phase of a capital project to enhance the experience of office and retail tenants and Observatory visitors. The first phase will move the Observatory entrance to a new, larger, designated entrance at the western side of the Empire State Building on 34th Street which will improve the commercial tenant and office visitor experience and the value of the Empire State Building’s 34^th Street retail. At September 30, 2017, the Empire State Building was 93.3% occupied; including SLNC, the Empire State Building was 93.5% leased.

5

During the third quarter 2017, the Company signed eight office leases at the Empire State Building, representing 51,651 rentable square feet in the aggregate.

Observatory revenue for the third quarter 2017 was $39.3 million, a 3.1% increase from $38.1 million in the third quarter 2016. The Observatory hosted approximately 1,276,000 visitors in the third quarter 2017 compared to 1,340,000 visitors in the third quarter 2016, a decrease of 4.8%. In the third quarter 2017, there were 14 bad weather days compared to 10 bad weather days in the third quarter 2016. For the third quarter, the Company estimates that bad weather resulted in approximately thirty-five to forty thousand net fewer visitors than in the prior year period.

Observatory revenue was $94.2 million for the nine months ended September 30, 2017, a 3.4% increase from $91.1 million for the nine months ended September 30, 2016. For the nine months ended September 30, 2017, the Observatory hosted approximately 3,038,000 visitors, compared to 3,183,000 visitors for the same period in 2016, a decrease of 4.6%. For the nine months ended September 30, 2017, there were 51 bad weather days compared to 31 bad weather days in the nine months ended September 30, 2016.

Balance Sheet

At September 30, 2017, the Company had total debt outstanding of approximately $1.6 billion, with a weighted average interest rate of 4.05% per annum, and a weighted average term to maturity of 6.2 years. As of September 30, 2017, the Company had no debt maturing during the remainder of 2017 and $262.2 million of debt maturing in 2018. As of September 30, 2017, the Company had cash and cash equivalents of $432.1 million. The Company’s consolidated net debt to total market capitalization was approximately 15.7% as of September 30, 2017, and consolidated net debt to EBITDA was 3.3x.

During the third quarter 2017, the Company recast its unsecured credit facility in the original principal amount of $1.365 billion, which consists of a $1.1 billion revolving credit facility and a $265 million term loan facility. The recast credit facility replaced the prior revolving credit facility which had been due to mature in January 2019 and was undrawn as of September 30, 2017. The term loan facility was borrowed in full at closing and was used to repay a $265 million term loan that had been due in 2022. The Company has the ability to further increase the total capacity of the new unsecured credit facility to $1.75 billion through the exercise of an accordion option during the term.

6

The new revolving credit facility matures on August 29, 2021, and may be extended by two additional six-month periods at the option of the Company. The new term loan facility matures on August 29, 2022.

Initial interest rates on the new facility, which may change based on the Company’s leverage levels, are LIBOR plus 120 basis points for the term loan and LIBOR plus 110 basis points for any drawn portion of the revolving credit facility, a savings of 40 and 5 basis points, respectively, from the prior facilities. In addition, the initial annual revolving credit facility fee decreased from 20 basis points to 15 basis points.

Dividend

On September 30, 2017, the Company paid a dividend of $0.105 per share for the third quarter 2017 to holders of the Company’s Class A common stock and Class B common stock and to holders of the operating partnership’s Series ES, Series 250 and Series 60 operating partnership units (NYSE Arca: ESBA, FISK and OGCP, respectively) and Series PR operating partnership units. The Company paid a dividend of $0.15 per unit for the third quarter 2017 to holders of the operating partnership’s private perpetual preferred units.

Webcast and Conference Call Details

Empire State Realty Trust, Inc. will host a webcast and conference call, open to the general public, on Wednesday, November 1, 2017 at 8:30 am Eastern time.

The webcast will be available in the “Investors” section of the Company’s website at www.empirestaterealtytrust.com. To listen to the live webcast, go to the site at least five minutes prior to the scheduled start time in order to register, download and install any necessary audio software. Shortly after the call, a replay of the webcast will be available for 90 days on the Company’s website.

The conference call can also be accessed by dialing 1-877-407-3982 for domestic callers or 1-201-493-6780 for international callers. A dial-in replay will be available starting shortly after the call until November 8, 2017, which can be accessed by dialing 1-844-512-2921 for domestic callers or 1-412-317-6671 for international callers. The passcode for this dial-in replay is 13672125.

