29 selected
- Pakistan
- Palau
- Palestine
- Palestine - Illegal Stamps
- Panama
- Panama Canal Zone
- Papua New Guinea
- Paraguay
- Penrhyn
- People's Democratic Republic of Yemen - PDR (South Yemen [1967-1990])
- Persia (Iran)
- Peru
- Philippines
- Philippines - Occupation by Japan
- Pitcairn
- Poland
- Poland [1915-1923] - Local postal areas
- Poland [1946] - Occupation of Italy
- Ponta Delgada
- Port Lagos
- Port-Said
- Portugal
- Portuguese Africa
- Portuguese Congo
- Portuguese Guinea
- Portuguese India
- Prince Edward Island
- Prussia
- Puerto Rico
- Not filled in