Professors with Known or Estimated Ages:
* Albus Dumbledore: Around 150 years old at the time of his death (this includes his lifespan as a young wizard and his later years in the role of Headmaster).
* Minerva McGonagall: Born in 1935 (stated in the books), she would be in her 60s during Harry's time at Hogwarts.
* Severus Snape: Born in 1960 (stated in the books), he would be in his 30s at the start of the series and about 40 at the end.
* Rubeus Hagrid: Born in 1928 (stated in the books), he would be in his 60s during Harry's time at Hogwarts.
* Pomona Sprout: Likely to be in her 60s or 70s, given her position and seniority.
* Filius Flitwick: Likely to be in his 60s or 70s, given his position and seniority.
* Horace Slughorn: Born in 1898 (stated in the books), he would be in his 70s when he returned to Hogwarts.
Professors with Unclear Ages:
* Gilderoy Lockhart: His age isn't explicitly mentioned, but he is described as being "middle-aged" in the second book.
* Remus Lupin: He is described as being "around thirty" at the start of the third book.
* Sybill Trelawney: Her age is never explicitly stated, but she appears quite old.
* Charity Burbage: Her age isn't explicitly mentioned.
* Mad-Eye Moody: His age isn't explicitly mentioned.
Note: It is important to remember that the ages of fictional characters can vary depending on the interpretation of the reader.