In the Jewish religion
Religious Jewish groups encourage early marriage. Marriage begins at puberty, i.e. the young man is married from the age of thirteen, and the girl from the twelfth, and they may be married before that age if they show signs of physical maturity and puberty. As for the one who reached the age of twenty and did not marry, he deserved the curse.
However, in 2013 the Israeli parliament approved raising the age of marriage to eighteen, and the decision was met with strong opposition from hard-line religious groups.
Judaism knew the system of polygamy, so that there was no limit to the number of wives, but it was open.
Divorce is permitted in the Jewish religion, and the decision is in the hands of the husband. The wife may resort to the court to pressure her husband to divorce her if the husband refuses the order.
In the Christian religion
Catholic canon law adopted Roman law, which set the minimum age for marriage at 12 years for females and 14 years for males. In 1917 the Roman Catholic Church raised the minimum age of marriage to 14 for females and 16 for males.
Christianity was in the beginning a system of polygamy. But when it combined monasticism and marriage, it allowed a man to marry only one woman, lest he fall into adultery.
Divorce is not permissible except in two cases: (adultery, and if one of the spouses is not Christian).
Hindu law which includes Hindus, Jains, Sikhs and Buddhists has set the legal age for marriage - 21 years for men and 18 years for women in India.
In the Islamic religion
According to the Sunni sect
The guardian of the young girl takes her place if he sees the interest in marrying her to a righteous man. But a man should not consummate his young wife unless she is such that she is able to have intercourse, and this varies according to different environments. Some Sunni jurists considered the ability of a girl to tolerate sexual intercourse as the criterion, not a specific age.
A judge can authorize the marriage of a minor if he or she has completed 15 years of age, in the event of the approval of his guardian.
According to the Shiite sect
The criterion is proof of legal puberty. The male is expected to reach puberty at 15 years of age, and the female at 13 years of age.
According to the Druze sect:
Puberty is 16 years for males and 15 years for females.
Islam allows polygamy, provided that it does not exceed 4 wives.
Divorce is permissible and its decision is in the hands of the husband. The wife may resort to the court to divorce her if the husband refuses.
According to medicine
The best age for a girl to marry is 28 to 32 years because fertility is at the top and declines after the age of 35 or 36

God said in the Quran:
“If you fear that you cannot act justly towards the orphans, then marry such women as seem good to you; two, three, four of them. But if you fear that you cannot do justice, then one only.”
“Give women their dowries freely, but if they are pleased to offer you any of it, consume it good and smooth.”
“Let those who do not find the means to marry be abstinent until God enriches them of His bounty.”

Please add related verses from the Bible.

Marriage within religion is good..

In the Bible:
1 Peter 4:8 ~ Above all, keep loving one another earnestly, since love covers a multitude of sins.
Colossians 3:14 ~ And above all these put on love, which binds everything together in perfect harmony.
In the Quran:
“And of His signs is that He created you from dust and you became humans scattered throughout the earth. And of His signs is that He created for you wives from among yourselves, that you might reside with them, and has put kindness and mercy between you. Surely, there are signs in this for those who think.”

The age thing in Catholicism is really ridiculous.
I guess that's handy in 3rd world countries where the Vatican has converted many people.

Over here, however, it is not allowed to marry at the age. Both have to be at least 18 yrs old.
And you can NOT marry in church until you're legally wed --> civil marriage is the only legally binding marriage here.
It's the same in Belgium.

If a priest was to marry a couple before they are legally wed he can get in trouble. This can vary from a fine and even imprisonment.
So no priest in his right mind will go there. It's against the law.

So on the wedding day itself -and provided people want a church marriage- they first go to town hall to get legally wed.
Then the entire wedding party moves to church for the church blessing & wedding.
For many it isn't because they're oh-so religious and church-going, but just for the 'dress up' and nice photos, a bit of old-fashioned ritual.
But many don't even go for a church wedding anymore.
And you have to pay for it, and if memory serves it isn't cheap.

When I got married we didn't have a church wedding either. We never went to church so we both felt it was hypocritical and neither felt the need for it.

If I'd ever get married again I'd want a hand-fasting. That does mean a lot to me. But again, that isn't legal here so if we want it to be we first would have to get legally wed (civil marriage).

But practically sexual experience among Dutch and US teenagers 15–19 years of age in the Netherlands are: US females 53% Dutch 58%

https://www.researchgate.net/figure/Sexual-experience-among-Dutch-and-US-teenagers-15-19-years-of-age-Note-US-data-from_fig1_248965620

Approximately one-half of teenagers 15–19 years of age in The Netherlands and in the United States have had sexual intercourse.