The Republic of Ireland have slipped five places to 51st in the FIFA world rankings.
England are unchanged in sixth in the latest list, with Northern Ireland overtaking the Republic by climbing two places to 47th.
Wales fell two places to 77th, while Argentina took over at the top of the rankings from world champions Italy, who fell to second, with Brazil third, France fourth and Germany fifth.
Scotland, meanwhile, have climbed to their highest ever position of 16th in the FIFA world rankings.
They have not played a senior international since October but continue to climb as other countries lose points accrued over previous seasons.
Their rise comes about due to the complicated FIFA points system, with Scotland having nudged ahead of Switzerland, Cameroon, Mexico and Denmark.
Points gained over the course of a year are included in full, however results from any preceding 12 months count only for 50%, with that figure decreasing to 30% for a third year and then 20% for a fourth year.
Former national team boss Walter Smith instigated Scotland's rapid climb, with the team having been positioned 88th two years ago and 62nd a year ago.
FIFA introduced world rankings in 1993 and Scotland matched their previous highest ranking of 20th place last month.
