EXHIBIT 31
                                                            CERTIFICATIONS

I, Gary L. Tice, certify that:
     1. I have reviewed this quarterly report on Form 10-Q of F.N.B.
        Corporation;
     2. Based on my knowledge, this quarterly report does not contain any untrue
        statement of a material fact or omit to state a material fact necessary
        to make the statements made, in light of the circumstances under which
        such statements were made, not misleading with respect to the period
        covered by this quarterly report;
     3. Based on my knowledge, the financial statements, and other financial
        information included in this quarterly report, fairly present in all
        material respects the financial condition, results of operations and
        cash flows of the registrant as of, and for, the periods presented in
        this quarterly report;
     4. The registrant's other certifying officer and I are responsible for
        establishing and maintaining disclosure controls and procedures
        (as defined in Exchange Act Rules 13a-14 and 15d-14) for the registrant
        and we have:
          a) designed such disclosure controls and procedures to ensure that
             material information relating to the registrant, including its
             consolidated subsidiaries, is made known to us by others within
             those entities, particularly during the period in which this
             quarterly report is being prepared;
          b) evaluated the effectiveness of the registrant's disclosure controls
             and procedures as of a date within 90 days prior to the filing date
             of this quarterly report (the "Evaluation Date"); and
          c) presented in this quarterly report our conclusions about the
             effectiveness of the disclosure controls and procedures based on
             our evaluation as of the Evaluation Date;
     5. The registrant's other certifying officer and I have disclosed, based
        on our most recent evaluation, to the registrant's auditors and the
        audit committee of registrant's board of directors (or persons
        performing the equivalent function):
          a) all significant deficiencies in the design or operation of internal
             controls which could adversely affect the registrant's ability to
             record, process, summarize and report financial data and have
             identified for the registrant's auditors any material weaknesses
             in internal controls; and
          b) any fraud, whether or not material, that involves management or
             other employees who have a significant role in the registrant's
             internal controls; and
     6. The registrant's other certifying officer and I have indicated in this
        quarterly report whether or not there were significant changes in
        internal controls or in other factors that could significantly affect
        internal controls subsequent to the date of our most recent evaluation,
        including any corrective actions with regard to significant deficiencies
        and material weaknesses.


Date: November 14, 2003
                                               /s/Gary L. Tice
                                               Gary L. Tice
                                               President and
                                               Chief Executive Officer




                                                        EXHIBIT 31 (continued)


I,  Thomas E. Fahey, certify that:

     1. I have reviewed this quarterly report on Form 10-Q of F.N.B.
        Corporation;
     2. Based on my knowledge, this quarterly report does not contain any untrue
        statement of a material fact or omit to state a material fact necessary
        to make the statements made, in light of the circumstances under which
        such statements were made, not misleading with respect to the period
        covered by this quarterly report;
     3. Based on my knowledge, the financial statements, and other financial
        information included in this quarterly report, fairly present in all
        material respects the financial condition, results of operations and
        cash flows of the registrant as of, and for, the periods presented in
        this quarterly report;
     4. The registrant's other certifying officer and I are responsible for
        establishing and maintaining disclosure controls and procedures
        (as defined in Exchange Act Rules 13a-14 and 15d-14) for the registrant
        and we have:
          a) designed such disclosure controls and procedures to ensure that
             material information relating to the registrant, including its
             consolidated subsidiaries, is made known to us by others within
             those entities, particularly during the period in which this
             quarterly report is being prepared;
          b) evaluated the effectiveness of the registrant's disclosure controls
             and procedures as of a date within 90 days prior to the filing date
             of this quarterly report (the "Evaluation Date"); and
          c) presented in this quarterly report our conclusions about the
             effectiveness of the disclosure controls and procedures based on
             our evaluation as of the Evaluation Date;
     5. The registrant's other certifying officer and I have disclosed, based
        on our most recent evaluation, to the registrant's auditors and the
        audit committee of registrant's board of directors (or persons
        performing the equivalent function):
          a) all significant deficiencies in the design or operation of internal
             controls which could adversely affect the registrant's ability to
             record, process, summarize and report financial data and have
             identified for the registrant's auditors any material weaknesses
             in internal controls; and
          b) any fraud, whether or not material, that involves management or
             other employees who have a significant role in the registrant's
             internal controls; and
     6. The registrant's other certifying officer and I have indicated in this
        quarterly report whether or not there were significant changes in
        internal controls or in other factors that could significantly affect
        internal controls subsequent to the date of our most recent evaluation,
        including any corrective actions with regard to significant deficiencies
        and material weaknesses.


Date: November 14, 2003
                                               /s/Thomas E. Fahey
                                               Thomas E. Fahey
                                               Executive Vice President and
                                               Chief Financial Officer