As of January 2023, the World Customs Organization has a total of 185 members. The European Communities (now: European Union) joined "on an interim basis akin to those enjoyed by WCO Members".
Members list with date of membership
The 185 WCO members include 179 United Nations member states, one United Nations General Assembly non-member observer state (the State of Palestine), as well as Kosovo and 4 customs territories which are dependent territories. Those 185 members and the European Union are divided into the following regional groups:
East and Southern Africa
United Nations member states
— 1990-09-26
— 1978-08-25
— 1964-10-20
— 1993-07-01
— 2008-03-19
— 1995-08-08
— 1981-05-15
— 1973-08-06
— 1965-05-24
— 1978-08-02
— 1964-02-18
— 1966-06-06
— 1973-03-29
— 1987-07-01
— 1992-07-01
— 1964-03-03
— 2000-07-25
— 2012-10-04
— 2012-07-18
— 1964-03-24
— 1964-11-07
— 1964-11-03
— 1978-09-27
— 1981-03-19
Europe
United Nations member states (founders in bold) — 1992-08-31 — 1998-09-03 — 1992-06-30 — 1953-01-21 — 1992-06-17 — 1993-12-16 — 1952-12-11 — 2008-07-04 — 1973-08-01 — 1993-07-01 — 1967-08-31 — 1993-01-01 — 1951-10-19 — 1992-06-18 — 1961-01-27 — 1952-10-06 — 1993-10-26 — 1952-11-04 — 1951-12-10 — 1968-09-16 — 1971-02-15 — 1952-09-23 — 1958-05-23 — 1952-11-20 — 1992-06-30 — 2000-02-10 — 1992-06-22 — 1992-06-18 — 1953-01-23 — 1968-07-06 — 1994-10-28 — 2006-10-24 — 1953-01-23 — 1994-07-01 — 1951-08-06 — 1974-07-17 — 1953-01-26 — 1969-01-15 — 1991-07-08 — 2001-03-27 — 1993-01-01 — 1992-09-07 — 1952-07-13 — 1952-10-17 — 1952-12-19 — 1997-07-01 — 1951-06-06 — 1993-05-17 — 1992-06-26 — 1952-09-12 — 1992-07-28 non-UN member, partially recognised state — 2017-01-25 customs union