EXHIBIT 99.1

                                CERTIFICATION OF
                      CHIEF EXECUTIVE OFFICER OF ICO, INC.
                          PURSUANT TO 18 U.S.C. 1350

In  connection  with  the accompanying report on Form 10-Q for the period ending
March 31, 2003 and filed with the Securities and Exchange Commission on the date
hereof (the "Report"), I, Timothy J. Gollin, the Chief Executive Officer of ICO,
Inc.  (the  "Company"),  hereby  certify,  to  my  knowledge,  that:

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
     in  respect  of  those  items required to be described or presented in such
     Report  under Section 13(a) or Section 15(d) of the Securities Exchange Act
     of  1934.

/s/ Timothy J. Gollin
-----------------------------
Name:     Timothy J. Gollin
Date:     May 14, 2003

This  certification  is  furnished  solely  pursuant  to  Section  906  of  the
Sarbanes-Oxley Act of 2002 and shall not be deemed to be a part of the Report or
"filed"  for  any  purpose  whatsoever.