Albany Field Office
New York Counties-Albany, Rensselaer, Saratoga, Schenectady, Schoharie, Warren Washington Broome, Chenango, Delaware, Cortland, Tioga, Tompkins, Columbia, Greene, Ulster, Clinton, Essex, Franklin, Cayuga, Jefferson, Onondaga, Oswego, St. Lawrence, Fulton, Hamilton, Herkimer, Lewis, Madison, Montgomery, Oneida, Otsego.
Vermont Counties-Addison, Caledonia, Chittenden, Essex, Franklin, Grand Isle, Lamoille, Orleans, Washington, Bennington, Orange, Rutland, Windham, Windsor.
Albuquerque Field Office
Anchorage Field Office
Atlanta Field Office
Baltimore Field Office
Birmingham Field Office
Lauderdale, Limestone, Madison Jackson, colbert, Lawrence, Morgan, Marshall, Dekalb, Marion, Winston, Cullman, Blount, Etoway, Cherokee, Lamar, Payette, Walker, Jefferson, St. Clair, Calhoun, Cleburne, Pickens, Tuscaloosa, Shelby, Talledega, Clay, Sumter, Green, and Bibb Counties.
Boston Field Office
MA, ME, NH, RI
Buffalo Field Office
Allegheny, Cattarugus, Chautauqua, Chemung, Erie, Genesee, Livingston, Monroe, Niagara, Orleans, Ontario, Schuyler, Seneca, Steuben, Wayne, Wyoming, Yates
Charlotte Field Office
Chicago Field Office
JoDavies, Stephenson, Winnebago, Boone, McHenry, Lake, Carroll, Ogle, Dekalb, Kane, Dupage, Cook, Whiteside, Lee, Kendall, Will, Grundy, LaSalle
Cinncinnati Field Office
Southern Ohio including the cities Athens, Cambridge, Cinncinnati, Columbus, Dayton, Middletown, Portsmouth.
Cleveland Field Office
Cuyahoga, Medina, Portage, Summit, Carroll, Stark, Tuscarawas, Larain, Allen, Auglaize, Hancock, Hardin, Mercer, Paulding, Putnam, Van Wert, Ashland, Crawford, Holmes, Marion, Richland, Wayne, Wyandot, Ashtabula, Geuga, Lake, Erie, Huron, Ottawa, Sandusky, Seneca, Defiance, Fulton, Henry, Lucas, Williams, Wood, Columbiana, Mahoning, Trumbull Counties.
Columbia Field Office
Dallas Field Office
Northern Texas including the cities of Abeline, Amarillo, DFW Airport, Fort Worth, Lubbock, Lufkin, Plano, San Angelo, Sherman, Texarkana, Tyler, Wichtita Falls.
Denver Field Office
Detroit Field Office
El Paso Field Office
Honolulu Field Office
Houston Field Office
South East Texas counties of Madison, Brazos, Grimes, Walker, San Jacinto, Liberty, Hardin, Jasper, Newton, Orange, Jefferson, Montgomery, Waller, Harris, Chambers,Fayette, Austin, Colorado, Fort Bend, Galveston, Brazoria, Wharton, Matagorda, Lavaca, DeWitt, Jackson, Victoria, Goliad, Refugio, Bee, San Patricio, Live Oak, Jim Wells, Arkansas, Nueces, Kleberg, Kennedy, Brooks, Duval.
Indianapolis Field Office
Jackson Field Office
Jacksonville Field Office
Serves part of central Florida and all of Northern Florida including the counties of: Baker, Bradford, Clay, Columbia, Duval, Hamilton, Nassau, St. Johns, Suwannee, Union, Flagler, Putnam, Volusia, Okaloosa, Walton, Alachua, Dixie, Gilchrist, Lafayette, Levy, Citrus, Lake, Marion, Sumter, Bay, Calhoun, Gulf, Holmes, Jackson, Washington, Escambia, Santa Rosa, Franklin, Gadsen, Jefferson, Leon, Liberty Madison, Taylor, Wakulla.
