Oman:
1650 (expulsion of the Portuguese)
Pakistan:
14 August 1947 (from UK)
Palau:
1 October 1994 (from the US-administered UN Trusteeship)
Panama:
3 November 1903 (from Colombia; became independent from
Spain 28 November 1821)
Papua New Guinea:
16 September 1975 (from the
Australian-administered UN trusteeship)
Paraguay:
14 May 1811 (from Spain)
Peru:
28 July 1821 (from Spain)
Philippines:
4 July 1946 (from US)
Pitcairn Islands:
none (overseas territory of the UK)
Poland:
11 November 1918 (independent republic proclaimed)