Exhibit 24

POWER OF ATTORNEY

The undersigned director of GATX Corporation, a New York corporation, does hereby constitute and appoint Robert C. Lyons, Deborah A. Golden and William M. Muckian or any of them, attorneys and agents of the undersigned, with full power and authority to sign in such director's name, and on behalf of GATX Corporation, the Annual Report on Form 10-K for the year ended December 31, 2017, under the Securities Exchange Act of 1934, together with any amendments thereto, hereby ratifying and confirming all that said attorneys and agents and each of them may do by virtue hereof.

IN WITNESS WHEREOF, the undersigned has hereunto set his/her hand.

/s/ BRIAN A. KENNEY      

Brian A. Kenney

Director

Date: 2/14/2018

POWER OF ATTORNEY

The undersigned director of GATX Corporation, a New York corporation, does hereby constitute and appoint Robert C. Lyons, Deborah A. Golden and William M. Muckian or any of them, attorneys and agents of the undersigned, with full power and authority to sign in such director's name, and on behalf of GATX Corporation, the Annual Report on Form 10-K for the year ended December 31, 2017, under the Securities Exchange Act of 1934, together with any amendments thereto, hereby ratifying and confirming all that said attorneys and agents and each of them may do by virtue hereof.

IN WITNESS WHEREOF, the undersigned has hereunto set his/her hand.

/s/ DIANE AIGOTTI

Diane Aigotti

Director

Date: 2/19/2018

POWER OF ATTORNEY

The undersigned director of GATX Corporation, a New York corporation, does hereby constitute and appoint Robert C. Lyons, Deborah A. Golden and William M. Muckian or any of them, attorneys and agents of the undersigned, with full power and authority to sign in such director's name, and on behalf of GATX Corporation, the Annual Report on Form 10-K for the year ended December 31, 2017, under the Securities Exchange Act of 1934, together with any amendments thereto, hereby ratifying and confirming all that said attorneys and agents and each of them may do by virtue hereof.

IN WITNESS WHEREOF, the undersigned has hereunto set his/her hand.

/s/ ANNE L. ARVIA       

Anne L. Arvia

Director

Date: 2/14/2018

POWER OF ATTORNEY

The undersigned director of GATX Corporation, a New York corporation, does hereby constitute and appoint Robert C. Lyons, Deborah A. Golden and William M. Muckian or any of them, attorneys and agents of the undersigned, with full power and authority to sign in such director's name, and on behalf of GATX Corporation, the Annual Report on Form 10-K for the year ended December 31, 2017, under the Securities Exchange Act of 1934, together with any amendments thereto, hereby ratifying and confirming all that said attorneys and agents and each of them may do by virtue hereof.

IN WITNESS WHEREOF, the undersigned has hereunto set his/her hand.

/s/ ERNST A. HÄBERLI

Ernst A. Häberli

Director

Date: 2/16/2018

POWER OF ATTORNEY

The undersigned director of GATX Corporation, a New York corporation, does hereby constitute and appoint Robert C. Lyons, Deborah A. Golden and William M. Muckian or any of them, attorneys and agents of the undersigned, with full power and authority to sign in such director's name, and on behalf of GATX Corporation, the Annual Report on Form 10-K for the year ended December 31, 2017, under the Securities Exchange Act of 1934, together with any amendments thereto, hereby ratifying and confirming all that said attorneys and agents and each of them may do by virtue hereof.

IN WITNESS WHEREOF, the undersigned has hereunto set his/her hand.

/s/ JAMES B. REAM

James B. Ream

Director

Date: 2/14/2018

POWER OF ATTORNEY

The undersigned director of GATX Corporation, a New York corporation, does hereby constitute and appoint Robert C. Lyons, Deborah A. Golden and William M. Muckian or any of them, attorneys and agents of the undersigned, with full power and authority to sign in such director's name, and on behalf of GATX Corporation, the Annual Report on Form 10-K for the year ended December 31, 2017, under the Securities Exchange Act of 1934, together with any amendments thereto, hereby ratifying and confirming all that said attorneys and agents and each of them may do by virtue hereof.

IN WITNESS WHEREOF, the undersigned has hereunto set his/her hand.

/s/ ROBERT J. RITCHIE   

Robert J. Ritchie

Director

Date: 2/17/2018

POWER OF ATTORNEY

The undersigned director of GATX Corporation, a New York corporation, does hereby constitute and appoint Robert C. Lyons, Deborah A. Golden and William M. Muckian or any of them, attorneys and agents of the undersigned, with full power and authority to sign in such director's name, and on behalf of GATX Corporation, the Annual Report on Form 10-K for the year ended December 31, 2017, under the Securities Exchange Act of 1934, together with any amendments thereto, hereby ratifying and confirming all that said attorneys and agents and each of them may do by virtue hereof.

IN WITNESS WHEREOF, the undersigned has hereunto set his/her hand.

/s/ DAVID S. SUTHERLAND

David S. Sutherland

Director

Date: 2/15/2018

POWER OF ATTORNEY

The undersigned director of GATX Corporation, a New York corporation, does hereby constitute and appoint Robert C. Lyons, Deborah A. Golden and William M. Muckian or any of them, attorneys and agents of the undersigned, with full power and authority to sign in such director's name, and on behalf of GATX Corporation, the Annual Report on Form 10-K for the year ended December 31, 2017, under the Securities Exchange Act of 1934, together with any amendments thereto, hereby ratifying and confirming all that said attorneys and agents and each of them may do by virtue hereof.

IN WITNESS WHEREOF, the undersigned has hereunto set his/her hand.

/s/ CASEY J. SYLLA

Casey J. Sylla

Director

Date: 2/16/2018

POWER OF ATTORNEY

The undersigned director of GATX Corporation, a New York corporation, does hereby constitute and appoint Robert C. Lyons, Deborah A. Golden and William M. Muckian or any of them, attorneys and agents of the undersigned, with full power and authority to sign in such director's name, and on behalf of GATX Corporation, the Annual Report on Form 10-K for the year ended December 31, 2017, under the Securities Exchange Act of 1934, together with any amendments thereto, hereby ratifying and confirming all that said attorneys and agents and each of them may do by virtue hereof.

IN WITNESS WHEREOF, the undersigned has hereunto set his/her hand.

/s/ STEPHEN R. WILSON

Stephen R. Wilson

Director

Date: 2/14/2018

POWER OF ATTORNEY

The undersigned director of GATX Corporation, a New York corporation, does hereby constitute and appoint Robert C. Lyons, Deborah A. Golden and William M. Muckian or any of them, attorneys and agents of the undersigned, with full power and authority to sign in such director's name, and on behalf of GATX Corporation, the Annual Report on Form 10-K for the year ended December 31, 2017, under the Securities Exchange Act of 1934, together with any amendments thereto, hereby ratifying and confirming all that said attorneys and agents and each of them may do by virtue hereof.

IN WITNESS WHEREOF, the undersigned has hereunto set his/her hand.

/s/ PAUL G. YOVOVICH

Paul G. Yovovich

Director

Date: 2/14/2018