Top 20 Oldest Doyenne of countries (as of 16th June 2025)
(documented or partially documented SCs)
Today's update (RIP Ms. Madrid)

1. United Kingdom - Ethel Caterham - 21 Aug 1909 - 115 World Doyenne since 30 Apr 2025
2. France - Marie-Rose Tessier - 21 May 1910 - 114 
3. United States - Naomi Whitehead - 26 Sept 1910 - 114 
4. Brazil - Izabel Rosa Pereira - 13 Oct 1910 - 114 
5. Italy - Lucia Laura Sangenito - 22 Oct 1910 - 114 
6. Russia - Klavdiya Gadyuchkina - 5 Dec 1910 - 114 
7. Japan - Miyoko Hiroyasu - 23 Jan 1911 - 114 
8. Costa Rica - Marita Camacho Quirós - 10 Mar 1911 - 114
9. Canada - Margaret Romans - 16 Mar 1912 - 113 
10. Argentina - Angélica Tiscornia - 22 Aug 1912 - 112 
11. Germany - Martha Henze - Dec 1912 - 112 
12. Portugal - Maria da Conceição de Brito - 31 Dec 1912 - 112 
13. Mexico - Eulalia Bravo Bravo - 12 Feb 1913 - 112 
14. Spain - Angelina Torres Vallbona - 18 Mar 1913 - 112 
15. Chile - Rosa Laura Torres Barra - 20 July 1913 - 111 
16. New Zealand - Aileen Kars - 12 Sept 1913 - 111 
17. Denmark - Kirsten Schwalbe - 10 Mar 1914 - 111
18. Puerto Rico - A. H. B. S. - 9 Apr 1914 - 111
19. Hungary - Árpádné Juhász - 14 May 1914 - 111
20. Australia - Lorna Henstridge - 6 June 1914 - 111
    20. Austria - Anna Wagner - 6 June 1914 - 111

Very interesting post Ale.

It appears only Australia on that list has a living male older than its doyenne.

Correct, but out of the countries that don't, Mexico probably has the best odds of joining Australia in regards to this. The odds of Mexico having a man as its OLP in the relatively near future are about 1/3.