Exhibit 99.1

Synovus Announces Earnings for Third Quarter 2015, $300 Million Stock Repurchase Program, and 20% Increase in Quarterly Common Stock Dividend

COLUMBUS, Ga., October 20, 2015 – Synovus Financial Corp. (NYSE: SNV) today reported financial results for the quarter ended September 30, 2015.

Third Quarter Highlights

“We are pleased to announce a $300 million share repurchase program to be executed over the next 15 months and a 20% increase in our quarterly common stock dividend. Our ability to take this action is a direct result of our sustained growth, significantly improved risk profile, and strong capital position,” said Kessel D. Stelling, Synovus Chairman and CEO. “Our performance in the third quarter demonstrated our team’s continued progress in growing loans, especially in high-growth markets; in growing core deposits across our footprint; and in improving the quality of our balance sheet. Moving ahead, we are actively engaged in initiatives that generate growth, specifically in areas that further diversify our balance sheet and improve our fee income contribution. We continue to add revenue-generating talent at an aggressive pace while also managing expenses to support our investments in growth. Above all, our team remains committed to serving customers and winning new relationships.”

Balance Sheet

Core Performance

Adjusted pre-tax, pre-credit costs income was $104.7 million for the third quarter 2015, an increase of $1.1 million or 1.1% from $103.6 million for the previous quarter and an increase of $1.2 million or 1.2% as compared to the third quarter 2014.

Credit Quality

Broad-based improvement in credit quality continued.

non-usage fees, and miscellaneous other service charges.

Capital Ratios

Capital ratios remained strong and include the impact of common stock repurchases completed through September 30, 2015.

Capital Management

Third Quarter Earnings Conference Call

Synovus will host an earnings highlights conference call at 8:30 a.m. EDT on October 20, 2015. The earnings call will be accompanied by a slide presentation. Shareholders and other interested parties may listen to this conference call via simultaneous Internet broadcast. For a link to the webcast, go to www.synovus.com/webcasts. The replay will be archived for 12 months and will be available 30-45 minutes after the call.

About Synovus

Synovus Financial Corp. is a financial services company based in Columbus, Georgia, with approximately $28 billion in assets. Synovus provides commercial and retail banking, investment, and mortgage services to customers through 28 locally-branded divisions, 258 branches, and 336 ATMs in Georgia, Alabama, South Carolina, Florida, and Tennessee. Synovus Bank, a wholly owned subsidiary of Synovus, was recognized as one of America’s Most Reputable Banks by American Banker and the Reputation Institute in 2015. Synovus is on the web at synovus.com, on Twitter @synovus, and on LinkedIn at http://linkedin.com/company/synovus.

Forward-Looking Statements

This press release and certain of our other filings with the Securities and Exchange Commission contain statements that constitute “forward-looking statements” within the meaning of, and subject to the protections of, Section 27A of the Securities Act of 1933, as amended, and Section 21E of the Securities Exchange Act of 1934, as amended. All statements other than statements of historical fact are forward-looking statements. You can identify these forward-looking statements through Synovus’ use of words such as “believes,” “anticipates,” “expects,” “may,” “will,” “assumes,” “should,” “predicts,” “could,” “would,” “intends,” “targets,” “estimates,” “projects,” “plans,” “potential” and other similar words and expressions of the future or otherwise regarding the outlook for Synovus’ future business and financial performance and/or the performance of the banking industry and economy in general. These forward-looking statements include, among others, our expectations on credit trends and key credit metrics; expectations regarding deposits, loan growth and the net interest margin; expectations on our growth strategy, expense initiatives, talent acquisition, and future profitability; expectations regarding our capital management, including our announced share repurchase program; and the assumptions underlying our expectations. Prospective investors are cautioned that any such forward-looking statements are not guarantees of future performance and involve known and unknown risks and uncertainties which may cause the actual results, performance or achievements of Synovus to be materially different from the future results, performance or achievements expressed or implied by such forward-looking statements. Forward-looking statements are based on the information known to, and current beliefs and expectations of, Synovus’ management and are subject to significant risks and uncertainties. Actual results may differ materially from those contemplated by such forward-looking statements. A number of factors could cause actual results to differ materially from those contemplated by the forward-looking statements in this press release. Many of these factors are beyond Synovus’ ability to control or predict.

These forward-looking statements are based upon information presently known to Synovus’ management and are inherently subjective, uncertain and subject to change due to any number of risks and uncertainties, including, without limitation, the risks and other factors set forth in Synovus’ filings with the Securities and Exchange Commission, including its Annual Report on Form 10-K for the year ended December 31, 2014 under the captions “Cautionary Notice Regarding Forward-Looking Statements” and “Risk Factors” and in Synovus’ quarterly reports on Form 10-Q and current reports on Form 8-K. We believe these forward-looking statements are reasonable; however, undue reliance should not be placed on any forward-looking statements, which are based on current expectations and speak only as of the date that they are made. We do not assume any obligation to update any forward-looking statements as a result of new information, future developments or otherwise, except as otherwise may be required by law.

Use of Non-GAAP Financial Measures

The measures entitled average core deposits; average core deposits excluding average state, county, and municipal deposits; tangible common equity to tangible assets ratio; adjusted net income per diluted common share; adjusted pre-tax, pre-credit costs income; adjusted non-interest income; and adjusted non-interest expense are not measures recognized under U.S. generally accepted accounting principles (GAAP) and therefore are considered non-GAAP financial measures. The most comparable GAAP measures are total average deposits; total shareholders’ equity to total assets ratio; net income per diluted common share; income before income taxes; total non-interest income; and total non-interest expense, respectively.

Synovus believes that these non-GAAP financial measures provide meaningful additional information about Synovus to assist management and investors in evaluating Synovus’ capital strength and the performance of its core business. These non-GAAP financial measures should not be considered as substitutes for total average deposits; total shareholders’ equity to total assets ratio; net income per diluted common share; income before income taxes; total non-interest income; and total non-interest expense determined in accordance with GAAP and may not be comparable to other similarly titled measures at other companies.

The computations of average core deposits; average core deposits excluding average state, county, and municipal deposits; tangible common equity to tangible assets ratio; adjusted net income per diluted common share; adjusted pre-tax, pre-credit costs income; adjusted non-interest income; and adjusted non-interest expense; and the reconciliation of these measures to total average deposits; total shareholders’ equity to total assets ratio; net income per diluted common share; income before income taxes; total non-interest income; and total non-interest expense are set forth in the tables below.