Timeline for late tenure track positions
After the last interview, the committee will have to come up with a ranked list of candidates. Then this is forwarded to the department head for approval. Then this goes to the dean for approval. Then an offer letter will have to be drawn up. This has to be approved by the Office of Equal Opportunity. This process can easily take 2 or more weeks, and this is particularly true at places where final exams are running at the same time.
In other words, have patience!