Expressway S61 (Poland)

Expressway S61
Droga ekspresowa S61
Route information
Length	200 km (120 mi) 213.5 km (133 mi) total planned length [1]
Major junctions
From	S 8 near Ostrów Mazowiecka
To	A 5 Budzisko, Polish-Lithuanian border
Location
Country	Poland
Highway system
National roads in Poland Voivodeship roads
← S 52 → S 74

Expressway S61 or express road S61 is a Polish highway which is going to run from Ostrów Mazowiecka (separating from express road S8) to the Polish-Lithuanian border near Budzisko (continuing as the Lithuanian A5 highway).

As of June 2024, 200 km (120 mi) of the route are open to traffic. The remaining 13 km (8.1 mi) are planned to be opened (partially as single-carriageway) in the second half of 2024 and finished (as dual-carriageway) in mid-2025.

The road is part of the strategically important Via Baltica, the segment from Tallinn to Warsaw of the European route E67 connecting the Baltic States with the rest of Europe through the exposed Suwałki corridor. Its north-eastern end is also part of the planned Via Carpathia. Across the Lithuanian border the preexisting A5 highway to Kaunas is being upgraded into a divided highway with grade-separated junctions, bringing it to the same standard as the S61 expressway.