7

The Supplemental Report will be available prior to the conference call in the “Investors” section of the Company’s website, www.empirestaterealtytrust.com.

About Empire State Realty Trust

Empire State Realty Trust, Inc. (NYSE: ESRT), a leading real estate investment trust (REIT), owns, manages, operates, acquires and repositions office and retail properties in Manhattan and the greater New York metropolitan area, including the Empire State Building, the world’s most famous building. Headquartered in New York, New York, the Company’s office and retail portfolio covers 10.1 million rentable square feet, as of September 30, 2017, consisting of 9.4 million rentable square feet in 14 office properties, including nine in Manhattan, three in Fairfield County, Connecticut, and two in Westchester County, New York; and approximately 700,000 rentable square feet in the retail portfolio.

Forward-Looking Statements

This press release includes “forward looking statements” within the meaning of the federal securities laws. Forward-looking statements may be identified by the use of words such as “believes,” “expects,” “may,” “will,” “should,” “seeks,” “approximately,” “intends,” “plans,” “pro forma,” “estimates,” “contemplates,” “aims,” “continues,” “would” or “anticipates” or the negative of these words and phrases or similar words or phrases. The following factors, among others, could cause actual results and future events to differ materially from those set forth or contemplated in the forward-looking statements: changes in our industry, the real estate markets, either nationally or in Manhattan or the greater New York metropolitan area; resolution of legal proceedings involving the company; reduced demand for office or retail space; general volatility of the capital and credit markets and the market price of our Class A common stock and our publicly-traded operating partnership units; changes in our business strategy; changes in technology and market competition which affect utilization of our broadcast or other facilities; changes in domestic or international tourism, including geopolitical events and currency exchange rates; defaults on, early terminations of, or non-renewal of, leases by tenants; fluctuations in interest rates; declining real estate valuations and impairment charges; termination or expiration of our ground leases; our failure to obtain or maintain necessary outside financing, including our unsecured revolving credit facility; our leverage;

8

decreased rental rates or increased vacancy rates; our failure to redevelop and reposition properties, or to execute any newly planned capital project, successfully or on the anticipated timeline or at the anticipated costs; difficulties in identifying properties to acquire and completing acquisitions; risks of real estate development (including our Metro Tower development site) and capital projects, including the cost of construction delays and cost overruns; impact of changes in governmental regulations, tax law and rates and similar matters; and our failure to qualify as a real estate investment trust, or REIT. For a further discussion of these and other factors that could impact the Company’s future results, performance or transactions, see the section entitled “Risk Factors” in the Annual Report on Form 10-K for the year ended December 31, 2016, and other risks described in documents subsequently filed by the Company from time to time with the Securities and Exchange Commission.

While forward-looking statements reflect the Company’s good faith beliefs, they are not guarantees of future performance. The Company disclaims any obligation to publicly update or revise any forward-looking statement to reflect changes in underlying assumptions or factors, new information, data or methods, future events, or other changes after the date of this press release, except as required by applicable law. Prospective investors should not place undue reliance on any forward-looking statements, which are based only on information currently available to the Company (or to third parties making the forward-looking statements).

Contact:

Investors

Empire State Realty Trust Investor Relations

(212) 850-2678

IR@empirestaterealtytrust.com

Media

Sard Verbinnen & Co.

(212) 687-8080

9

Empire State Realty Trust, Inc.

Condensed Consolidated Statements of Income

(unaudited and amounts in thousands, except per share data)

10

Empire State Realty Trust, Inc.

Condensed Consolidated Statements of Income

(unaudited and amounts in thousands, except per share data)

11

Empire State Realty Trust, Inc.

Reconciliation of Net Income to Funds From Operations (“FFO”),

Modified Funds From Operations (“Modified FFO”) and Core Funds From Operations (“Core FFO”)

(unaudited and amounts in thousands, except per share data)

12

Empire State Realty Trust, Inc.

Reconciliation of Net Income to Funds From Operations (“FFO”),

Modified Funds From Operations (“Modified FFO”) and Core Funds From Operations (“Core FFO”)

(unaudited and amounts in thousands, except per share data)

13

Empire State Realty Trust, Inc.

Condensed Consolidated Balance Sheets

(unaudited and amounts in thousands)

14