It's not so much age, but maturity and where the relationship is at. The couple should be able to comfortably talk about kids, and be ready to commit to "forever" with one another. That being said, I don't think that most people are ready to be married until at least 21... and should have been dating the other person for a couple of years. It's best to try living together before marriage too. Dating and living together are VERY different. You learn a lot about a person, and should know if you're compatible living together before you dedicate your life to them.
If you're at the right age now (marrying age,that is), pre-marriage counseling is the best option for you. It will give you straight-forward answers on marriage and building up a successful family. Hope this helps.
While practicality does not determine right from wrong, if the Bible's message on sex before marriage were obeyed, there would be far fewer sexually transmitted diseases, far fewer abortions, far fewer unwed mothers and unwanted pregnancies, and far fewer children growing up without both parents in their lives. Abstinence is God’s only policy when it comes to sex before marriage. Abstinence saves lives, protects babies, gives sexual relations the proper value, and, most importantly, honors God. 25 or older. wait at least a year before relations and no living together. 25= more educated, mature and less money issues. 1 year= takes out all the crap, gives you a chance to really get to know each other. If you aren't having relations, what are you doing? TALKING, learning, etc. Family, religion, kids, future, dreams, etc. Respect yourself, and the man will respect you. What do you want? What are deal breakers? If you love me you would have relations, guy is loser. If he says things, then doesn't do them, loser. If I say im going to call, I call. If I say i'm picking you up at 7, I pick you up AT 7. Not 9. I think you get the point.
The best advice on marriage comes from its originator, Jehovah God( Psalms 83:18). God created Adam and Eve to be man and wife forever( Genesis 2:23-25). Marriage is supposed to last for the rest of your lives( Matthew 19:6) . The age that you are honestly mentally, physically, and emotionally ready to begin this important relationship varies. The Bible gives outline for both a husband and wife and how to make their marriage a happy one that they would enjoy. It is best to marry when you know yourself first so that you know that kind of person will be a helper and complement to you and you life( Genesis 2:18). You will also need to serve as their complement also. You need to be old enough so that you are not using marriage to COMPLETE you but rather two WHOLE persons COMPLEMENTING each others wants and needs.