Exhibit 99.1

FIRST FINANCIAL BANKSHARES ANNOUNCES

THIRD QUARTER EARNINGS RESULTS

ABILENE, Texas, October 16, 2014 – First Financial Bankshares, Inc. (NASDAQ: FFIN) today reported earnings for the third quarter of 2014 of $23.43 million, up 19.78 percent compared with earnings of $19.56 million in the same quarter last year. Basic earnings per share were $0.37 for the third quarter of 2014 compared with $0.31 in the same quarter a year ago.

Net interest income for the third quarter of 2014 increased 7.46 percent to $48.89 million compared with $45.49 million in the same quarter of 2013. The net interest margin, on a taxable equivalent basis, was 4.18 percent compared to 4.24 percent in the second quarter of 2014 and 4.25 percent in the same quarter last year. Included in interest income for the third quarter of 2014 was $536 thousand, or four basis points in net interest margin, related to discount accretion from fair value accounting related to the Orange and Huntsville acquisitions.

The provision for loan losses was $896 thousand in the third quarter of 2014 compared with $1.35 million in the same quarter last year and $1.12 million in the second quarter of 2014. Nonperforming assets as a percentage of loans and foreclosed assets totaled 0.83 percent at September 30, 2014, compared with 0.93 percent at June 30, 2014, and 1.09 percent at September 30, 2013. Classified loans totaled $81.39 million at September 30, 2014, compared to $79.93 million at June 30, 2014, and $81.67 million at September 30, 2013.

Noninterest income increased 1.46 percent in the third quarter of 2014 to $17.32 million compared with $17.08 million in the same quarter a year ago. Trust fees increased to $4.77 million in the third quarter of 2014 compared with $4.14 million in the same quarter last year, primarily due to continued growth in the fair value of Trust assets managed to $3.66 billion from $3.20 billion a year ago. ATM, interchange and credit card fees increased 15.64 percent to $5.09 million compared with $4.40 million in the same quarter last year due to a large growth in net new accounts and debit cards. Real estate mortgage fees decreased to $1.81 million in the third quarter of 2014 compared to $2.01 million in the same quarter last year due to the decline in the overall mortgage refinance market.

Noninterest expense for the third quarter of 2014 totaled $34.04 million compared to $35.53 million in the third quarter of 2013. Included in noninterest expense in the third quarter of 2013 were technology contract termination and conversion costs totaling $3.40 million related to the Company’s acquisition of Orange Savings Bank, SSB. There were no such expenses for the quarter ended September 30, 2014. The Company’s efficiency ratio in the third quarter of 2014 was 47.93 percent compared with 53.10 percent in the same quarter last year.

For the nine months ended September 30, 2014, net income increased 16.21 percent to $66.97 million from $57.63 million in the same period a year ago. Basic earnings per share rose to $1.05 from $0.91 for the same period last year. Net interest income increased 14.88 percent to $144.28 million for the nine months ended September 30, 2014 from $125.59 million in the same period a year ago. The provision for loan losses totaled $3.71 million compared with $2.58 million in the same period last year.

Noninterest income was $49.60 million for the first nine months of 2014 compared with $46.26 million in the same period a year ago. Noninterest expense rose to $101.49 million compared with $92.92 million in the same period a year ago.

As of September 30, 2014, consolidated assets for the Company totaled $5.58 billion compared with $5.08 billion a year ago. Loans totaled $2.84 billion at quarter end compared with loans of $2.61 billion a year ago. Total deposits grew 11.59 percent to $4.46 billion at September 30, 2014, compared to $4.00 billion a year ago. Shareholders’ equity rose to $658.77 million as of September 30, 2014, compared with $568.24 million at September 30, 2013.

“We are pleased to report another quarter of good growth in loans and deposits as well as solid earnings,” said F. Scott Dueser, Chairman, President and CEO. “We continue to pursue opportunities for acquisitions and focus on growing loans, cutting costs and increasing income.”

On April 22, 2014, the Company’s Board of Directors declared a two-for-one stock split in the form of a 100 percent stock dividend, which was effective June 2, 2014. All share and per share amounts in this earnings release have been restated to reflect this stock split.

All amounts for the quarters and nine months ended on September 30, 2014 and 2013 include the results of the Company’s acquisition of Orange Savings Bank, SSB, Orange, Texas, which was effective on May 31, 2013. As of the acquisition date, Orange had total loans of $293.29 million and total deposits of $385.95 million.

About First Financial Bankshares

Headquartered in Abilene, Texas, First Financial Bankshares is a financial holding company that operates 12 banking regions with 62 locations in Texas including Abilene, Acton, Albany, Aledo, Alvarado, Beaumont, Boyd, Bridgeport, Brock, Burleson, Cisco, Cleburne, Clyde, Decatur, Eastland, Fort Worth, Glen Rose, Granbury, Grapevine, Hereford, Huntsville, Keller, Mauriceville, Merkel, Midlothian, Mineral Wells, Moran, New Waverly, Newton, Odessa, Orange, Port Arthur, Ranger, Rising Star, Roby, San Angelo, Southlake, Stephenville, Sweetwater, Trent, Trophy Club, Vidor, Waxahachie, Weatherford and Willow Park. The Company also operates First Financial Trust & Asset Management Company, N.A., with eight locations and First Technology Services, Inc., a technology operating company.

The Company is listed on The NASDAQ Global Select Market under the trading symbol FFIN. For more information about First Financial Bankshares, please visit our website at http://www.ffin.com.

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Certain statements contained herein may be considered “forward-looking statements” as defined in the Private Securities Litigation Reform Act of 1995. These statements are based upon the belief of the Company’s management, as well as assumptions made beyond information currently available to the Company’s management, and may be, but not necessarily are, identified by such words as “expect”, “plan”, “anticipate”, “target”, “forecast” and “goal”. Because such “forward-looking statements” are subject to risks and uncertainties, actual results may differ materially from those expressed or implied by such forward-looking statements. Factors that could cause actual results to differ materially from the Company’s expectations include competition from other financial institutions and financial holding companies; the effects of and changes in trade, monetary and fiscal policies and laws, including interest rate policies of the Federal Reserve Board; changes in the demand for loans; fluctuations in value of collateral and loan reserves; inflation, interest rate, market and monetary fluctuations; changes in consumer spending, borrowing and savings habits; and acquisitions and integration of acquired businesses, and similar variables. Other key risks are described in the Company’s reports filed with the Securities and Exchange Commission, which may be obtained under “Investor Relations-Documents/Filings” on the Company’s Web site or by writing or calling the Company at 325.627.7155. Except as otherwise stated in this news announcement, the Company does not undertake any obligation to update publicly or revise any forward-looking statements because of new information, future events or otherwise.

FIRST FINANCIAL BANKSHARES, INC.

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FIRST FINANCIAL BANKSHARES, INC.

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