Vectren Energy Delivery Of Ohio S-3 Shelf registration

Exhibit 23.1

CONSENT OF INDEPENDENT REGISTERED PUBLIC ACCOUNTING FIRM

We consent to the incorporation by reference in this Registration Statement on Form S-3 of our report dated February 23, 2005, relating to the financial statements and financial statement schedule of Vectren Utility Holdings, Inc. appearing in the Annual Report on Form 10-K of Vectren Utility Holdings, Inc. for the year ended December 31, 2004 and to the reference to us under the heading “Experts” in the Prospectus, which is part of this Registration Statement.

/s/ DELOITTE & TOUCHE LLP

Indianapolis, Indiana

September 12, 2005