- Marginal Line: 320 km line of
fortification on the Russia-Finland border
- Line of Actual Control: India
& China on the Northern Border
- Line of Control: India and
Pakistan
- Durand Line: Afghanistan and
Pakistan
- Radcliffe Line: India and
Pakistan (Its includes Bangladesh Line)
- Blue Line: Israel &
Lebanon
- Purple Line: Israel and Syria
- Green Line: Israel and its Neighbours
(Egypt, Jordan, Lebanon and Syria)
- Mason-Dixon line: Maryland
and Pennsylvania/Delaware in Colonial America
- Curzon Line: Poland &
Russia
- Military Demarcation Line (MDL) or
Armistice Line: North Korea and South Korea
- McMohan Line: India &
China
- Maginot Line: France &
Germany
- Mannar Haime line: Russia
& Finland
- Order Neisse Line: Germany
& Poland (aftermath of World war II)
- Hindenburg Line: Poland &
Germany (at the time of First World war)
- Sigfried Line East: France
& Germany (at the time of second world war)
- 16 Parallel North: Angola and
Namibia
- 17th Parallel Line: North
& South Vietnam
- 20 Parallel North: Libya
& Sudan
- 22 Parallel North: Egypt
& Sudan
- 25 Parallel North: Mauritania
& Mali
- 26 Parallel North: Western
Sahara & Mauritania
- 31 Parallel North: Iraq &
Iran
- 35 Parallel North: US it
serves as border b/w Tennessee/Mississippi, Tennnessee/Alabama, Tennesse/Georgia,
North Carolina/Georgia
- 36 Parallel North: In the US
it forms forms the southernmost boundary of the state of Missouri with the
state of Arkansas
- 38 Parallel North Line: North
& South Korea
- 40 Parallel North: US it
serves as border b/w Nebraska & Kansas
- 41 Parallel North: US it
forms the border b/w Wyoming/Utah border, Wyoming/Colorado, Nebraska/Colorado.
- 42 Parallel North: US it
serves as border of new York & Pennsylvania Border
- 43 Parallel North: US it
serves as border of b/w State Nebraska & State of south Dakota
- 45 Parallel North: US it
forms the boundary b/w Montana & Wyoming
- 49 Parallel North (Medicine Line):
USA & Canada
