EXHIBIT 21.1 INDIANA GAS COMPANY, INC. Subsidiaries Wholly Owned Subsidiaries: None. Less than Wholly Owned Subsidiaries: State of Incorporation/ Name of Entity (a) Jurisdiction Doing Business As - -------------------- ----------------------- ---------------------------- The Ohio operations Ohio Ohio operations and Vectren Energy Delivery of Ohio, Inc. (a) Significant subsidiary as calculated under Rule 1-02(w) of Regulation S-X.