Since the release of the 2005 American Community Survey (ACS) data, detailed tables, as well as other tables and maps, use the same numbering scheme.
An ACS detailed table number consists of up to five elements:
1. An initial character which is either “B” or “C.”
A “B” is used for base tables. These tables provide the most detailed estimates on all topics and for all geographies.
A "C" is used for a collapsed version of a "B" table. A "C" table is very similar to a "B" table with the same number (e.g., C07001 and B07001), but two or more lines from the "B" table have been collapsed to a single line in the "C" table. For example, the lines "75 to 79 years", "80 to 84 years" and "85 years and over" from a "B" table may be collapsed to a single line of "75 years and over" in a "C" table.
Not every "B" table has a collapsed version.
2. The next two characters identify the subject of the table.
01 = Age and Sex
02 = Race
03 = Hispanic or Latino Origin
04 = Ancesty
05 = Foreign Born; Citizenship; Year or Entry; Nativity
06 = Place of Birth
07 = Residence 1 Year Ago; Migration
08 = Journey to Work; Workers' Characteristics; Commuting
09 = Children; Household Relationship
10 = Grandparents; Grandchildren
11 = Household Type; Family Type; Subfamilies
12 = Marital Status and History
13 = Fertility
14 = School Enrollment
15 = Educational Attainment
16 = Language Spoken at Home and Ability to Speak English
17 = Poverty
18 = Disability
19 = Income (Households and Families)
20 = Earnings (Individuals)
21 = Veteran Status
22 = Food Stamps
23 = Employment Status; Work Experience; Labor Force
24 = Industry; Occupation; Class of Worker
25 = Housing Characteristics
26 = Group Quarters
27 = Health Insurance
98 = Quality Measures
99 = Imputation table for any subject
3. The next 3 digits are a sequential number, such as 001 or 002, to uniquely identify the table within a given subject.
4. For selected tables, an alphabetic suffix follows to indicate that a table is repeated for the nine major race and Hispanic or Latino groups:
A = White Alone
B = Black or African American Alone
C = American Indian and Alaska Native Alone
D = Asian Alone
E = Native Hawaiian and Other Pacific Islander Alone
F = Some Other Race Alone
G = Two or More Races
H = White Alone, Not Hispanic or Latino
I = Hispanic or Latino
5. For selected tables, a final alphabetic suffix "PR" follows to indicate a table used for Puerto Rico geographies only. These Puerto Rico-specific tables exist because for some geography-based subjects, the wording of the Puerto Rico Community Survey questionnaire differs slightly but significantly from the American Community Survey questionnaire. The matching table used for United States geographies has the same ID but without the trailing "PR" (e.g., B06014 and B06014PR).