Exhibit 99.1

ESSA Bancorp, Inc. Announces Fiscal 2016 First Quarter Financial Results

Company Release – January 27, 2016

Stroudsburg, PA. – (Marketwire), January 27, 2016 — ESSA Bancorp, Inc. (the “Company”) (NASDAQ ESSA) today reported net income of $2.0 million, or $0.19 per diluted share, for the quarter ended December 31, 2015, compared with net income of $2.6 million, or $0.25 per diluted share, for the same quarter last year. Results for the quarter ended December 31, 2015, include the acquisition of Eagle National Bank (“ENB”), which was completed on December 4, 2015. Non-recurring merger related charges were $245,000, or $0.01 per share (after-tax), for the recently-completed quarter.

The Company is the holding company for ESSA Bank & Trust, a $1.8 billion asset institution, which provides full service retail and commercial banking, financial, and investment services from 30 locations in eastern Pennsylvania.

FIRST QUARTER HIGHLIGHTS

Gary S. Olson, President and CEO, stated: “Much of our focus during the first quarter was toward our goals of closing the Eagle National Bank acquisition and converting their banking systems to ours. We are very pleased to have successfully accomplished both these goals as of December 4, 2015. The successful addition of Eagle was another step in our continuing transition to a more commercially-oriented bank, serving customers throughout eastern Pennsylvania. In addition, we also achieved progress on our goals of maintaining strong asset quality metrics, controlling operating costs and prudently managing capital.”

Income Statement Review

For the fiscal first quarter of 2016, the Company’s return on average assets and return on average equity were 0.47% and 4.50%, compared with 0.66% and 6.06%, respectively, in the corresponding period of fiscal 2015.

Net interest income increased $42,000, or 0.4%, to $11.1 million for the three months ended December 31, 2015, from $11.1 million for the comparable period in 2014.

Interest expense increased $65,000 for the quarter ended December 31, 2015 compared to the comparable period in 2014, while interest income increased $107,000.

The net interest margin for the first quarter of 2016 was 2.84%, compared with 2.85% for the previous quarter, and 2.99% for the first quarter of fiscal 2015. Growth in net interest-earning assets and stability in the cost of interest bearing liabilities for the 2015 fiscal first quarter compared to the 2014 first quarter were more than offset by declines in the yields on interest earning assets.

The Company’s provision for loan losses increased to $600,000 for the three months ended December 31, 2015, compared with $450,000 for the three months ended December 31, 2014. Net loan charge-offs in fiscal first quarter 2016 were $262,000 compared to $568,000 in fiscal first quarter 2015. Nonperforming assets totaled $25.4 million at December 31, 2015 compared to $25.2 million at December 31, 2014.

Noninterest income increased $3,000 or 0.2%, to $1.8 million for the three months ended December 31, 2015, compared with $1.8 million for the three months ended December 31, 2014.

Noninterest expense increased $820,000 or 9.2%, to $9.8 million for the three months ended December 31, 2015 compared with $9.0 million for the comparable period in 2014. The primary reasons for the increase in the 2015 period compared to the 2014 period include increases in compensation and employee benefits of $464,000, occupancy and equipment of $128.000 and data processing of $109,000. Also, as previously mentioned, noninterest expense for the first quarter of 2016, includes merger-related expenses of $245,000 and the costs of the larger, combined bank for December, 2015.

Balance Sheet, Asset Quality and Capital Adequacy Review

Total assets grew $156.9 million to $1.76 billion at December 31, 2015, from $1.61 billion at September 30, 2015. This increase was primarily due to the merger with ENB. Total net loans were $1.23 billion at December 31, 2015 compared with $1.10 billion at September 30, 2015.

Total deposits increased $143.4 million, or 13.1%, to $1.24 billion at December 31, 2015, from $1.10 billion at September 30, 2015. The merger with ENB was the primary reason for the increase in deposit accounts. During the same period, borrowings increased $12.7 million, reflecting the Company’s ability to obtain borrowed funds at what management believes represent attractive rates.

Nonperforming assets increased $2.7 million to $25.4 million, or 1.44%, of total assets at December 31, 2015, from $22.7 million, or 1.41%, of total assets at September 30, 2015 due primarily to the addition of ENB’s nonperforming assets.

Net charge-offs as a percent of total average loans were only 0.02% for the three months ending December 31, 2015 and 0.05% for the three months ended December 31, 2014, which reflects the Company’s disciplined credit and underwriting standards. The allowance for loan losses was $9.3 million, or 0.75% of loans outstanding, at December 31, 2015, compared to $8.9 million, or 0.80% of loans outstanding at September 30, 2015 reflecting the purchase of loans from ENB. Purchased loans are initially recorded at fair market value at acquisition and therefore do not require an allowance when first recorded.

The Bank continued to demonstrate financial strength, with a Tier 1 leverage ratio of 9.44%, exceeding accepted regulatory standards for a well-capitalized institution. The Company maintained a tangible equity to total assets ratio of 8.68%.

Stockholders’ equity decreased $1.3 million to $170.0 million at December 31, 2015, from $171.3 million at September 30, 2015. During the three months ended December 31, 2015, the Company repurchased 22,700 shares at an average cost of $13.24 per share. Tangible book value per share at December 31, 2015 decreased to $13.52, compared with $14.03 at September 30, 2015 as expected due to the acquisition of ENB.

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About the Company: ESSA Bancorp, Inc. is the holding company for its wholly-owned subsidiary, ESSA Bank & Trust, which was formed in 1916. Headquartered in Stroudsburg, Pennsylvania, the Company has total assets of $1.8 billion and has 30 community offices throughout the Greater Pocono, Lehigh Valley, Scranton/Wilkes-Barre, and suburban Philadelphia areas. ESSA Bank & Trust offers a full range of commercial and retail financial services, financial advisory and asset management capabilities. ESSA Bancorp Inc. stock trades on the NASDAQ Global Market (SM) under the symbol “ESSA”.

Forward-Looking Statements

Certain statements contained herein are “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. Such forward-looking statements may be identified by reference to a future period or periods, or by the use of forward-looking terminology, such as “may,” “will,” “believe,” “expect,” “estimate,” “anticipate,” “continue,” or similar terms or variations on those terms, or the negative of those terms. Forward-looking statements are subject to numerous risks and uncertainties, including, but not limited to, those related to the economic environment, particularly in the market areas in which the Company operates, competitive products and pricing, fiscal and monetary policies of the U.S. Government, changes in government regulations affecting financial institutions, including compliance costs and capital requirements, changes in prevailing interest rates, acquisitions and the integration of acquired businesses, credit risk management, asset-liability management, the financial and securities markets and the availability of and costs associated with sources of liquidity, and the Risk Factors disclosed in our annual and quarterly reports.

The Company wishes to caution readers not to place undue reliance on any such forward-looking statements, which speak only as of the date made. The Company wishes to advise readers that the factors listed above could affect the Company’s financial performance and could cause the Company’s actual results for future periods to differ materially from any opinions or statements expressed with respect to future periods in any current statements. The Company does not undertake and specifically declines any obligation to publicly release the result of any revisions, that may be made to any forward-looking statements to reflect events or circumstances after the date of such statements or to reflect the occurrence of anticipated or unanticipated events.

FINANCIAL TABLES FOLLOW

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ESSA BANCORP, INC. AND SUBSIDIARY

CONSOLIDATED BALANCE SHEET

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ESSA BANCORP, INC. AND SUBSIDIARY

CONSOLIDATED STATEMENT OF INCOME

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