Blaby constituency was created in 1974 from parts of the Harborough seat. It is named after the village of Blaby in south west Leicestershire. A safe Conservative seat consisting mostly of middle-class commuter towns and villages for the neighbouring city of Leicester, it was held for many years by the former Chancellor of the ExchequerNigel Lawson. Lawson was succeeded in 1992 by Andrew Robathan, who held the seat until its abolition.
1974–1983: The Rural Districts of Blaby and Lutterworth.
1983–1997: The District of Blaby, and the District of Harborough wards of Broughton, Dunton, Gilmorton, Kilworth, Lutterworth Linden, Lutterworth St Mary's, Lutterworth Sherrier, Lutterworth Wycliffe, Peatling, and Ullesthorpe.
1997–2010: The District of Blaby wards of Cosby, Countesthorpe, Croft Hill, Enderby, Flamville, Fosse, Glen Parva, Millfield, Narborough, Normanton, Northfield, Ravenhurst, St John's, Stanton, Whetstone, Winchester, and Winstanley, and the District of Harborough wards of Broughton, Dunton, Gilmorton, Kilworth, Lutterworth Linden, Lutterworth St Mary's, Lutterworth Sherrier, Lutterworth Wycliffe, Peatling, and Ullesthorpe.