Exhibit 24

POWER OF ATTORNEY

KNOW ALL BY THESE PRESENTS: That the undersigned
officer and/or director of Tim Hortons Inc. (the Company), which is about to file a Form 10-K with the Securities and Exchange Commission, under the provisions of the Securities Exchange Act of 1934, as amended, hereby constitutes and
appoints Donald B. Schroeder, R. Scott Toop and Jill E. Aebker, signing singly, as his or her true and lawful attorneys-in-fact and agents, with full power of substitution and resubstitution, for him or her and in his or her name, place
and stead, in any and all capacities, to sign the Form 10-K, any and all amendments and documents related thereto, and to file the same, and all exhibits thereto, and other documents relating thereto, with the Securities and Exchange Commission, and
grants unto each of said attorneys-in-fact and substitute or substitutes full power and authority to do each and every act and thing requested and necessary to be done in and about the premises as fully to all intents and purposes as he or she might
do in person, and hereby ratifies and confirms all things that each of said attorneys-in-fact and substitute or substitutes may lawfully do and seek to be done by virtue hereof.

IN WITNESS WHEREOF, the undersigned has hereunto set his or her hand this 23rdday of February, 2011.



|                              |  |             |  |                                          
|----------------------------- |  | ----------- |  | -----------------------------------------
|/S/ RONALD W. OSBORNE
Witness |  | ) )
) )
) ) |  | /S/ PAUL D. HOUSE
Paul D. House, Director



---

POWER OF ATTORNEY

KNOW ALL BY THESE PRESENTS: That the undersigned officer and/or director of Tim Hortons Inc. (the Company), which is about to
file a Form 10-K with the Securities and Exchange Commission, under the provisions of the Securities Exchange Act of 1934, as amended, hereby constitutes and appoints Donald B. Schroeder, R. Scott Toop and Jill E. Aebker, signing singly,
as his or her true and lawful attorneys-in-fact and agents, with full power of substitution and resubstitution, for him or her and in his or her name, place and stead, in any and all capacities, to sign the Form 10-K, any and all amendments and
documents related thereto, and to file the same, and all exhibits thereto, and other documents relating thereto, with the Securities and Exchange Commission, and grants unto each of said attorneys-in-fact and substitute or substitutes full power and
authority to do each and every act and thing requested and necessary to be done in and about the premises as fully to all intents and purposes as he or she might do in person, and hereby ratifies and confirms all things that each of said
attorneys-in-fact and substitute or substitutes may lawfully do and seek to be done by virtue hereof.

IN
WITNESS WHEREOF, the undersigned has hereunto set his or her hand this 23rdday of February, 2011.



|                         |  |             |  |                                            
|------------------------ |  | ----------- |  | -------------------------------------------
|/S/ PINA MULHALL
Witness |  | ) )
) )
) ) |  | /S/ M. SHAN ATKINS
M. Shan Atkins, Director



---

POWER OF ATTORNEY

KNOW ALL BY THESE PRESENTS: That the undersigned officer and/or director of Tim Hortons Inc. (the Company), which is about to
file a Form 10-K with the Securities and Exchange Commission, under the provisions of the Securities Exchange Act of 1934, as amended, hereby constitutes and appoints Donald B. Schroeder, R. Scott Toop and Jill E. Aebker, signing singly,
as his or her true and lawful attorneys-in-fact and agents, with full power of substitution and resubstitution, for him or her and in his or her name, place and stead, in any and all capacities, to sign the Form 10-K, any and all amendments and
documents related thereto, and to file the same, and all exhibits thereto, and other documents relating thereto, with the Securities and Exchange Commission, and grants unto each of said attorneys-in-fact and substitute or substitutes full power and
authority to do each and every act and thing requested and necessary to be done in and about the premises as fully to all intents and purposes as he or she might do in person, and hereby ratifies and confirms all things that each of said
attorneys-in-fact and substitute or substitutes may lawfully do and seek to be done by virtue hereof.

IN
WITNESS WHEREOF, the undersigned has hereunto set his or her hand this 23rdday of February, 2011.



|                         |  |             |  |                                                  
|------------------------ |  | ----------- |  | -------------------------------------------------
|/S/ PINA MULHALL
Witness |  | ) )
) )
) ) |  | /S/ MICHAEL J. ENDRES
Michael J. Endres, Director



---

POWER OF ATTORNEY

KNOW ALL BY THESE PRESENTS: That the undersigned officer and/or director of Tim Hortons Inc. (the Company), which is about to
file a Form 10-K with the Securities and Exchange Commission, under the provisions of the Securities Exchange Act of 1934, as amended, hereby constitutes and appoints Donald B. Schroeder, R. Scott Toop and Jill E. Aebker, signing singly,
as his or her true and lawful attorneys-in-fact and agents, with full power of substitution and resubstitution, for him or her and in his or her name, place and stead, in any and all capacities, to sign the Form 10-K, any and all amendments and
documents related thereto, and to file the same, and all exhibits thereto, and other documents relating thereto, with the Securities and Exchange Commission, and grants unto each of said attorneys-in-fact and substitute or substitutes full power and
authority to do each and every act and thing requested and necessary to be done in and about the premises as fully to all intents and purposes as he or she might do in person, and hereby ratifies and confirms all things that each of said
attorneys-in-fact and substitute or substitutes may lawfully do and seek to be done by virtue hereof.

