Exhibit 99.1

Synovus Announces Earnings for the Second Quarter 2017

Diluted Earnings per Share of $0.60, up 29.6% vs. 2Q16

COLUMBUS, Ga., July 18, 2017 – Synovus Financial Corp. (NYSE: SNV) today reported financial results for the quarter ended June 30, 2017.

Second Quarter Highlights

“We are pleased with our second quarter performance, highlighted by a 30 percent year-over-year increase in earnings per share,” said Kessel Stelling, Synovus chairman and CEO. “Profitability continued to improve as we delivered a 1 percent return on assets and an efficiency ratio below 60 percent for the quarter. We also celebrated being named ‘Most Reputable Bank’ by American Banker magazine and the Reputation Institute. Our team is honored by this recognition from both customers and non-customers, and further energized about our transition to a unified Synovus brand in 2018.”

Balance Sheet

Core Performance

Credit Quality

Capital Ratios

Second Quarter Earnings Conference Call

Synovus will host an earnings highlights conference call at 8:30 a.m. EDT on July 18, 2017. 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 investor.synovus.com/event. The replay will be archived for 12 months and will be available 30-45 minutes after the call.

Synovus Financial Corp.

Synovus Financial Corp. is a financial services company based in Columbus, Georgia, with approximately $31 billion in assets. Synovus provides commercial and retail banking, investment, and mortgage services through 248 branches in Georgia, Alabama, South Carolina, Florida, and Tennessee. Synovus Bank, a wholly owned subsidiary of Synovus, was recognized as the “Most Reputable Bank” by American Banker and the Reputation Institute in 2017, and was named “Best Regional Bank, Southeast” by MONEY Magazine for 2016-17. 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 regarding deposits, loan growth and the net interest margin; expectations on our growth strategy, expense initiatives, strategic transactions, our brand initiatives, capital management and future profitability; expectations on credit trends and key credit metrics; 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, 2016 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 average core transaction deposits; adjusted non-interest income; adjusted non-interest expense; adjusted efficiency ratio; tangible common equity ratio; and common equity Tier 1 (CET1) ratio (fully phased-in) 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 non-interest income; total non-interest expense; efficiency ratio; return on average common equity and total shareholders’ equity to total assets ratio, respectively.

Synovus believes that these non-GAAP financial measures provide meaningful additional information about Synovus to assist management, investors, and bank regulators in evaluating Synovus’ operating results, financial strength and capitalization, and the performance of its business and the strength of its capital position, but they have inherent limitations as analytical tools and should not be considered in isolation or as a substitute for analyses of results as reported under GAAP. Average core transaction deposits are a measure used by management to evaluate organic growth of deposits and the quality of deposits as a funding source. Adjusted non-interest income is a measure utilized by management to measure non-interest income exclusive of net investment securities gains and decrease in fair value of private equity investments, net. Adjusted non-interest expense and the adjusted efficiency ratio are measures utilized by management to measure the success of expense management initiatives focused on reducing recurring controllable operating costs. The tangible common equity ratio and common equity Tier 1 (CET1) ratio (fully phased-in) are used by management and bank regulators to assess the strength of our capital position. These non-GAAP financial measures should be considered as additional views of the way our financial measures are affected by significant items and other factors, and since they are not required to be uniformly applied, they may not be comparable to other similarly titled measures at other companies and should not be considered as substitutes for total average deposits; total non-interest income; total non-interest expense; efficiency ratio; return on average common equity and total shareholders’ equity to total assets ratio determined in accordance with GAAP and may not be comparable to other similarly titled measures at other companies.

The computations of average core transaction deposits; adjusted non-interest income; adjusted non-interest expense; adjusted efficiency ratio; tangible common equity ratio; and common equity Tier 1 (CET1) ratio (fully phased-in) and the reconciliation of these measures total average deposits; total non-interest income; total non-interest expense; efficiency ratio; return on average common equity; and total shareholders’ equity to total assets ratio are set forth in the tables below.

Reconciliation of Non-GAAP Financial Measures

Reconciliation of Non-GAAP Financial Measures, continued