EXHIBIT
31.1  CERTIFICATION
PURSUANT TO SECTION 302
OF THE SARBANES-OXLEY ACT OF 2002  I, Charles B. Westling,
certify that:  1.             I have reviewed this annual report on Form 10-K of
Datalink Corporation (the Registrant);  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 statements made, in light of the circumstances under which such
statements were made, not misleading with respect to the period covered by this
report;  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;  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-15(e) and 15d-15(e)) and
internal control over financial reporting (as defined in Exchange Act Rules 13a-15(f) and
15(d)-15(f) for the Registrant and we have:  (a)           designed such disclosure controls and
procedures, or caused such disclosure controls and procedures to be designed
under our supervision, 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
report is being prepared;  (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;  (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  (d)           disclosed in this report any change
in the Registrants internal control over financial reporting (as defined in
Exchange Act Rules 13a-15(f) and 15d-15(f)) that occurred during the
Registrants most recent fiscal quarter (the Registrants fourth fiscal quarter
in the case of an annual report) that has materially affected, or is reasonably
likely to materially affect, the Registrants internal control over financial
reporting; and  5.             The Registrants other certifying officer and I have
disclosed, based on our 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):  (a)           all significant deficiencies and
material weaknesses 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  (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.  Date:
  March 28, 2008By:
  /s/
  Charles B. WestlingCharles B.
  Westling, President and Chief Executive Officer


CERTIFICATION
PURSUANT TO SECTION 302
OF THE SARBANES-OXLEY ACT OF 2002  I, Gregory T. Barnum,
certify that:  1.             I have reviewed this annual report on Form 10-K of
Datalink Corporation (the Registrant);  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 statements made, in light of the circumstances under which such
statements were made, not misleading with respect to the period covered by this
report;  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;  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-15(e) and 15d-15(e)) and
internal control over financial reporting (as defined in Exchange Act Rules 13a-15(f) and
15(d)-15(f) for the Registrant and we have:  (a)           designed such disclosure controls and
procedures, or caused such disclosure controls and procedures to be designed
under our supervision, 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 report is
being prepared;  (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;  (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  (d)           disclosed in this report any change
in the Registrants internal control over financial reporting (as defined in
Exchange Act Rules 13a-15(f) and 15d-15(f)) that occurred during the
Registrants most recent fiscal quarter (the Registrants fourth fiscal quarter
in the case of an annual report) that has materially affected, or is reasonably
likely to materially affect, the Registrants internal control over financial
reporting; and  5.             The Registrants other certifying officer and I have
disclosed, based on our 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):  (a)           all significant deficiencies and
material weaknesses 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  (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.  Date:
  March 28, 2008By:
  /s/
  Gregory T. BarnumGregory T.
  Barnum, Vice President of Finance and Chief
  Financial Officer (Principal Financial Officer)