Exhibit 23.1 INDEPENDENT AUDITORS' CONSENT The Board of Directors LSB Corporation: We consent to the incorporation by reference in the Registration Statement on Form S-8 (No. 333-65438) of LSB Corporation of our report dated January 17, 2003, with respect to the consolidated balance sheets of LSB Corporation and subsidiaries as of December 31, 2002 and 2001, and the related consolidated statements of operations, changes in stockholders' equity and cash flows for each of the years in the three-year period ended December 31, 2002, which report is incorporated by reference into the December 31, 2002 annual report on Form 10-K of LSB Corporation. /s/ KPMG LLP --------------------------- KPMG LLP Boston, Massachusetts March 27, 2003