Depends on the private school. The earliest I've seen is 5 years old by 6/1 (e.g., John Thomas Dye) but most seem to be 7/1 (e.g., Brentwood, Curtis) and 9/1 (e.g., Buckley, Crossroads, Campbell).
The age for entering kindergarten in public schools varies state by state. I would think it would be the same for private and would probably vary from school to school. You would have to check with your state and with the school you are interested in.
cut off is different for different private schools: September 1 or October 1. For boys, read that they have to be born by June 1 to get in. for public schools it is December 2.
Any contributed content above is the subjective opinion of that member or external author, and not of
GreatSchools. GreatSchools does not check for accuracy in community posts or verify the contributor’s
identity. If you are searching for health-related advice we strongly suggest you seek professional medical
support. View our Community Guidelines for more details.