| Years Bordering | Country | Borders With |
| 1861-1979 | |
| 1861-1947 | |
| 1861-1926 | |
| 1861-1918, 1921-1923 | |
| 1861-1912 | |
| 1861-1910 | |
| 1861-1905 | |
| 1861-1873 | |
| 1861-1873 | |
| 1861-1868 | |
| 1861-1867 | |
| 1861-1867 | |
| 1861-1866 | |
| 1866-1871 | |
| 1867-1918 | |
| 1871-1916 | |
| 1905-1917 | |
| 1910-1945 | |
| 1911-1924 | |
| 1912-1949 | |
| 1916-1918 | |
| 1917- | |
| 1917-1919 | |
| 1918-1940, 1990- | |
| 1918-1940, 1990- | |
| 1918-1940, 1990- | |
| 1918-1939 | |
| 1918-1921 | |
| 1918-1920 | |
| | Years Bordering | Country | Borders With |
| 1918-1919 | |
| 1918 | |
| 1920-1939, 1946 | |
| 1921-1944 | |
| 1923-1991 | |
| 1924-1992 | |
| 1926-1973 | |
| 1932-1945 | |
| 1940-1944 | |
| 1905-1917, 1944- | |
| 1944-1989 | |
| 1945- | |
| 1945-1991 | |
| 1946-1949, 1989-1991 | |
| 1947-1965 | |
| 1949- | |
| 1949-1989 | |
| 1965-1989 | |
| 1973-1978 | |
| 1978-1991 | |
| 1979-1991 | |
| 1989- | |
| 1989-1991 | |
| 1991- | |
| 1991- | |
| 1991- | |
| 1991- | |
| 1991- | |
| 1992- | |
| 1903-1920 | |
| 1903-1920 | |
| 1903-1920 | |
|