EXHIBIT 23 INDEPENDENT AUDITORS' CONSENT P. H. Glatfelter Company: We consent to the incorporation by reference in the Registration Statements of P. H. Glatfelter Company on Form S-8 (Registration Nos. 33-25884, 33-37198, 33-49660, 33-53338, 33-54409, 33-62331, 333-12089, 333-26587, 333-34797, 333-53977 and 333-66991) of our report dated February 28, 2002, appearing in this Annual Report on Form 10-K of P. H. Glatfelter Company for the year ended December 31, 2001. /s/ Deloitte & Touche LLP Philadelphia, Pennsylvania March 25, 2002