Ghana – 24.1
North Korea – 24.8
Germany – 25.0
Cameroon – 25.2
Spain – 25.9
Chile – 25.9
Serbia – 26.0
Slovakia – 26.1
Switzerland – 26.7
Ivory Coast – 26.7
Uruguay – 26.7
Slovenia – 26.7
South Africa – 26.9
USA – 26.9
Mexico – 27.1
Argentina – 27.1
South Korea – 27.1
Algeria – 27.2
New Zealand – 27.3
France – 27.4
Greece – 27.7
Nigeria – 27.7
Denmark – 27.7
Netherlands – 27.7
Portugal – 27.7
Japan – 27.8
Honduras – 28.1
Paraguay – 28.1
Italy – 28.2
Australia – 28.4
Brazil – 28.6
England – 28.7
So England and Brazil are the oldest, which is a little surprising. I thought Italy would beat them.
It's also worth noting that Italy had the oldest squad at the last WC.
North Korea – 24.8
Germany – 25.0
Cameroon – 25.2
Spain – 25.9
Chile – 25.9
Serbia – 26.0
Slovakia – 26.1
Switzerland – 26.7
Ivory Coast – 26.7
Uruguay – 26.7
Slovenia – 26.7
South Africa – 26.9
USA – 26.9
Mexico – 27.1
Argentina – 27.1
South Korea – 27.1
Algeria – 27.2
New Zealand – 27.3
France – 27.4
Greece – 27.7
Nigeria – 27.7
Denmark – 27.7
Netherlands – 27.7
Portugal – 27.7
Japan – 27.8
Honduras – 28.1
Paraguay – 28.1
Italy – 28.2
Australia – 28.4
Brazil – 28.6
England – 28.7
So England and Brazil are the oldest, which is a little surprising. I thought Italy would beat them.
It's also worth noting that Italy had the oldest squad at the last WC.