Michiana
n.— «Salvation Army officials are urging Michiana residents to donate to bell ringers at the red kettles because of an increased demand for help. Donations are trickling in at a much slower pace than usual, according to Major James Nauta, divisional commander of the western Michigan and northern Indiana division.» —“Salvation Army issues pleas for donations to bell ringers” South Bend Tribune (Indiana) Dec. 5, 2006. (source: Double-Tongued Dictionary)
This word is a contraction of the two states stradled by this region, namely Michigan and Indiana.