Exhibit 99.1

Cathay General Bancorp Announces Fourth Quarter and Full Year 2019 Results

LOS ANGELES, Jan. 22, 2020 /PRNewswire/ — Cathay General Bancorp (the “Company”, “we”, “us”, or “our” NASDAQ: CATY), the holding company for Cathay Bank, today announced its unaudited financial results for the quarter and year ended December 31, 2019. The Company reported net income of $67.4 million, or $0.84 per share, for the fourth quarter of 2019, and net income of $279.1 million, or $3.48 per share, for the year ended December 31, 2019.

FINANCIAL PERFORMANCE

FULL YEAR HIGHLIGHTS

“We reported record net income of $279.1 million and record EPS of $3.48 in 2019. Strong loan growth of $1.1 billion in 2019, or 7.9%, was a major contributor to the record results.” commented Pin Tai, Chief Executive Officer of the Company.

FOURTH QUARTER INCOME STATEMENT REVIEW

Net income for the quarter ended December 31, 2019, was $67.4 million, an increase of $2.8 million, or 4.3%, compared to net income of $64.6 million for the same quarter a year ago. Diluted earnings per share for the quarter ended December 31, 2019, was $0.84 compared to $0.80 for the same quarter a year ago.

Return on average stockholders’ equity was 11.75% and return on average assets was 1.50% for the quarter ended December 31, 2019, compared to a return on average stockholders’ equity of 12.07% and a return on average assets of 1.56% for the same quarter a year ago.

Net interest income before provision for credit losses

Net interest income before provision for credit losses decreased $4.2 million, or 2.9%, to $141.2 million during the fourth quarter of 2019, compared to $145.4 million during the same quarter a year ago. The decrease was due primarily to an increase in interest expense from time deposits, offset in part by an increase in interest income from loans and securities.

The net interest margin was 3.34% for the fourth quarter of 2019 compared to 3.77% for the fourth quarter of 2018 and 3.56% for the third quarter of 2019.

For the fourth quarter of 2019, the yield on average interest-earning assets was 4.53%, the cost of funds on average interest-bearing liabilities was 1.61%, and the cost of interest-bearing deposits was 1.55%. In comparison, for the fourth quarter of 2018, the yield on average interest-earning assets was 4.76%, the cost of funds on average interest-bearing liabilities was 1.36%, and the cost of interest-bearing deposits was 1.29%. The decrease in the yield on average interest-earning assets resulted mainly from lower rates on loans. The net interest spread, defined as the difference between the yield on average interest-earning assets and the cost of funds on average interest-bearing liabilities, was 2.92% for the quarter ended December 31, 2019, compared to 3.40% for the same quarter a year ago.

Reversal for credit losses

Based on a review of the appropriateness of the allowance for loan losses at December 31, 2019, the Company recorded a reversal for credit losses of $5.0 million in fourth quarter of 2019 compared to no provision for credit losses in the fourth quarter of 2018. The reversal for credit losses is partially a result of net recoveries of $2.3 million, and the impact of the easing of tariffs on imports from China announced during the fourth quarter 2019. The following table sets forth the charge-offs and recoveries for the periods indicated:

Non-interest income

Non-interest income, which includes revenues from depository service fees, letters of credit commissions, securities gains (losses), wire transfer fees, and other sources of fee income, was $8.7 million for the fourth quarter of 2019, a decrease of $2.1 million, or 19.4%, compared to $10.8 million for the fourth quarter of 2018. The decrease was primarily due to a $4.0 million decrease in net gains from equity securities and offset by a $1.3 million increase in wealth management fees.

Non-interest expense

Non-interest expense decreased $3.2 million, or 4.3%, to $71.2 million in the fourth quarter of 2019 compared to $74.4 million in the same quarter a year ago. The decrease in non-interest expense in the fourth quarter of 2019 was primarily due to a $5.7 million decrease in amortization expense of investments in low income housing and alternative energy partnerships offset by a $1.2 million increase in FDIC and State assessments when compared to the same quarter a year ago. The efficiency ratio was 47.5% in the fourth quarter of 2019 compared to 47.6% for the same quarter a year ago.

Income taxes

The effective tax rate for the fourth quarter of 2019 was 19.5% compared to 21.0% for the fourth quarter of 2018. The effective tax rate includes an alternative energy investment made in the second quarter of 2019 and 2018 and the impact of low-income housing tax credits.

