title: List of numbered roads in Northumberland County
text: # List of numbered roads in Northumberland County
  
  This is a list of numbered roads in Northumberland County, Ontario, Canada.
  
  | County road # | Local name(s) | Southern/western terminus | Northern/eastern terminus | Settlements served | Additional notes |
  | - | - | - | - | - | - |
  | 2 | County Road 2, various town streets (see notes) | East Townline Road | Walt Street | Welcome, Port Hope, Cobourg, Grafton, Colborne, Brighton, Smithfield | Part of old King's Highway 2. Also known as Toronto Road, Ridout Street, Walton Street, Mill Street and Peter Street, Port Hope; William Street and King Street, Cobourg; Toronto Street and King Street, Colborne; and Main Street and Elizabeth Street, Brighton. |
  | 8 | County Road 8 | County Road 30 | Wingfield Road | Campbellford, English Line, Hoards | |
  | 9 | Ganaraska Road | Cold Springs Camp Road | County Road 45 | Elizabethville, Garden Hill, Bewdley | continues as Durham Road 9 to Kirby |
  | 10 | County Road 10 | County Road 2 | Challice 1st Line | Welcome, Perrytown, Thomstown | continues as Peterborough County/Kawartha Lakes Road 10 to Pigeon Lake Road |
  | 15 | Harwood Road | County Road 45 | County Road 18 | Harwood | |
  | 18 | County Road 18 Burnham Street | County Road 2 | County Road 45 | Cobourg, Cold Springs, Gores Landing, Harwood, Alderville | |
  | 20 | Elgin Street Brook Road | County Road 18 | County Road 2 | Cobourg | |
  | 21 | County Road 21 | County Road 25 | County Road 30 | Tubbs Corners, Dundonald, Hilton | |
  | 22 | County Road 22 | County Road 45 | County Road 25 | Centreton, Castleton | |
  | 23 | County Road 23 Lyle Street | County Road 2 | County Road 22 | Centreton, Grafton | |
  | 24 | County Road 24 | County Road 45 | County Road 25 | Roseneath, Dartford | |
  | 25 | County Road 25 | County Road 2 | the Trent River | Colborne, Purdy Corners, Tubbs Corners, Castleton, Morganston, Warkworth, Hastings | |
  | 26 | County Road 26 | County Road 30 | County Road 41 | Spring Valley | |
  | 27 | County Road 27 | County Road 25 | County Road 30 | Morganston, Codrington | |
  | 28 | County Road 28 Ontario Street | County Road 2 | Hannah Road | Port Hope, Dale, Rosemount, Bewdley | continues as Peterborough County Road 28 to King's Highway 115 |
  | 29 | County Road 29 | Regional Road 45 | Percy Boom Road | Burnley, Warkworth | |
  | 30 | County Road 30 | County Road 2 | Browns Line Road | Brighton, Spring Valley, Hilton, Orland, Codrington, Meyersburg, Campbellford, West Corners, Trent River | |
  | 31 | Lakeport Road | Town Line Road | County Road 2 | Colborne, Lakeport | |
  | 33 | Merrill Road | County Road 45 | 7th Line | McCracken Landing | |
  | 35 | County Road 35 | County Road 25 | County Road 30 | Godolphin, West Corners | |
  | 38 | County Road 38 | County Road 8 | Rylstone Road | Campbellford, Pethericks Corners | |
  | 41 | New Wooler Road | County Road 30 | Dalmas Road | Orland | |
  | 45 | County Road 45 Division Street | County Road 2 | County Road 25 | Cobourg, Creighton Heights, Baltimore, Fenella, Alderville, Roseneath, Hastings | |
  | 50 | County Road 50 | County Road 30 | Trent River Road | Campbellford, Healey Falls | |
  | 64 | County Road 64 Prince Edward Street | County Road 2 | Stoney Point Road | Brighton, Gosport | continues as Hastings County Road 64 to Loyalist Parkway |
  | 65 | County Road 65 | County Road 2 | County Road 9 | Osaca, Elizabethville | |
  | 66 | Ontario Street | Presqu'ile Parkway | County Road 2 | Brighton, Presqu'ile Provincial Park | |
  | 70 | Jocelyn Street | County Road 2 | County Road 28 | Port Hope | |
  | 74 | Dale Road | County Road 10 | County Road 45 | Welcome, Dale, Precious Corners, Baltimore | Formerly King's Highway 106 |
  