Certification Pursuant to 18 U.S.C. Section 1350,

As Adopted Pursuant to

Section 906 of the Sarbanes-Oxley Act of 2002

Name of Issuer: Prudential Institutional Liquidity Portfolio, Inc.

In connection with the Report on Form N-CSR of the above-named issuer that is accompanied by this certification, the undersigned hereby certifies, to his or her 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 Issuer.

Date: November 28, 2005	/s/ Judy A. Rice
	Judy A. Rice
	President and Principal Executive Officer
Date: November 28, 2005	/s/ Jack Benintende
	Jack Benintende
	Acting Treasurer and Principal Financial Officer