**Exhibit      31.1**

**CERTIFICATIONS      OF THE CHIEF EXECUTIVE OFFICER AND THE CHIEF FINANCIAL      OFFICER**

**Pursuant      to Securities Exchange Act Rules 13a-1 and 15d-14**

**As      adopted pursuant to Section 302 of the Sarbanes-Oxley Act of      2002**

| 1. | I                have reviewed this quarterly report on Form 10-Q of Peoples Bancorp,                Inc.; |
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| 2. | Based                on my knowledge, this report does not contain any untrue statement                of a                material fact or omit to state a material fact necessary to make                the                statement made, in light of the circumstances under which such statements                were made, not misleading with respect to the period covered by this                report; |
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| 3. | Based                on my knowledge, the financial statements, and other financial information                included in this 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 report; |
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| 4. | I                am responsible for establishing and maintaining disclosure controls                and                procedures (as defined in Exchange Act Rules 13a-15(e) and 15d-15(e))                for the registrant and have: |
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| 5. | I                have disclosed, based on my most recent evaluation of internal control                over financial reporting, to the registrant’s auditors and the audit                committee of the registrant’s board of directors (or persons performing                the equivalent functions): |
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| Date:                November 13, 2007 | /s/                Thomas G. Stevenson           |
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|                                        | Thomas                G. Stevenson               |
|                                   | President/Chief                Executive Officer |
|                                   | &                Chief Financial Officer     |

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