POWER OF ATTORNEY

KNOW ALL MEN BY THESE PRESENTS, that the undersigned hereby
constitutes and appoints Eric Grimshaw, the undersigned's true and
lawful attorney-in-fact to:

(1) Execute for and on behalf of the undersigned, in the undersigneds
capacity as an officer and/or director of ONEOK, Inc. (the Corporation),
Forms 3, 4, and 5 in accordance with Section 16(a) of the Securities
Exchange Act of 1934 and the rules thereunder;

(2) Do and perform any and all acts for and on behalf of the undersigned
which may be necessary or desirable to complete and execute any such
Forms 3, 4, or 5 and timely file such form with the United States
Securities and Exchange Commission and any stock exchange or similar
authority;

(3) Take any other action of any type whatsoever in connection with
the foregoing which, in the opinion of such attorney-in-fact, may be
of benefit to, in the best interest of, or legally required by the
undersigned, it being understood that the documents executed by such
attorney-in-fact on behalf of the undersigned pursuant to this Power
of Attorney shall be in such form and shall contain the terms and
conditions as such attorney-in-fact may approve in such attorney-in-
facts discretion.

The undersigned hereby grants to each such attorney-in-fact full
power and authority to do and perform any and every act and thing
whatsoever requisite, necessary, or proper to be done in the exercise
of any of the rights and powers herein granted, as fully to all
intents and purposes as the undersigned might or could do if
personally present, with full power of revocation, hereby ratifying
and confirming all that each such attorney-in-fact shall lawfully
do or cause to be done by virtue of this power of attorney and the
rights and powers herein granted.  The undersigned acknowledges that
neither the Corporation nor the above-named individual, in serving
in such capacity at the request of the undersigned, are assuming any
of the undersigneds responsibilities to comply with Section 16 of the
Securities Exchange Act of 1934.

The Power of Attorney shall remain in full force and effect until the
undersigned is no longer required to file Forms 3, 4, and 5 with respect
to the undersigneds holdings of and transactions in securities issued by
the Corporation, unless earlier revoked by the undersigned in a signed
writing delivered to the foregoing attorney-in-fact.  This Power of
Attorney revokes all such special powers of attorney granted to
individuals in the past to act on behalf of the undersigned for
the purposes stated above.

IN WITNESS WHEREOF, the undersigned has caused this Power of Attorney
to be executed as of this 18th day of July, 2017.


/s/ STEPHEN B. ALLEN


CONFIRMING STATEMENT

This Statement confirms that the undersigned has authorized and
designated Eric Grimshaw, to execute and file on the undersigneds
behalf all Forms 3, 4, and 5 (including any amendments thereto) that
the undersigned may be required to file with the United States
Securities and Exchange Commission as a result of the undersigneds
ownership of or transactions in securities of ONEOK, Inc.  The authority
of the above-named individuals under this Statement shall continue
until the undersigned is no longer required to file Forms 3, 4, or 5
with regard to the undersigneds ownership of or transactions in
securities of ONEOK, Inc. unless earlier revoked in writing.  This
Statement revokes all such special powers of attorney granted to
individuals in the past to act on behalf of the undersigned
for the purposes stated above.  The undersigned acknowledges that
neither ONEOK, Inc. nor the above-named individual are assuming any
of the undersigneds responsibilities to comply with Section 16 of
the Securities Exchange Act of 1934.

/s/ STEPHEN B. ALLEN

Dated: JULY 18, 2017