POWER OF ATTORNEY

1.	Appointment

	BY THIS POWER OF ATTORNEY, I,
the undersigned Director of SPSS Inc., a Delaware Corporation (the
"Company"), HEREBY APPOINT MR. EDWARD HAMBURG, EXECUTIVE VICE PRESIDENT,
CORPORATE OPERATIONS, CHIEF FINANCIAL OFFICER AND SECRETARY OF THE COMPANY,
MR. ANTHONY CIRO, VICE PRESIDENT, LEGAL COUNSEL OF THE COMPANY, AND MR.
ROBERT BRINKMANN, ASSISTANT SECRETARY, TREASURER AND CONTROLLER OF THE
COMPANY, AT 233 SOUTH WACKER DRIVE, 11TH FLOOR, CHICAGO, ILLINOIS  60606,
to be my Attorney and in my name and on my behalf and as my Attorney do any
act and deed or otherwise to negotiate, determine and approve the final
form and content of, complete, sign, execute, exchange and deliver any and
all agreements, documents, letters, forms, instruments of transfer,
consents, and other documents, and to do any and all acts and things as may
be necessary or, in the opinion of my Attorney, desirable or incidental
thereto in connection with or for the purposes of executing documents in
connection with the requirements of Section 16(a) of the Securities
Exchange Act of 1934 and the rules and regulations promulgated thereunder
(the "Section 16 Reporting Requirements").

2.	Intention and
Ratification

	I HEREBY UNDERTAKE to ratify and confirm all acts and
things done or lawfully caused to be done and all agreements, documents,
letters, forms, instruments of transfer, consents and other documents,
approved, completed, signed, executed and delivered whatsoever by my
Attorney in my name and on my behalf in pursuance of the authority
conferred in this Power of Attorney and I accept full responsibility for
the contents of the documents referred to above which may be approved,
completed, signed, executed and delivered by my Attorney in my name and on
my behalf.

3.	Indemnity

	I FURTHER UNDERTAKE to indemnify and keep
indemnified my Attorney from and against all losses, liabilities, costs,
claims, actions, expenses, proceedings and obligations incurred or suffered
by my Attorney by reason directly or indirectly of the exercise or
purported exercise of any power conferred upon him or
her.

4.	Duration

	I HEREBY DECLARE that the authority conferred by
this Power of Attorney shall be effective as of August 29, 2002 and shall
be irrevocable for a period of one year thereafter.


IN WITNESS
WHEREOF, I have executed and delivered this Power of Attorney this 21st day
of August, 2002.

Name:  /s/ Kenneth H. Holec



Specimen signature
of Attorney-in-Fact


/s/ Edward Hamburg
Edward Hamburg


/s/
Anthony Ciro
Anthony Ciro


/s/ Robert Brinkmann
Robert
Brinkmann


STATE OF North Carolina )
			SS.
COUNTY OF Wake )

The
undersigned, a notary public in and for the above county and state,
certifies that Kenneth Holec has caused this Power of Attorney to be
executed and is known to me to be the same person whose name is subscribed
above, appeared before me in person and acknowledged signing and delivering
the instrument as his free and voluntary act, for the uses and purposes
therein set forth, and certified to the correctness of the signature of the
Attorney-in-Fact.

Dated:  August 21, 2002

/s/ Sue Creech
Clark
Notary Public


My commission expires:
April 9, 2006