I am looking for manga's where the female mc is older than the male but I want a married couple okay btw I have already read
1] Otoyomegatari
2] asa made jugoyu chu
3] soredemo wa sekai utkushi ( might be wrong spelling)

Oh and they must be married either during the start or during early chapters like 20 - 30 not during the ending.

( no yaoi/yuri etc no oneshots.)

Bonnouji Pretty sure they get married (can at least guarantee co-habitation) good short odd ball protagonists
not sure if shes older but i think she is
Zettai Heiwa Daisakusen Political marriage at first but actual feelings get involved later ages ... not sure
Reimei no Arcana Another political marriage this ones a bit longer and less light hearted but still good
Hapi Mari *looks about* yeaaa this has marriage no you probably dont wanna read it just giving some options here
Tokyo Crazy Paradise just to deviate further have this action-esque one eventual marriage (if i recall correctly)
thats it as far as sticking to your standards goes could reccomend more but ill deviate
really recommend the first one though the rest are sorta either or

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Risou no Himo Seikatsu (Novel) fits, if you don't mind novels

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stupid photobucket, wanting $400/yr just to display your images