--- title: "When did a country last join the United Nations?" description: "South Sudan, the 193rd member, 14 July 2011. What happened, why it has not happened since, and whether it plausibly could again." url: https://atoneplace.net/the-last-time/un-member/ site: "At One Place" --- # When did a country last join the United Nations? **When did a country last join the United Nations?: 14 July 2011** South Sudan, the 193rd member South Sudan became independent from Sudan on 9 July 2011 after a referendum in which almost 99 per cent voted to separate, and joined the UN five days later. It is the newest widely recognised sovereign state. Membership has stood at 193 since, which is the longest the number has been static since the 1940s. - **What:** South Sudan, the 193rd member - **When:** 14 July 2011 - **Category:** Countries and borders - **Could this change?:** Yes. This streak could end, and if it does this page becomes a historical note rather than an answer. ## Countries and borders | Question | When | | --- | --- | | When was the US Constitution last amended? | 7 May 1992 | | When did Britain last change its currency system? | 15 February 1971 | | When did the US flag last change? | 4 July 1960 | | When was a US state last admitted? | 21 August 1959 | | When did a European country last change calendar? | 1923 | | When did the size of the US Supreme Court last change? | 1869 | | When did the Union Jack last change? | 1 January 1801 | > This page gives a date and never a "years ago". These pages are built as static files, so a computed interval would freeze at build time and quietly become wrong — which on a reference site is worse than making the reader do the subtraction. ## Common questions ### When did a country last join the United Nations? 14 July 2011 — South Sudan, the 193rd member. ### What happened? South Sudan became independent from Sudan on 9 July 2011 after a referendum in which almost 99 per cent voted to separate, and joined the UN five days later. It is the newest widely recognised sovereign state. Membership has stood at 193 since, which is the longest the number has been static since the 1940s. ### Could it happen again? Yes. This is one of the entries where the streak could plausibly end, which is stated on the page rather than left implied. ## Related pages - [When was the US Constitution last amended?](https://atoneplace.net/the-last-time/constitutional-amendment/) - [When did Britain last change its currency system?](https://atoneplace.net/the-last-time/decimal-currency-uk/) - [When did the US flag last change?](https://atoneplace.net/the-last-time/us-flag-change/) - [When was a US state last admitted?](https://atoneplace.net/the-last-time/us-state/) - [When did a European country last change calendar?](https://atoneplace.net/the-last-time/calendar-change/) - [When did the size of the US Supreme Court last change?](https://atoneplace.net/the-last-time/us-supreme-court-size/) - [When was the last Boeing 747 delivered?](https://atoneplace.net/the-last-time/boeing-747/) - [When did Microsoft Office last change its default font?](https://atoneplace.net/the-last-time/office-default-font/) - [When did the London Underground last gain a line?](https://atoneplace.net/the-last-time/london-underground-line/) - [When were the SI base units last redefined?](https://atoneplace.net/the-last-time/si-base-units/) - [When was the last leap second added?](https://atoneplace.net/the-last-time/leap-second/) - [When was an element last added to the periodic table?](https://atoneplace.net/the-last-time/new-element/) - [Everything, most recent first](https://atoneplace.net/the-last-time/) ## Sources - Wikidata — Wikimedia Foundation (https://www.wikidata.org/) [CC0 1.0]