Structure of SIC Codes

Structure of the Standard Industrial Classification

The structure of the Standard Industrial Classification (SIC) makes it possible to tabulate, analyze, and publish establishment data on a Division, a two-digit Major Group, a three-digit Industry Group, or a four-digit Industry Code basis, according to the level of industrial detail considered most appropriate. According to the U.S. Government, an agency may use additional subdivisions within specific four-digit Industries in adopting this classification for its own use, while still retaining comparability with the classifications used by other agencies. The result of these subdivisions is the Extended SIC Codes, which are widely in-use today.

It should be noted that the digit "9" appearing in the third- or fourth-digit position of the classification code usually designates miscellaneous three-digit Industry Groups or four-digit Industries covering establishments not elsewhere classified. These residual classifications do not usually constitute homogeneous primary activity groups; for purposes of this classification system they are grouped together and treated as a separate industry to retain the homogeneity of the other industries in the group.

SIC Structure Table

US Govt. SIC Codes Extended SIC Codes
Division Title Major Group
2-digit
Industry Group
3-digit
Industry
4-digit
Total 6-digit 7-digit 8-digit
A
01-09
Agriculture, Forestry, Fishing 5 23 58 86 245 662 525
B
10-14
Mining 4 20 31 55 98 410 362
C
15-17
Construction 3 14 26 43 522 780 410
D
20-39
Manufacturing 20 140 459 619 2,709 10,930 9,571
E
40-49
Transportation & Public Utilities 10 37 67 114 424 732 451
F
50-51
Wholesale Trade 2 18 69 89 2,082 3,315 1,757
G
52-59
Retail Trade 8 41 64 113 1,288 1,835 859
H
60-67
Finance Insurance, Real Estate 7 30 53 90 298 576 378
I
70-79
Services16711502372,7034,2692,260
J
91-99
Public Administration8222858156412356

Total834161,0551,50410,525*23,921*16,929*


*Note: Extended SIC Codes are continuously being updated to reflect the current marketplace