It depends on the preference of the couple. Some women prefer to be referred to by their husbands' names... others detest it. For a generic letter where you don't know the couple, choose the option without the husband's name. There are other issues as well. Do you know that the husband goes by Jim? If you are uncertain of a nickname, use the formal first name. If you know the couple, and the wife's name, it is perfectly acceptable to address a letter to Sally and Jim Smith. That would avoid the issue of calling her by the husband's name.
You can address it to Mr and Mrs. Smith. You could address it is as the Smith Family. Or you could address it as Mr. Smith and Family.
In the address section of the envelope and in the heading at the top of the letter, address it to "Councilman Joe Smith", but in the salutation you should write it as "Dear Mr. Smith". This applies to retired councilmen as well as those that are still in office.
"Bill Smith and Betty Jones"
If you are addressing a married couple who are both doctors you can address them two ways. You can address them by either stating Drs. Jack and Jill Smith or Dr. Jack Smith and Dr. Jill Smith.
For Frederick W Smith's postal letter address, see the Related Link (to the Left, or below).
If you were sending a letter to John Smith, MD - you could address the letter to Dr. Smith.
In correspondence, addressing a married couple is : " Mr and Mrs John Smith " - the first name of the husband is the only one used. It is incorrect to address a letter to a married woman as " Mrs. Mary Smith. " A married woman traditionally takes the name of her husband and so a letter to her would properly read, " Mrs. John Smith." Surreyfan
Messrs. Smith and Jones Messrs. Smith Messieurs Smith and Jones Messieurs Smith
You would address the letter to John Smith III. This is the proper way to denote that he is the third person in his family line with the name John Smith.
When addressing a letter to a married couple where the husband is a Jr., you would write: Mr. John Doe Jr. and Mrs. Jane Doe. The Jr. suffix is included after the husband's name to indicate that he is the son with the same name as his father. It is important to use both spouses' names in the salutation to ensure both individuals are properly acknowledged.
Messrs. Smith and Jones Messrs. Smith or Messieurs Smith and Jones Messieurs Smith
I would say The Reverands John and Mary Smith.