ex23

We hereby consent to the incorporation by reference in the Registration Statements on Form S-8 (Nos. 333-70218, 333-100885, 333-120955, 333-134973, 333-139819 and 333-180350) and in the Registration Statement on Form S-3 (No. 333-171596) of Northwest Natural Gas Company of our report dated March 1, 2013 relating to the consolidated financial statements, financial statement schedule and the effectiveness of internal control over financial reporting, which appears in this Form 10-K.