Code	Country / Pays
OM	Oman	small flags
	(Organizations) International

Other Flags
Oakland City - US California	small flags
OAS (Organization of American States)	small flags
OAU (Organization of African Unity)	small flags
Oaxaca - Mexico	small flags
Obwalden - Switzerland	small flags
Odanak Nation - Canada-FN	small flags
Orléanais - France	small flags
Oglala Sioux - US Native	small flags
Ohio - USA	small flags
Oita - Japan	small flags
Okayama - Japan	small flags
Okinawa - Japan	small flags
Oklahoma -USA	small flags
Oliver - BC-Canada	small flags
Olympic	small flags
Olympic USA Flag	small flags
Ontario - Canada	small flags
OPEC (Organization of Oil Producing Countries)	small flags
Oppland - Norway	small flags
Orange County - US California	small flags
Oregon - USA	small flags
Örebro - Sweden	small flags
Orenburg - Russia	small Flags
Organisation Internationale de la Francophonie - Inter-Org	small flags
Orillia - ON-Canada	small flags
Osaka - Japan	small flags
Osgoode - ON-Canada	small flags
Oslo - Norway	small flags
Östergötland - Sweden	small flags
Østfold - Norway	small flags
Ostrobothnia - Finland	small flags
Ottawa-Carleton - ON-Canada	small flags
Ottawa - ON-Canada	small flags
Ottawa (new) - ON-Canada	small flags
Oulou - Finland	small flags
Overijssel - Netherlands	small flags