Thanks for asking a question on www.thisisyourbible.com
That is a very difficult question to answer. What do you mean by "Older"? For example, my wife's grandfather remarried after having been a widower for many years, at the age of 92 and relocated from Canada to Australia!
It is certainly possible for the elderly to marry. Whether or not it is a wise decision to do so depends on individual circumstance.
Here are links to information which will be of use to you:
Marriage in the Lord 1: www.thisisyourbible.com/library/show/241
Marriage in the Lord 2: www.thisisyourbible.com/library/show/735
I hope you have found this helpful.