Taiwan has rejected same-sex marriages, in a blow to the island’s reputation as a rights trailblazer in Asia.
The results in referendums come despite a high court ruling in March 2017 in favour of such unions.
The court also gave parliament two years to amend laws or pass new ones. It is unclear how Saturday’s voting will affect legislation.
Meanwhile, President Tsai Ing-wen quit as leader of Taiwan’s governing party after defeats in local elections.
Her pro-independence Democratic Progressive Party (DPP) lost more than half of the 13 cities and counties it won in 2014.
Taiwan’s relations with China have deteriorated since Ms. Tsai came to power in 2016.
Beijing has refused to deal with her because she does not recognise an agreement reached between the two sides in 1992 that both sides are part of one China.
The marriage issue was actually the subject of three separate referendums on Saturday, which were put forward by rival camps.
Conservative groups asked whether the legislation – defining marriage as a union between a man and a woman in Taiwan’s Civil Code – should remain unchanged, while LGBT activists asked for the marriage law to be amended to include same-sex couples.
Results show voters backed the conservative “pro-family” groups.
The government earlier said Saturday’s referendums would not affect it bringing in the changes required by the court ruling. The authorities are now expected to pass a special law, without amending the Civil Code.
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But campaigners fear the eventual legislation will be weaker.
One possible outcome could be that gay couples are given legal protection – but not allowed to get married, correspondents say.
At a news conference, President TSA Ing-wen admitted that the DPP had suffered a series of defeats in key local elections.