Kansas City Field Office
The state of Kansas and the following counties in Missouri: Barry, Barton, Bourbon, Cherokee, Crawford, Dade, Jasper, Labette, Lawrence, McDonald, Newton, Vernon, Cass, Clay, Bates, Jackson, Johnson, Leavenworth, Linn, Miami, Platte, Ray, Wyandotte, Andrew, Atchison, Buchanan, Caldwell, Clinton, Daviess, DeKalb, Gentry, Grundy, Harrison, Holt, Mercer, Nodaway, Putnam, Sullivan, Worth, Benton, Cedar, Christian, Dallas, Douglas, Greene, Henry, Hickory, Howell, Laclede, Oregon, Ozark, Polk, Pulaski, St. Clair, Stone, Taney, Texas, Webster, Wright, Boone, Callaway, Camden, Carroll, Cole, Cooper, Howard, Johnson, Lafayette, Livingston, Miller, Moniteau, Morgan, Osage, Pettis, and Saline.
Knoxville Field Office
Eastern Tennessee counties of: Anderson, Bedford, Bledsoe, Blount, Bradley, Campbell, Carter, Claiborne, Cocke, Coffee, Franklin, Grainger, Greene, Grundy, Hamblen, Hamilton, Hancock, Hawkins, Jefferson, Johnson, Knox, Lincoln, Loudon, Marion, McMinn, Meigs, Monroe, Moore, Morgan, Polk, Rhea, Roane, Scott, Sequatchie, Sevier, Sullivan, Unicoi, Union, VanBuren, Warren, Washington.
Las Vegas Field Office
Little Rock Field Office
Los Angeles Field Office
Los Angeles Division of the FBI has Federal jurisdiction in Southern California, covering 40,000 square miles encompassing the seven counties of the Central District of California - - San Luis Obispo, Santa Barbara, Ventura, Los Angeles, San Bernardino, Orange, and Riverside.
Louisville Field Office
Memphis Field Office
Western Tennessee including the counties of Shelby Fayette, Tipton, Lauderdale, Dyer, Lake, obion, Weakly, Gibson, Crockatt, Haywood, Madison, Hardeman, Henry, Carroll, Henderson, Chester, McNairy, Hardin, Decatur, Benton, Steward, Houston, Humphreys, Perry, Wayne, Montgomery, Dickson, Hickman, Lewis, Lawrence, Cheatham, Robertson, Davidson, Williamson, Maury, Giles, Sumner, Trousdale, Rutherford, Marshall, Wilson, Smith, Macon, Canon, DeKalb, Smith, Jackson, Clay, Putnam, Overton, Pickett, Fentress, Cumberland.
Miami Field Office
South East Florida including the cities of Miami, North Miami Beach, West Palm Beach, Homestead, Fort Pierce and Key West.
Milwaukee Field Office
Minneapolis Field Office
MN, ND, SD
Mobile Field Office
Southern part of Alabama including the counties of Randolph, Tallapoosa, Chambers, Lee, Macon, Russell, Coosa, Chilton, Autauga, Lowndes, Butler, Elmore, Bullock, Pike, Montgomery, Hale, Perry, Dallas, Wilcox, Selma, Marengo, Choctaw, Clarke, Monroe, Conecuh, Escambia, Monroeville, Washington, Mobile, Baldwin, Barbour, Henry, Geneva, Covington, Dale, Houston, Coffee.
Newark Field Office
New Haven Field Office
New Orleans Field Office
New York Field Office
Boroughs of Brooklyn, The Bronx, Queens, Manhatten, Staten Island and the counties of Dutchess, Nassau, Orange, Putnam, Rockland, Suffolk, Sullivan, and Westchester.
Norfolk Field Office
The Norfolk Division is located in the Hampton Roads area of southeast Virginia. The territory extends from the eastern shore to south of Richmond.
Oklahoma City Field Office
Omaha Field Office
Philadelphia Field Office
Eastern and Middle Districts of Pennsylvania and southern New Jersey.