IN
WITNESS WHEREOF, the undersigned has hereunto set his or her hand this 22ndday of February, 2011.



|                            |  |             |  |                                            
|--------------------------- |  | ----------- |  | -------------------------------------------
|/S/ JOHN A. LEDERER
Witness |  | ) )
) )
) ) |  | /S/ MOYA M. GREENE
Moya M. Greene, Director



---

POWER OF ATTORNEY

KNOW ALL BY THESE PRESENTS: That the undersigned officer and/or director of Tim Hortons Inc. (the Company), which is about to
file a Form 10-K with the Securities and Exchange Commission, under the provisions of the Securities Exchange Act of 1934, as amended, hereby constitutes and appoints Donald B. Schroeder, R. Scott Toop and Jill E. Aebker, signing singly,
as his or her true and lawful attorneys-in-fact and agents, with full power of substitution and resubstitution, for him or her and in his or her name, place and stead, in any and all capacities, to sign the Form 10-K, any and all amendments and
documents related thereto, and to file the same, and all exhibits thereto, and other documents relating thereto, with the Securities and Exchange Commission, and grants unto each of said attorneys-in-fact and substitute or substitutes full power and
authority to do each and every act and thing requested and necessary to be done in and about the premises as fully to all intents and purposes as he or she might do in person, and hereby ratifies and confirms all things that each of said
attorneys-in-fact and substitute or substitutes may lawfully do and seek to be done by virtue hereof.

IN
WITNESS WHEREOF, the undersigned has hereunto set his or her hand this 23rdday of February, 2011.



|                         |  |             |  |                                              
|------------------------ |  | ----------- |  | ---------------------------------------------
|/S/ PINA MULHALL
Witness |  | ) )
) )
) ) |  | /S/ FRANK IACOBUCCI
Frank Iacobucci, Director



---

POWER OF ATTORNEY

KNOW ALL BY THESE PRESENTS: That the undersigned officer and/or director of Tim Hortons Inc. (the Company), which is about to
file a Form 10-K with the Securities and Exchange Commission, under the provisions of the Securities Exchange Act of 1934, as amended, hereby constitutes and appoints Donald B. Schroeder, R. Scott Toop and Jill E. Aebker, signing singly,
as his or her true and lawful attorneys-in-fact and agents, with full power of substitution and resubstitution, for him or her and in his or her name, place and stead, in any and all capacities, to sign the Form 10-K, any and all amendments and
documents related thereto, and to file the same, and all exhibits thereto, and other documents relating thereto, with the Securities and Exchange Commission, and grants unto each of said attorneys-in-fact and substitute or substitutes full power and
authority to do each and every act and thing requested and necessary to be done in and about the premises as fully to all intents and purposes as he or she might do in person, and hereby ratifies and confirms all things that each of said
attorneys-in-fact and substitute or substitutes may lawfully do and seek to be done by virtue hereof.

IN
WITNESS WHEREOF, the undersigned has hereunto set his or her hand this 23rdday of February, 2011.



|                           |  |             |  |                                              
|-------------------------- |  | ----------- |  | ---------------------------------------------
|/S/ MOYA M. GREENE
Witness |  | ) )
) )
) ) |  | /s/ JOHN A. LEDERER
John A. Lederer, Director



---

POWER OF ATTORNEY

KNOW ALL BY THESE PRESENTS: That the undersigned officer and/or director of Tim Hortons Inc. (the Company), which is about to
file a Form 10-K with the Securities and Exchange Commission, under the provisions of the Securities Exchange Act of 1934, as amended, hereby constitutes and appoints Donald B. Schroeder, R. Scott Toop and Jill E. Aebker, signing singly,
as his or her true and lawful attorneys-in-fact and agents, with full power of substitution and resubstitution, for him or her and in his or her name, place and stead, in any and all capacities, to sign the Form 10-K, any and all amendments and
documents related thereto, and to file the same, and all exhibits thereto, and other documents relating thereto, with the Securities and Exchange Commission, and grants unto each of said attorneys-in-fact and substitute or substitutes full power and
authority to do each and every act and thing requested and necessary to be done in and about the premises as fully to all intents and purposes as he or she might do in person, and hereby ratifies and confirms all things that each of said
attorneys-in-fact and substitute or substitutes may lawfully do and seek to be done by virtue hereof.

