**Exhibit 31.1**

**MAC-GRAY CORPORATIONCERTIFICATION PURSUANT TO SECTION 302 OFSARBANES-OXLEY ACT OF 2002**

**CERTIFICATIONS**

I,Stewart G. MacDonald, Jr., Chief Executive Officer and Chairman of theBoard of Directors, certify that:

1.                 Ihave reviewed this annual report on Form 10-K of Mac-GrayCorporation (the registrant);

2.                 Basedon my knowledge, this annual report does not contain any untrue statement of amaterial fact or omit to state a material fact necessary to make the statementsmade, in light of the circumstances under which such statements were made, notmisleading with respect to the period covered by this report;

3.                 Basedon my knowledge, the financial statements, and other financial informationincluded in this report, fairly present in all material respects the financialcondition, results of operations and cash flows of the registrant as of, andfor, the periods presented in this report;

4.                 Theregistrant’s other certifying officers and I are responsible for establishingand maintaining disclosure controls and procedures (as defined in Exchange Act Rules 13a-15(e) and15d-15(e)) and internal control over financial reporting (as defined inExchange Act Rules 13a-15(f) and 15d-15(f)) for theregistrant and we have:

a)               designedsuch disclosure controls and procedures, or caused such disclosure controls andprocedures to be designed under our supervision, to ensure that materialinformation relating to the registrant, including its consolidatedsubsidiaries, is made known to us by others within those entities, particularlyduring the period in which this report is being prepared;

b)              designedsuch internal control over financial reporting, or caused such internal controlover financial reporting to be designed under our supervision, to providereasonable assurance regarding the reliability of financial reporting and thepreparation of financial statements for external purposes in accordance withgenerally accepted accounting principles;

c)               evaluatedthe effectiveness of the registrant’s disclosure controls and proceduresand  presented in this report ourconclusions about the effectiveness of the disclosure controls and proceduresas of the end of the period covered by this report based on such evaluation;and

d)              disclosedin this report any change in the registrant’s internal control over financialreporting that occurred during the registrant’s most recent fiscal quarter (theregistrant’s fourth fiscal quarter in the case of an annual report) that hasmaterially affected, or is reasonably likely to materially affect, theregistrant’s internal control over financial reporting; and

5.                 Theregistrant’s other certifying officers and I have disclosed, based on our mostrecent evaluation of internal control over financial reporting to theregistrant’s auditors and the audit committee of the registrant’s board ofdirectors (or persons performing the equivalent functions):

a)               allsignificant deficiencies and material weaknesses in the design or operation ofinternal control over financial reporting which are reasonably likely toadversely affect the registrant’s ability to record, process, summarize andreport financial information; and

b)              anyfraud, whether or not material, that involves management or other employees whohave a significant role in the registrant’s internal control over financialreporting.

| Date:  March 16, 2007 |     | /s/ STEWART G.  MACDONALD, JR. |
|----------------------------|----------|-------------------------------------|
|                       |     | Stewart G.  MacDonald, Jr.     |
|                       |     | Chief Executive  Officer and        |
|                       |     | Chairman of the  Board of Directors |
| * *                   | * * | *(Principal  Executive Officer)*    |

 

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