Afghanistan is on the UN list of least developed countries and heads its list of landlocked developing countries

Background

UN-OHRLLS, the Office of the High Representative for the Least Developed Countries, Landlocked Developing Countries and Small Island Developing States, publishes both of the lists on which Afghanistan appears.
The List of LDCs opens Afghanistan Angola Bangladesh and runs on through the alphabet.
On the List of LLDCs, Afghanistan is entry 1. Afghanistan and the numbering runs to 32. Zimbabwe. An asterisk stands against its name, and the page's legend reads Also Least Developed Country, so Afghanistan is counted in both groups at once.
The World Trade Organization recognizes as least-developed countries those countries which have been designated as such by the United Nations. Its page records that there are currently 44 least-developed countries on the UN list, 37 of which to date have become WTO members, and its own enumeration begins These are: Afghanistan Angola Bangladesh. Afghanistan is itself a WTO member, so it sits inside that group of LDC members.