Phoenix Field Office
Pittsburgh Field Office
West Virginia and the Pennsylvania counties of Allegheny, Armstrong, Beaver, Bedford, Blair, Bulter, Cambria, Clarion, Clearfield, Crawford, Elk, Erie, Fayette, Forest, Green, Indiana, Jefferson, Lawrence, McKean, Mercer, Somerset, Venango, Warren, Washington, Westmoreland.
Portland Field Office
Richmond Field Office
Virginia counties of Buchanan, Dickenson, Grayson, Lee, Russell, Scott, Smyth, Tazewell, Washington, Wise, Allegheny, Bath, Bland, Botetort, Carroll, Craig, Floyd, Franklin, Giles, Montgomery, Patrick, Pulaski, Roanoke, Rockbridge, Wythe, Amherst, Appomattox, Bedford, Buckingham, Campbell, Charlotte, Cumberland, Halifax, Henry Pittsylvania, Albemarle, Augusta, Culpeper, Fluvanna, Greene, Highland, Louisa, Madison, Nelson, Orange, Rockingham, Clarke, Frederick, Page, Rappahannock, Shenandoah, Warren, Amelia, Brunswick, Charles City, Chesterfield, Dinwiddie, Goochland, Greensville, Hanover, Henrico, King William, Lunenburg, Mecklenburg, New Kent, Nottoway, Petersburg City, Powhatan, Prince Edward, Prince George, Richmond City, Surry, Sussex, Caroline, Essex, King George, King & Queen, Lancaster, Middlesex, Northumberland, Richmond, Spotsylvania, Stafford and Westmoreland.
Sacremento Field Office
The Sacramento Division covers an area 700 miles in length and 200 miles wide, including 34 out of the 59 counties in California. The Bakersfield satellite office is 300 miles to the south and the Redding satellite office is 170 miles to the north. The 12 large counties stretch from Stockton south to Bakersfield.
St. Louis Field Office
East Missouri counties of City of St. Louis, Jefferson, St. Louis, Cape Girardeau, Bollinger, Butler, Carter, Dunklin, Iron, Madison, Missiisppi, New Madrid, Pemiscott, Perry, Reynolds, Ripley, Scott, Shannon, St. Francois, Ste. Genevieve, Stoddard, Wayne, Audrian, Clark, Lewis, Marion, Monroe, Pike, Ralls, Adair, Chariton, Knox, Linn, Macon, Rnadolph, Schuyler, Scotland, Shelby, Crawford, Dent, Franklin, Gasconade, Maries, Phelps, Washington, Lincoln, Montgomery, St. Charles, Warren.
St. Lake City Field Office
ID, MT, UT
San Antonio Field Office
Atascosa, Bandera, Bastrop, Bell, Bexar, Blanco, Bosque, Burleson, Burnet, Caldwell, Cameron, Comal, Coryell, Dimmit, Edwards, Falls, Freestone, Frio, Gillespie, Gonzales, Guadalupe, Hamilton, Hays, Hidalgo, Hill, Jim Hogg, Karnes, Kendall, Kerr, Kimble, Kinney, Lampasas, LaSalle, Lee, Leon, Limestone, Llano, Mason, Maverick, McClennan, McCulloch, McMullen, Medina, Milam, Real, Robertson, San Saba, Somervell, Starr, Terrell, Travis, Uvalde, Val Verde, Washington, Webb, Willacy, Williamson, Wilson, Zapata, Zavala.
San Diego Field Office
San Diego and Imperial counties in California.
San Francisco Field Office
Northern and Central coast regions of California.
San Juan Field Office
Seattle Field Office
Springfield Field Office
Central and Southern Illinois counties.
Tampa Field Office
Middle district of Florida including the cities of Tampa, Lakeland, Orlando, Brevard, Pinellas, Ft. Meyers, Sarasota and Naple.
Washington Metropolitan Field Office
Metropolitan Washington DC area.
Note - FBI has 56 field offices as of May 2009. For additional information on field operations, see its website.