Exhibit 23.3

CONSENT OF INDEPENDENT REGISTERED PUBLIC ACCOUNTING FIRM

We consent to the incorporation by reference in this Amendment No. 1 to the Registration Statement on Form S-4 filed by F.N.B. Corporation of our report dated March 31, 2016, with respect to the consolidated balance sheets of NewBridge Bancorp and Subsidiary as of December 31, 2015 and 2014, and the related consolidated statements of income, comprehensive income, changes in shareholders’ equity and cash flows for each of the years in the three-year period ended December 31, 2015, incorporated herein by reference, and to the reference to our firm under the caption “Experts” in the Registration Statement.

/s/ Dixon Hughes Goodman LLP

Raleigh, North Carolina

October 13, 2016