POWER OF ATTORNEY

KNOW ALL MEN BY THESE PRESENTS, that the undersigned hereby constitutes and
appoints Stephen Allen and Pat Cipolla, or either of them, the undersigneds 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 individuals, 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 28th day of June, 2021.


/s/ Pierce H. Norton II


CONFIRMING STATEMENT

This Statement confirms that the undersigned has authorized and designated
Stephen Allen and Pat Cipolla, or either of them, 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 individuals are assuming any of the undersigneds responsibilities to
comply with Section 16 of the Securities Exchange Act of 1934.


/s/ Pierce H. Norton II

Dated:  June 28, 2021