My secretary's husband is a mason. He belongs to the historically African-American lodge in DC. She says the average age for that lodge is somewhere in the upper- 60's.
The age problem is real accute all over. There simply will not be enough young people coming in to take their place.
Lodges have been combining memberships and consolidating into fewer and fewer lodges.
Even in places like DC, where the population is huge, the problem persists.