|Religion||Members||% of total population||Temples & churches|
|Buddhism (佛教) (including Tantric Buddhism)||8,086,000||35.1%||4,006|
|I-Kuan Tao (一貫道)||810,000||3.5%||3,260|
|Roman Catholic (天主教)||298,000||1.3%||1,151|
|Lord of Universe Church (天帝教)||298,000||1.3%||50|
|Maitreya Great Tao (彌勒大道)||250,000||1.1%||2,200|
|Tian De Jiao (天德教)||200,000||0.9%||14|
|Syuan Yuan Jiao (軒轅教)||152,700||0.7%||22|
|Universe Maitreya Emperor Jiao (宇宙彌勒皇教)||35,000||0.2%||12|
|Hai Zih Dao (亥子道)||30,000||0.1%||55|
|Church of Scientology (山達基教會)||20,000||< 0.1%||7|
|Bahá'í Faith (巴哈伊教)||16,000||< 0.1%||13|
|Jehovah's Witnesses (耶和華見證人)||6,223||< 0.1%||85|
|The Chinese Heritage and Mission Religion (玄門真宗)||5,000||< 0.1%||5|
|Zhonghua Sheng Jiao (中華聖教)||3,200||< 0.1%||7|
|Mahikarikyo (真光教團)||1,000||< 0.1%||9|
|Pre-cosmic Salvationism (先天救教)||1,000||< 0.1%||6|
|Huang Zhong (黃中)||1,000||< 0.1%||1|
|Da Yi Jiao (大易教)||1,000||< 0.1%||1|
|Total religious population||18,724,823||81.3%||33,223|
Statistics for the following religions and new religious movements are missing from the table above:
巴哈伊教, The Bahá'í Faith in Taiwan began after the religion entered areas of China and nearby Japan. The first Bahá'ís arrived in Taiwan in 1949 and the first of these to have become a Bahá'í was Mr. Jerome Chu (Chu Yao-lung) in 1945 while visiting the United States. By May 1955 there were eighteen Bahá'ís in six localities across Taiwan. The first Local Spiritual Assembly in Taiwan was elected in Tainan in 1956. The National Spiritual Assembly was first elected in 1967 when there were local assemblies in Taipei, Tainan, Hualien, and Pingtung. Circa 2006 the Bahá'ís showed up in the national census with 16,000 members and 13 assemblies.
Though many Taiwanese visit temples regularly, religion for the Taiwanese at large should not be considered a precisely "spiritual" activity. Most temples have built reputations on claims of being able to provide good fortune and do not emphasize a particular morality. In fact there are "good gods" and "bad gods" under the same temple. The main purpose of visiting the temples is to pray for fortune. This has been considered to be the cause of a "moral vacuum" in Taiwan. One of the most popular sects, Ma Tzu, could be considered to be entirely materialistic in nature.
Besides large temples, small outdoor shrines to local deities are very common, and can be spotted on roadsides, parks, and neighborhoods in Taiwanese cities and towns. These small pockets of religious atmosphere let people stop by and pray informally anytime. Many homes and businesses may also set up small shrines of candles, figurines, and offerings. Some restaurants, for example, may set up a small shrine to the Kitchen god for success in a restaurant business. Students may visit a shrine to the Learning god for good luck before a test.
Taoist temples are highly decorative. Colorfully tiled sculptures of dragons and other mythological creatures highlight the roof, and temples are often filled with statues of many gods and semi-theistic historical figures, reflecting the polytheistic and ancestor worship tradition of Taoism and folk religion.
Festivities and picnics often take place at Taoist temples.
There are approximately 4.55 million or 4.5 million Taoists in Taiwan and 4.9 million Buddhists .
Following retrocession, Taiwan was inundated with Mainland monks, including some who were considered to be of the best and brightest of the previous decades, such as Master Yinshun (Yìnshùn 印順). Tainted by the whiff of collaboration, outshone by these refugees, and underrepresented in the Chinese Buddhist Association (CBA) which served as a liaison with the government, the local lineages declined.
The CBA remained the dominant Buddhist organization until the end of martial law, when its government mandated monopoly was ended. Since the eighties, Buddhism has enjoyed a surge of popularity as the percentage of people identifying themselves as Buddhist rose from the low teens to almost fifty percent. Today there are several large Buddhist organization based in Taiwan that have expanded to become international organization. They include Dharma Drum Mountain (Făgŭshān 法鼓山) founded by Master Sheng Yen (聖嚴), Buddha's Light International (Fógŭangshān 佛光山) founded by Master Hsing Yun (星雲), and the Tzu Chi Foundation (Cíjì jījīnhùi 慈濟基金會) founded by Master Cheng Yen (證嚴法師).
Tzu Chi, one of the largest international non-profit Buddhist organizations, focuses on community service, outreach programs, charity work, and international humanitarian efforts. They have opened hospitals, community centers, schools, and Tzu Chi University in Hualien County.
Islam originated in Saudi Arabia and spread eastward to China as early as the 7th century AD. Muslim merchants married local Chinese women, creating a new Chinese ethnic group called the Hui people. Islam first reached Taiwan in the 17th century when Muslim families from the southern Chinese coastal province of Fujian accompanied Koxinga on his invasion to oust the Dutch from Taiwan. Islam did not spread and their descendants became assimilated into the local Taiwanese society adopting the local customs and religions.
During the Chinese Civil War, some 20,000 Muslims, mostly soldiers and civil servants, fled mainland China with the Kuomintang to Taiwan. Since the 1980s, thousands of Muslims from Myanmar and Thailand, who are descendants of Nationalist soldiers who fled Yunnan as a result of the communist takeover, have migrated to Taiwan in search of a better life. In more recent years, there has been a rise in Indonesian workers to Taiwan. There are an estimated 80,000 Indonesian Muslims living in Taiwan, in addition to the existing 53,000 Taiwanese Muslims. All demographics combined, there are over 140,000 Muslims in Taiwan.