Exhibit 32.2

Certification of Chief Financial Officer

In connection with the Annual Report of Hawthorn Bancshares, Inc. (the “Company”) on Form 10-K for the year ended December 31, 2011 as filed with the Securities and Exchange Commission (the “Report”), I, W. Bruce Phelps, Chief Financial Officer of the Company, hereby certify in accordance with 18 U.S.C. Section 1350, as adopted pursuant to Section 906 of the Sarbanes-Oxley Act of 2002, that:

(a) The Report fully complies with the requirements of Section 13(a) or 15(d) of the Securities Exchange Act of 1934, as amended; and

(b) The information contained in the Report fairly presents, in all material aspects, the financial condition and results of operations of the Company.

Dated: March 30, 2012

/s/ W. Bruce Phelps

W. Bruce Phelps

Chief Financial Officer

“A signed original of this written statement required by Section 906 has been provided to Hawthorn Bancshares, Inc. and will be retained by Hawthorn Bancshares, Inc. and furnished to the Securities and Exchange Commission or its staff upon request.”