“2.5+ mil. 2010 population count + 1/4 mil. commuters + 2.8% undercount.”
The 2010 data aren’t out yet, but here is what the Census Bureau found in 2000:
Total resident population 2,465,326.
Total workers working in the area 667,477.
Total workers living in the area 901,027, of whom 431,559 worked in Brooklyn.
Daytime population 2,231,776.
“how many years did all jewish men and woman boys and girls never carried on shabbos”
Warsaw had an eruv until 1939; Jews carried in what was then the largest Jewish city in the world.