My take on the numbers based on research (information that an expensive subscription gets me
).
Northbank has about 9.5 million SF of office space and is about 19% vacant (this is in about 45 buildings). Note that this does include every building along Riverside Ave from those wholly-owned by Fidelity to the Florida Times Union building and stuff in between, and it includes the CSX building. It even includes City Hall, YMCA annex, MOCA office space, Haydon Burns Library, etc. It does NOT include the City Hall Annex or the Public Library. It does include the old Barnett Bank building (139,000 SF), which of course is 100% vacant. Most of the vacancy is between Everbank Center, BOA Tower, Suntrust tower, 225 Water St, 233 W Duval, and the Old Barnet Bank building.
Southbank has about 2.4 million SF of office space and is about 14% vacant. I count ~10 buildings, with 1.6 million SF between the largest 3. This does NOT include Baptist Hospital or its medical office tower, but apparently the hospital employs just over 4,000, and it does not include School Board. This is an area reaching from the two Dupont office buildings over to just south of 95 where the MOB is.
11.9 million SF in urban core with a blended 18% vacancy rate, so about 9.76 million SF occupied, or at least leased/sub-leased. Here are your employment figures at different employment densities:
1:400 24,398
1:350 27,883
1:300 32,530
1:250 39,036
1:200 48,795
Add: est. employees in City Hall Annex, School Board, the Landing, RCBC and other restaurants, Main Library, off-site city/agency workers, hotels, parking garage operators, the Fed Reserve branch, and the ~4,000 at Baptist Medical Center. Call it 8,500 more employees.
So by my best guess using the 1:300 employment ratio above (factoring in that some space downtown may not be fully occupied but that other employers are "class B" employers with higher employment densities), and adding 8,500 employees as above, I estimate between 40,000-41,000 downtown employees. Of course while the bulk work day jobs and commute in for the 9-5, this also includes people who work evening shifts at hotels, restaurants, and the hospital.