Religion in national symbols
Religion in national symbols can often be found in national anthems or flags. This has led to controversy in some countries in regard to the separation of church and state, when the national symbol is officially sanctioned by a government.
Flags which incorporate symbols of religion
Christianity
| Flag | Country | Religious characteristics |
 | Armenia | The color red emblematizes the maintenance of the Christian faith. |
 | Andorra | Includes a bishop's mitre, representing the Bishop of Urgell. |
 | Australia | Crosses of St. George, St. Andrew and St. Patrick |
 | Colombia | Blue represents the equality of all races and social classes before God and the law |
 | Denmark | Nordic Cross Flag |
 | Dominica | The cross represents the Trinity |
 | Dominican Republic | A Bible, the color white stands for salvation |
 | El Salvador | Dios, Unión, Libertad |
 | Fiji | Crosses of St. George, St. Andrew and St. Patrick, dove |
 | Finland | Nordic Cross Flag |
 | Georgia | Jerusalem cross |
 | Greece | The cross symbolizes Greek Orthodoxy |
 | Iceland | Nordic Cross Flag |
 | Ireland | The green symbolizes the Catholic population. The orange symbolizes the Protestants. |
 | Liechtenstein | Christian cross |
 | Malta | George Cross |
 | Moldova | Orthodox Cross |
 | Montenegro | The three crosses represents the Trinity |
 | New Zealand | Crosses of St. George, St. Andrew and St. Patrick |
 | Norway | Nordic Cross Flag |
 | Portugal | Compound cross of five quinas, each one charged with five saltire-arranged bezants, representing the five wounds of Christ |
 | San Marino | Cross |
 | Serbia | Orthodox Cross |
 | Slovakia | Patriarchal cross |
 | Spain | The three crosses represents the Trinity |
 | Sweden | Nordic Cross Flag |
 | Switzerland | Christian cross |
 | Tonga | Christian cross |
 | Tuvalu | Crosses of St. George, St. Andrew and St. Patrick |
 | Ukraine | The yellow represents golden domes of churches in the country. |
 | United Kingdom | Crosses of St. George, St. Andrew and St. Patrick |
 | Vatican City | The flag consists of two vertical bands, one of gold and one of white with the crossed keys of Saint Peter and the Papal Tiara centered in the white band |