[16] On 8 March 2021, the Miss World Organization confirmed that the competition will take place at the Coca-Cola Music Hall in San Juan, Puerto Rico on 16 December 2021.

[23][24] Miss World Organization chairwoman Julia Morley confirmed that the delegates are currently isolated and in quarantine and that they will not be on stage for the final show if they do not produce a negative PCR test.

[25][26] On 15 December, Puerto Rico Department of Health confirmed that 17 positive cases for COVID-19 related to the Miss World pageant activities, includes contestants and technical personnel.

[30][31][32] She was required to be isolated for 10 days and will not be permitted on the stage during the finals as part of Puerto Rico Department of Health and Miss World guidelines.

[34] On 16 December, epidemiologist Melissa Marzán confirmed that 15 staff and 23 contestants were positive cases associated with Miss World during the Puerto Rico Department of Health press conference.

[54] The 2021 edition saw the debuts of Iraq and Somalia,[55][56] and the returns of Belize, Cameroon, Côte d'Ivoire, Estonia, Guinea, Madagascar, Namibia, Norway, Saint Lucia, Serbia, Sint Maarten, and Uruguay.

[58] Michelle Calderon of Guatemala, Nazerke Karmanova of Kazakhstan, and Adesha Penn of the US Virgin Islands withdrew due to undisclosed reasons.

[59][60][61] On 15 December, the government of Sint Maarten officially denounced the participation of Lara Mateo at Miss World 2021 as Dutch territory representative.

[64][62] Prime Minister Silveria Jacobs said the government discovered that Lara Mateo was wrong registered by Guadeloupe's franchise holder to represent Sint Maarten.

[65] On 28 February 2022, Stephanie Del Valle took to Instagram to announce she would no longer be hosting the pageant's 70th edition, claiming "It is contrary to my ethics and moral principles to continue working with an organization that has acted in a defamatory, frivolous and unfair manner; solely for the purpose of causing harm.

[69] § – Digital Media Challenge winner The contestants were officially assigned to their grouping via Miss World YouTube Channel on 24 November 2021.

[117][125] The Sports Challenge was initially held on 1 December 2021, but Miss Norway, Amine Storrød, had an asthma attack during the event which led to the delay the rest of the competition.

[137][138] § Beauty With a Purpose Ambassador Award winner Fifteen contestants earned their spot in the semi-finals via various challenges and the remaining twenty-five semi-finalists were officially announced via Miss World Facebook page on 21 January 2022.

Shree Saini of United States was awarded as Beauty With A Purpose Ambassador and she will accompany the new Miss World, Karolina Bielawska of Poland during her reign.