EXHIBIT 23 CONSENT OF INDEPENDENT ACCOUNTANTS We hereby consent to the incorporation by reference in the Registration Statements on Form S-8 of Northwest Natural Gas Company (Nos. 33-63017 and 33-63585, Post-Effective Amendment No. 1 to Registration Statement No. 2-76276, and Post-Effective Amendment No. 2 to Registration Statement No. 2-77195) and in the Registration Statements on Form S-3 of Northwest Natural Gas Company (Nos. 33-51271 and 33-53795, Amendment No. 1 to Registration Statement No. 333-15323, and Post-Effective Amendment No. 1 to Registration Statement Nos. 33-1304 and 33-20384) of our report dated May 16, 1997 relating to the financial statements of the Northwest Natural Gas Company Retirement K Savings Plan which appears as an attachment to this Form 11-K. PRICE WATERHOUSE LLP Portland, Oregon June 19, 1997