"位于西北的" can be translated into English as "located in the northwest (of...)" or "situated in the northwest (of...)", with the specific area or region to be filled in the parentheses if contextually necessary. For example:
The city is located in the northwest of the country. （这座城市位于该国的西北部。）
The village is situated in the northwest region. （这个村庄位于西北地区。）