City Office REIT (CIO) 10-K 2018 FY Annual report

Exhibit 32.1

CERTIFICATION PURSUANT TO 18 U.S.C. SECTION 1350,

AS ADOPTED PURSUANT TO SECTION 906 OF THE SARBANES-OXLEY ACT OF 2002

In connection with this Annual Report onForm 10-K for the fiscal year ended December 31, 2018 of City Office REIT, Inc. (the “Company”) as filed with the Securities and Exchange Commission on the date hereof (the “Report”), I, James Farrar, Chief Executive Officer of the Company, certify, pursuant to 18 U.S.C. Section 1350, as adopted pursuant to Section 906 of the Sarbanes-Oxley Act of 2002, that, to my knowledge:

1. The Report fully complies with the requirements of section 13(a) or 15(d) of the Securities Exchange Act of 1934; and

2. The information contained in the Report fairly presents, in all material respects, the financial condition and results of operations of the Company.

February 27, 2019	/s/ James Farrar
Date	James Farrar Chief Executive Officer and Director (Principal Executive Officer)

This written report is being furnished to the Securities and Exchange Commission as an exhibit to the Report. A signed original of this written statement required by Section 906 has been provided to City Office REIT, Inc. and will be retained by City Office REIT, Inc. and furnished to the Securities and Exchange Commission or its staff upon request.