BALANCE SHEET REVIEW

Gross loans, excluding loans held for sale, were $15.1 billion at December 31, 2019, an increase of $1.1 billion, or 7.9%, from $14.0 billion at December 31, 2018. The increase was primarily due to increases of $394.7 million, or 10.7%, in residential mortgage loans, $551.1 million, or 8.2%, in commercial mortgage loans, and $98.0 million, or 39.2%, in equity lines of credit. The loan balances and composition at December 31, 2019, compared to September 30, 2019 and December 31, 2018, are presented below:

Total deposits were $14.7 billion at December 31, 2019, an increase of $1.0 billion, or 7.3%, from $13.7 billion at December 31, 2018. The deposit balances and composition at December 31, 2019, compared to September 30, 2019 and December 31, 2018, are set forth below:

ASSET QUALITY REVIEW

At December 31, 2019, total non-accrual loans were $40.5 million, a decrease of $6.7 million, or 14.2%, from $47.2 million at September 30, 2019, and a decrease of $1.3 million, or 3.1%, from $41.8 million at December 31, 2018.

The allowance for loan losses was $123.2 million and the allowance for off-balance sheet unfunded credit commitments was $3.9 million at December 31, 2019, which represented the amount believed by management to be appropriate to absorb credit losses inherent in the loan portfolio, including unfunded credit commitments. The $123.2 million allowance for loan losses at December 31, 2019, increased $0.8 million, or 0.7%, from $122.4 million at December 31, 2018. The allowance for loan losses represented 0.82% of period-end gross loans, excluding loans held for sale, and 262.6% of non-performing loans at December 31, 2019. The comparable ratios were 0.87% of period-end gross loans, excluding loans held for sale, and 268.5% of non-performing loans at December 31, 2018. The changes in non-performing assets and troubled debt restructurings at December 31, 2019, compared to December 31, 2018 and September 30, 2019, are shown below:

The ratio of non-performing assets to total assets was 0.3% at December 31, 2019, compared to 0.3% at December 31, 2018. Total non-performing assets decreased $1.1 million, or 1.9%, to $57.2 million at December 31, 2019, compared to $58.3 million at December 31, 2018, primarily due to a decrease of $2.4 million, or 19.2%, in other real estate owned, and a decrease of $1.3 million, or 3.1%, in non-accrual loans, offset in part by an increase of $2.6 million, or 69.9%, in accruing loans past due 90 days or more.

CAPITAL ADEQUACY REVIEW

At December 31, 2019, the Company’s Tier 1 risk-based capital ratio of 12.51%, total risk-based capital ratio of 14.11%, and Tier 1 leverage capital ratio of 10.83%, calculated under the Basel III capital rules, continue to place the Company in the “well capitalized” category for regulatory purposes, which is defined as institutions with a Tier 1 risk-based capital ratio equal to or greater than 8%, a total risk-based capital ratio equal to or greater than 10%, and a Tier 1 leverage capital ratio equal to or greater than 5%. At December 31, 2018, the Company’s Tier 1 risk-based capital ratio was 12.43%, total risk-based capital ratio was 14.15%, and Tier 1 leverage capital ratio was 10.83%.

FULL YEAR REVIEW

Net income for the year ended December 31, 2019, was $279.1 million, an increase of $7.2 million, or 2.6%, compared to net income of $271.9 million for the year ended December 31, 2018. Diluted earnings per share for the year ended December 31, 2019 was $3.48 compared to $3.33 per share for the year ended December 31, 2018. The net interest margin for the year ended December 31, 2019, was 3.54% compared to 3.79% for the year ended December 31, 2018.

Return on average stockholders’ equity was 12.63% and return on average assets was 1.61% for the year ended December 31, 2019, compared to a return on average stockholders’ equity of 13.18% and a return on average assets of 1.70% for the year ended December 31, 2018. The efficiency ratio for the year ended December 31, 2019, was 44.8% compared to 44.3% for the year ended December 31, 2018.

CONFERENCE CALL

Cathay General Bancorp will host a conference call this afternoon to discuss its fourth quarter and year-end 2019 financial results. The call will begin at 3:00 p.m., Pacific Time. Analysts and investors may dial in and participate in the question-and-answer session. To access the call, please dial 1-855-761-3186 and enter Conference ID 8985581. A listen-only live Webcast of the call will be available at www.cathaygeneralbancorp.com and a recorded version is scheduled to be available for replay for 12 months after the call.

