Religion in national symbols can often be found in national anthems or flags. This has led to controversy in some secular states 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
Dharmic religions BuddhismFlagCountryReligious significanceBhutan (flag)The orange half signifies Vajrayana Buddhist spiritual traditionMyanmar (flag)The color saffron stands for Theravada Buddhism.Singapore (flag)The white half symbolizes Chinese Buddhism.Sri Lanka (flag)The four Bodhi tree leaves symbolize four Buddhist metaphysicalThailand (flag)The color white stands for Theravada Buddhism.Buddhism and/or HinduismFlagCountryReligious significanceCambodia (flag)Angkor Wat, a Hindu-Buddhist temple complex.India (flag)The Ashoka Chakra symbolizes the Buddhist and the Indian-Hindu concept of Dharma.Flags of the world: an illustrated guide to contemporary flags Alfred Znamierowski – 2000, https://bharatmotherofdemocracy.ignca.gov.in/.Nepal (flag)Based on the Hindu traditional flags. Also represent Hinduism and Buddhism
Christianity
FlagCountryReligious significanceArmenia (flag)The red third emblematizes the maintenance of the Christian faith (particularly Oriental Orthodox and Oriental Catholic denominations).Andorra (flag)The coat of arms of Andorra contains a bishop's mitre, representing the Latin Catholic bishop of Urgell.Australia (flag)Crosses of Saint George, Saint Andrew and Saint Patrick symbolise Western Christianity (red may also symbolise the sacrifice of the blood of Jesus Christ, which was shed during his crucifixion)Burundi (flag)Saint Andrew's CrossCook Islands (flag)Crosses of Saint George, Saint Andrew and Saint Patrick symbolise Western Christianity (red may also symbolise the sacrifice of the blood of Jesus Christ, which was shed during his crucifixion)Denmark (flag)Nordic Cross FlagDominica (flag)The cross represents the TrinityDominican Republic (flag)Saint George's Cross, Gospel of John, the color white stands for salvationEl Salvador (flag) (God, Union, Liberty)Fiji (flag)Crosses of Saint George, Saint Andrew and Saint Patrick symbolise Western Christianity (red may also symbolise the sacrifice of the blood of Jesus Christ, which was shed during his crucifixion) and doveFinland (flag)Nordic Cross FlagGeorgia (flag)Saint George's Cross and four Bolnisi crosses symbolize Georgian Orthodoxy"The new flag of Georgia does not seem to be related with this historical banner. The flag of the National Movement was unknown ten years ago and was called 'the Georgian historical national flag' by the opposition leaders only after publications by the Georgian vexillologist I.L. Bichikashvili." Mikhail Revnivtsev, 25 November 2003 crwflags.comGreece (flag)Greek cross symbolizes Greek OrthodoxyHungary (flag)The red symbolizes the blood of Jesus Christ, and the white symbolizes the salvation, while the green symbolizes Catholic Christianity (particularly the Latin and Eastern Catholic churches).Iceland (flag)Nordic Cross FlagIreland (flag)The green signifies the Roman Catholic majority, and the orange signifies the Protestant minority, while the white signifies the peace between Catholics and Protestants.Liechtenstein (flag)Christian crossMalta (flag)George CrossMoldova (flag)Orthodox CrossMontenegro (flag)Three crosses on the coat of arms symbolize Montenegrin OrthodoxyMontserrat (flag)Crosses of Saint George, Saint Andrew and Saint Patrick symbolise Western Christianity (red may also symbolise the sacrifice of the blood of Jesus Christ, which was shed during his crucifixion). The flag also consists of an Irish figure Erin holding a Latin cross.New Zealand (flag)Crosses of Saint George, Saint Andrew and Saint Patrick symbolise Western Christianity (red may also symbolise the sacrifice of the blood of Jesus Christ, which was shed during his crucifixion)Niue (flag)Crosses of Saint George, Saint Andrew and Saint Patrick symbolise Western Christianity (red may also symbolise the sacrifice of the blood of Jesus Christ, which was shed during his crucifixion)Norway (flag)Nordic Cross FlagPortugal (flag)Compound cross of five quinas, each one charged with five saltire-arranged