| 1) | I                  have reviewed this quarterly report on Form 10-Q of Horizon                  Bancorporation, Inc.; |
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| 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; |
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| 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; |
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| 4) | The                  registrant's other certifying officers and I are responsible for                  establishing and maintaining disclosure controls and procedures                  (as                  defined in Exchange Act Rules 13a-15(e) and 15d-15(e)) and internal                  control over financial reporting (as defined in Exchange Act Rules                  13a-15(f) and 15d-15(f)) for the registrant and we                  have: |
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|  | 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; |
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|  | b) | designed                  such internal control over financial reporting, or caused such                  internal                  control over financial reporting to be designed under our supervision,                  to                  provide reasonable assurance regarding the reliability of financial                  reporting and the preparation of financial statements for external                  purposes in accordance with generally accepted accounting                  principles; |
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|  | c) | evaluated                  the effectiveness of the registrant’s disclosure controls and procedures                  and presented in this report our conclusions about the effectiveness                  of                  the disclosure controls and procedures as of the end of the period                  covered                  by this report based on such evaluation;                  and |
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|  | d) | disclosed                  in this quarterly report any change in the registrant’s internal control                  over financial reporting that occurred during the registrant’s most recent                  fiscal quarter that has materially affected, or is reasonably likely                  to                  materially affect, the registrant’s internal control over financial                  reporting; |
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| 5) | The                  registrant's other certifying officers 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): |
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|  | a) | all                  significant deficiencies and material weakness in the design or                  operation                  of internal control over financial reporting which are reasonably                  likely                  to adversely affect the registrant's ability to record, process,                  summarize                  and report financial information;                  and |
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|  | b) | any                  fraud, whether or not material, that involves management or other                  employees who have a significant role in the registrant's internal                  control                  over financial reporting. |
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| Date:                May 12, 2008                    |   |
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|                                                 |   |
| /s/                Charles S. Conoley           |   |
| President                and Chief Executive Officer |   |

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