ABOUT CATHAY GENERAL BANCORP

Cathay General Bancorp is the holding company for Cathay Bank, a California state-chartered bank. Founded in 1962, Cathay Bank offers a wide range of financial services. Cathay Bank currently operates 38 branches in California, 10 branches in New York State, four in Washington State, three in Illinois, two in Texas, one in Maryland, Massachusetts, Nevada, and New Jersey, one in Hong Kong, and a representative office in Taipei, Beijing, and Shanghai. Cathay Bank’s website is found at www.cathaybank.com. Cathay General Bancorp’s website is found at www.cathaygeneralbancorp.com. Information set forth on such websites is not incorporated into this press release.

FORWARD-LOOKING STATEMENTS

Statements made in this press release, other than statements of historical fact, are forward-looking statements within the meaning of the applicable provisions of the Private Securities Litigation Reform Act of 1995 regarding management’s beliefs, projections, and assumptions concerning future results and events. These forward-looking statements may include, but are not limited to, such words as “aims,” “anticipates,” “believes,” “can,” “continue,” “could,” “estimates,” “expects,” “hopes,” “intends,” “may,” “plans,” “projects,” “predicts,” “potential,” “possible,” “optimistic,” “seeks,” “shall,” “should,” “will,” and variations of these words and similar expressions. Forward-looking statements are based on estimates, beliefs, projections, and assumptions of management and are not guarantees of future performance. These forward-looking statements are subject to certain risks and uncertainties that could cause actual results to differ materially from our historical experience and our present expectations or projections. Such risks and uncertainties and other factors include, but are not limited to, adverse developments or conditions related to or arising from U.S. and international business and economic conditions; possible additional provisions for loan losses and charge-offs; credit risks of lending activities and deterioration in asset or credit quality; extensive laws and regulations and supervision that we are subject to including potential future supervisory action by bank supervisory authorities; increased costs of compliance and other risks associated with changes in regulation including the implementation of the Dodd-Frank Wall Street Reform and Consumer Protection Act; higher capital requirements from the implementation of the Basel III capital standards; compliance with the Bank Secrecy Act and other money

laundering statutes and regulations; potential goodwill impairment; liquidity risk; fluctuations in interest rates; risks associated with acquisitions and the expansion of our business into new markets; inflation and deflation; real estate market conditions and the value of real estate collateral; our ability to generate anticipated returns on our investments and financings, including in tax-advantaged projects; environmental liabilities; our ability to compete with larger competitors; our ability to retain key personnel; successful management of reputational risk; natural disasters and geopolitical events; general economic or business conditions in Asia, and other regions where Cathay Bank has operations; failures, interruptions, or security breaches of our information systems; our ability to adapt our systems to technological changes; risk management processes and strategies; adverse results in legal proceedings; certain provisions in our charter and bylaws that may affect acquisition of the Company; changes in accounting standards or tax laws and regulations; market disruption and volatility; restrictions on dividends and other distributions by laws and regulations and by our regulators and our capital structure; issuance of preferred stock; successfully raising additional capital, if needed, and the resulting dilution of interests of holders of our common stock; the soundness of other financial institutions; our ability to consummate and realize the anticipated benefits of our acquisitions; the risk that integration of business operations following any acquisitions, will be materially delayed or will be more costly or difficult than expected; and general competitive, economic political, and market conditions and fluctuations.

These and other factors are further described in Cathay General Bancorp’s Annual Report on Form 10-K for the year ended December 31, 2018 (Item 1A in particular), other reports filed with the Securities and Exchange Commission (“SEC”), and other filings Cathay General Bancorp makes with the SEC from time to time. Actual results in any future period may also vary from the past results discussed in this press release. Given these risks and uncertainties, readers are cautioned not to place undue reliance on any forward-looking statements, which speak to the date of this press release. Cathay General Bancorp has no intention and undertakes no obligation to update any forward-looking statement or to publicly announce any revision of any forward-looking statement to reflect future developments or events, except as required by law.

CATHAY GENERAL BANCORP

CONSOLIDATED FINANCIAL HIGHLIGHTS

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CATHAY GENERAL BANCORP

CONDENSED CONSOLIDATED BALANCE SHEETS

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CATHAY GENERAL BANCORP

CONDENSED CONSOLIDATED STATEMENTS OF OPERATIONS

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CATHAY GENERAL BANCORP

AVERAGE BALANCES – SELECTED CONSOLIDATED FINANCIAL INFORMATION

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CONTACT: Heng W. Chen, (626) 279-3652