bezants, representing both the Five Holy Wounds and also Jesus Christ and the Four EvangelistsSan Marino (flag)Christian crossSerbia (flag)Serbian cross symbolizes Serbian OrthodoxySlovakia (flag)Patriarchal crossSpain (flag)Latin crossSweden (flag)Nordic Cross FlagSwitzerland (flag)Greek crossTonga (flag)Greek cross (red may also symbolise the sacrifice of the blood of Jesus Christ, which was shed during his crucifixion) Tuvalu (flag)Crosses of Saint George, Saint Andrew and Saint Patrick symbolise Western Christianity (red may also symbolise the sacrifice of the blood of Jesus Christ, which was shed during his crucifixion)United Kingdom (flag)Crosses of Saint George, Saint Andrew and Saint Patrick symbolise Western Christianity (red may also symbolise the sacrifice of the blood of Jesus Christ, which was shed during his crucifixion)Vatican City (flag)The flag consists of two vertical bands, one of gold (hoist side) and one of white with the crossed keys of Saint Peter and the Papal Tiara centered in the white band
Islam
FlagCountryReligious significanceAfghanistan (flag)ShahadaAlgeria (flag)Star and crescent, green half symbolizes IslamAzerbaijan (flag)Green stands for Islam, the crescent moon is also an Islamic symbolBahrain (flag)Five triangles represent the Five Pillars of IslamBrunei (flag)Crescent moonComoros (flag)Star and crescent and green color are traditional symbols of IslamIran (flag)The five parts of the emblem represent the Five Pillars of Islam, this shape of the emblem is a stylized form of the Arabic word "Allah" (ٱللَّٰهُ); text along the red and green bands reads "Allahu Akbar" ("God is Great")Iraq (flag)The phrase "Allahu Akbar" ("God is Great")Jordan (flag)The seven-pointed star represents the seven verses of the Quran's first suraLibya (flag)Star and crescent represent IslamMalaysia (flag)Crescent moonMaldives (flag)White crescent moon symbolizes IslamMauritania (flag)Star and crescent and green color symbolize IslamMorocco (flag)The green represents Islam. The pentagram's five points symbolize the five Pillars of Islam.Niger (flag)The green symbolizes Islam.Pakistan (flag)Star and crescent symbolize Islam and the dark green field symbolizes the Muslim majority of Pakistan.Saudi Arabia (flag)Shahada (Muslim creed) on green background, a color represents IslamSenegal (flag)The green stripe and star represent Islam.Somaliland (flag)Shahada (green may also represent Islam)Sudan (flag)Green represents Islam.Tunisia (flag)Star and crescent symbolize IslamTurkey (flag)Star and crescentTurkmenistan (flag)Crescent moon (green may also represent Islam)Uzbekistan (flag)Crescent moon (green may also represent Islam), the word "Allah" ("God") from 12 starsYemen (flag)The red symbolizes the Hashemites, and the white symbolizes the Umayyads, while the black symbolizes the Abbasids
Judaism FlagCountryReligious significanceIsrael (flag)The flag's basic design is based on a Jewish prayer shawl, the Star of David is a symbol of Judaism
Traditional FlagCountryReligious significanceArgentina (flag)Sun of May's features are that of the Incan god IntiJapan (flag)Red circle represents the sun goddess AmaterasuSouth Korea (flag)Taegeuk symbol is associated with Taoism and traditional Korean Shamanism; I Ching trigrams.Mexico (flag)Coat of arms of Mexico is symbolic of the Aztec legend of Tenochtitlan, modern-day Mexico CityMongolia (flag)Yin and Yang symbol is associated with Taoism and traditional Mongolian shamanism. The Sun, Moon and blue colour represent the eternal blue skyTaiwan (flag)The twelve rays of the white sun symbolize the twelve months and the twelve traditional shichen (; shíchén), periods of one-twelfth of a day used in Traditional Chinese timekeeping and astrologyTajikistan (flag)The seven stars representing number seven in Tajik traditional legends, representing perfection and happiness while alluding to a traditional belief that the heavens feature seven mountains and seven orchard gardens with a star shining above each mountain.Uruguay (flag)Sun of May's features are that of the Incan god Inti
National anthems which incorporate religion