Roads of the Mid-South & West > Highways of the Commonwealth of Pennsylvania > Pennsylvania State Route 405 > Pennsylvania State Route 405, Northumberland County

Pennsylvania State Route 405 Northumberland County

Pennsylvania State Route 405 is a north-south highway in Western Northumberland County. It runs from Pennsylvania State Route 61, at Sunbury, to the Northumberland/Lycoming County Line, near Montgomery.

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PA St Rt 405 passes through the following towns in Northumberland County.
Sunbury
Northumberland

Kapp Heights
Chillisquaque
Milton

Watsontown
Dewart

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PA St Rt 405 is multi-plexed in Northumberland County.
U.S. Rt. 11, at Northumberland.

Pennsylvania State Route 44, from Watsontown to Dewart.
Pennsylvania State Route 54, near Dewart.

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PA St Rt 405 crosses the following highways in Northumberland County.
Pennsylvania State Route 61, at Sunbury.

TRUCK Pennsylvania State Route 61, at Sunbury.
U.S. Rt. 11, at Northumberland.

U.S. Rt. 11, at Northumberland.

Pennsylvania State Route 147, near Winfield. (NO Direct Interchange)
Pennsylvania State Route 45, near Lewisburg.
Pennsylvania State Route 642, at Milton.
Pennsylvania State Route 254, at Milton.
Interstate 80, near New Columbia. (NO Interchange)
Pennsylvania State Route 44, at Watsontown.
Pennsylvania State Route 44, at Dewart.
Pennsylvania State Route 54, near Dewart.

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A junction marker on NB PA St Rt 61.

NB PA St Rt 405 north of PA St Rt 61.

NB PA St Rt 405 south of Shikellamy Ave.

NB PA St Rt 405 crossing the Susquahanna River.

NB PA St Rt 405 at Priestley Ave.

NB PA St Rt 405 at north U.S. Rt. 11.

SB U.S. Rt. 11/NB PA St Rt 405 at Queen Street.

A guide marker on EB PA St Rt 45.

SB PA St Rt 405 south of PA St Rt 45.

SB PA St Rt 405 north of PA St Rt 642.

SB PA St Rt 405 near Center Street.

A junction marker on WB PA St Rt 254.

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8 September 2025