The Motorway D61 (Slovak: diaľnica D61) was a motorway in Slovakia, which was merged with the Motorway D1 in 1999. Its route was: Bratislava (D2) - Trnava (R1), before 1999 D65) - Piešťany - Trenčín (junction with old D1).
Most of the D61 part of new D1 highway is still marked with old kilometres (except in some parts of Bratislava).