Countries with which Delaware has tax treaties
| Country | Effective Date | Status |
| Australia | 01.12.1983 | In force |
| Austria | 01.02.1998 | In force |
| Bangladesh | 07.08.2006 | In force |
| Barbados | 28.02.1986 | In force |
| Belgium | 28.12.2007 | In force |
| Bulgaria | 15.12.2008 | In force |
| UK | 31.03.2003 | In force |
| Hungary | 12.09.1979 | In force |
| Venezuela | 30.12.1999 | In force |
| Vietnam | 07.07.2015 | Not in force |
| Germany | 01.01.1991 | In force |
| Greece | 01.01.1953 | In force |
| Denmark | 29.01.2001 | In force |
| Egypt | 31.12.1981 | In force |
| Israel | 01.01.1995 | In force |
| India | 01.01.1991 | In force |
| Indonesia | 30.01.1990 | In force |
| Ireland | 01.01.1998 | In force |
| Iceland | 15.12.2008 | In force |
| Spain | 21.11.1990 | In force |
| Italy | 16.12.2009 | In force |
| Kazakhstan | 01.01.1996 | In force |
| Canada | 16.08.1984 | In force |
| Cyprus | 31.12.1985 | In force |
| China | 22.10.1986 | In force |
| Latvia | 01.01.2000 | In force |
| Lithuania | 01.01.2000 | In force |
| Luxembourg | 20.12.2000 | In force |
| Malta | 23.11.2010 | In force |
| Morocco | 30.12.1981 | In force |
| Mexico | 01.01.1994 | In force |
| Netherlands | 01.01.1994 | In force |
| New Zealand | 02.11.1983 | In force |
| Norway | 29.11.1972 | In force |
| Pakistan | 21.05.1959 | In force |
| Poland | 01.01.1976 | In force |
| Portugal | 01.01.1996 | In force |
| Russia | 01.01.1994 | In force |
| Romania | 26.02.1976 | In force |
| Slovakia | 30.12.1993 | In force |
| Slovenia | 22.06.2001 | In force |
| Thailand | 15.12.1997 | In force |
| Trinidad and Tobago | 30.12.1970 | In force |
| Tunisia | 26.12.1990 | In force |
| Turkey | 19.12.1997 | In force |
| Ukraine | 05.06.2000 | In force |
| Philippines | 16.10.1982 | In force |
| Finland | 01.01.1991 | In force |
| France | 30.12.1995 | In force |
| Czech | 23.12.1993 | In force |
| Chile | 04.02.2010 | Not in force |
| Switzerland | 19.12.1997 | In force |
| Sweden | 26.10.1995 | In force |
| Sri Lanka | 12.07.2004 | In force |
| Estonia | 30.12.1999 | In force |
| South Africa | 28.12.1997 | In force |
| South Korea | 20.10.1979 | In force |
| Jamaica | 29.12.1981 | In force |
| Japan | 30.03.2004 | In force |