People in the countryside expect you to get married younger.
When you live in the country, your family and neighbours expect you to get married sooner than you would if you lived in the city.
この場合、次のように言うと自然で良いかと思います。
ーPeople in the countryside expect you to get married younger.
「田舎の人は若いうちに結婚することを期待する」
countryside で「田舎」
to expect で「期待する」
to get married で「結婚する」
ーWhen you live in the country, your family and neighbours expect you to get married sooner than you would if you lived in the city.
「田舎に住んでいると、家族や近所の人は、都会に住んでいる場合より早く結婚することを期待する」
country で「地方・田舎」
neighbours で「近所の人たち」
sooner than you would if you lived in the city で「もしあなたが都会に住んでいた場合より早く」
ご参考まで！
カナダ 
