100% in my area.
My county is actually very OLD (near Richmond, VA). Areas still getting developed have new schools, driving better teachers to them, higher donations to PTAs, more family involvement with students, better-ranked schools... The areas with 100+-year-old schools have lower-income families, teachers try to transfer out when they get offers, PTAs don't have as much money, and parents are less involved... The county doesn't have the funds to demo 100-year-old schools to build new ones so the district you live in determines the quality of the education for your kids. There aren't a ton of private schools and the cost of them is similar to a public university. Thus, the overall ranking for the county schools isn't great but you have some top % schools and some bottom % all in the same county.