IN
WITNESS WHEREOF, the undersigned has hereunto set his or her hand this 22ndday of February, 2011.



|                         |  |             |  |                                          
|------------------------ |  | ----------- |  | -----------------------------------------
|/S/ PINA MULHALL
Witness |  | ) )
) )
) ) |  | /S/ DAVID H. LEES
David H. Lees, Director



---

POWER OF ATTORNEY

KNOW ALL BY THESE PRESENTS: That the undersigned officer and/or director of Tim Hortons Inc. (the Company), which is about to
file a Form 10-K with the Securities and Exchange Commission, under the provisions of the Securities Exchange Act of 1934, as amended, hereby constitutes and appoints Donald B. Schroeder, R. Scott Toop and Jill E. Aebker, signing singly, as his or
her true and lawful attorneys-in-fact and agents, with full power of substitution and resubstitution, for him or her and in his or her name, place and stead, in any and all capacities, to sign the Form 10-K, any and all amendments and documents
related thereto, and to file the same, and all exhibits thereto, and other documents relating thereto, with the Securities and Exchange Commission, and grants unto each of said attorneys-in-fact and substitute or substitutes full power and authority
to do each and every act and thing requested and necessary to be done in and about the premises as fully to all intents and purposes as he or she might do in person, and hereby ratifies and confirms all things that each of said attorneys-in-fact and
substitute or substitutes may lawfully do and seek to be done by virtue hereof.

IN WITNESS WHEREOF, the
undersigned has hereunto set his or her hand this
23rdday of February, 2011.



|                          |  |             |  |                                                  
|------------------------- |  | ----------- |  | -------------------------------------------------
|/S/ PAUL D. HOUSE
Witness |  | ) )
) )
) ) |  | /S/ RONALD W. OSBORNE
Ronald W. Osborne, Director



---

POWER OF ATTORNEY

KNOW ALL BY THESE PRESENTS: That the undersigned officer and/or director of Tim Hortons Inc. (the Company), which is about to
file a Form 10-K with the Securities and Exchange Commission, under the provisions of the Securities Exchange Act of 1934, as amended, hereby constitutes and appoints Donald B. Schroeder, R. Scott Toop and Jill E. Aebker, signing singly, as his or
her true and lawful attorneys-in-fact and agents, with full power of substitution and resubstitution, for him or her and in his or her name, place and stead, in any and all capacities, to sign the Form 10-K, any and all amendments and documents
related thereto, and to file the same, and all exhibits thereto, and other documents relating thereto, with the Securities and Exchange Commission, and grants unto each of said attorneys-in-fact and substitute or substitutes full power and authority
to do each and every act and thing requested and necessary to be done in and about the premises as fully to all intents and purposes as he or she might do in person, and hereby ratifies and confirms all things that each of said attorneys-in-fact and
substitute or substitutes may lawfully do and seek to be done by virtue hereof.

IN WITNESS WHEREOF, the
undersigned has hereunto set his or her hand this
23rdday of February, 2011.



|                                  |  |             |  |                                            
|--------------------------------- |  | ----------- |  | -------------------------------------------
|/S/ CATHERINE L. WILLIAMS
Witness |  | ) )
) )
) ) |  | /S/ WAYNE C. SALES
Wayne C. Sales, Director



---

POWER OF ATTORNEY

KNOW ALL BY THESE PRESENTS: That the undersigned officer and/or director of Tim Hortons Inc. (the Company), which is about to
file a Form 10-K with the Securities and Exchange Commission, under the provisions of the Securities Exchange Act of 1934, as amended, hereby constitutes and appoints Donald B. Schroeder, R. Scott Toop and Jill E. Aebker, signing singly, as his or
her true and lawful attorneys-in-fact and agents, with full power of substitution and resubstitution, for him or her and in his or her name, place and stead, in any and all capacities, to sign the Form 10-K, any and all amendments and documents
related thereto, and to file the same, and all exhibits thereto, and other documents relating thereto, with the Securities and Exchange Commission, and grants unto each of said attorneys-in-fact and substitute or substitutes full power and authority
to do each and every act and thing requested and necessary to be done in and about the premises as fully to all intents and purposes as he or she might do in person, and hereby ratifies and confirms all things that each of said attorneys-in-fact and
substitute or substitutes may lawfully do and seek to be done by virtue hereof.

IN WITNESS WHEREOF, the
undersigned has hereunto set his or her hand this
23rdday of February, 2011.



|                         |  |             |  |                                                          
|------------------------ |  | ----------- |  | ---------------------------------------------------------
|/S/ PINA MULHALL
Witness |  | ) )
) )
) ) |  | /S/ CATHERINE L. WILLIAMS
Catherine L. Williams, Director