Here is the latest installment of a side by side comparison of campaign offices. By the way, I got these by looking around barackobama.com and mittromney.com.
Here is the side by side comparison of campaign offices in all states, according to the latest totals posted on the candidates' respective websites. In parenthesis, you will see how many each candidate has added or subtracted since the last update.
You will notice that the Obama campaign has a whole bunch of offices in non-battleground states, presumably to get the vote out for down-ballot races, or to secure the blue states he already has and contest the red states he doesn't. Please note, however, that I wasn't really tracking these before today, so they may have been there all along. The campaign could also be using these offices to have volunteers phone-bank for battleground states. I know that's what is happening in at least some of the California offices. Romney does not have any campaign offices in non-battleground states.
Obama Romney
Missouri 2 7
Michigan 28 (+4) 23
New Hampshire 22 8
Minnesota 12 zero
Colorado 60 (+3) 13
Florida 102 (+4) 47
Ohio 121 (+15) 38 (+3)
Pennsylvania 46 (+1) 24
Virginia 46 (+4) 28
Nevada 26 (+1) 11
North Carolina 53 23
New Mexico 13 (+2) 7
Iowa 66 13
Wisconsin 69 (+1) 23
California 14
Washington 10
Oregon 5
Texas 4
New York 4
South Carolina 3
Massachusetts 2
Tennessee 1
Georgia 1
Louisiana 1
North Dakota 1
Vermont 1
Oklahoma 1
TOTAL: 714 (+83) 265 (+3)
The ratio of Obama campaign offices to Romney campaign offices is nearly three to one now.