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 table number consists of up to five elements:
1. Initial character(s):
- B = Base table. These tables provide the most detailed estimates on all topics and for all geographies.
- C = Collapsed table. These “C” tables are very similar to "B" tables 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 corresponding collapsed table.
- S = Subject Table. Subject Tables are similar to Data Profiles but include more detail, and are classified by subject.
- R = Ranking Table. These tables provide state rankings of estimates across 86 key variables.
- GCT = Geographic Comparison Table. These tables compare many geographic areas (e.g., counties or congressional districts) for key variables.
- DP = Data Profile. These profiles provide broad social, economic, housing, and demographic information.
- NP = Narrative Profile. These profiles summarize the information in the data profiles using concise, nontechnical text. (Note: Current versions only published on census.gov/acs.)
- CP = Comparison Profile. These profiles contain the same layout as data profiles, but offer comparisons of estimates over time across ACS datasets.
- K20 = Supplemental Table. These detailed tables are tabulated on the 1-year microdata for geographies with populations of 20.000 or more.
2. The next two characters identify the subject of the table (except for Data Profiles and Narrative Profiles):
- 01 = Age and Sex
- 02 = Race
- 03 = Hispanic or Latino Origin
- 04 = Ancestry
- 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 to Work
- 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
- 28 = Computer and Internet Use
- 98 = Quality Measures
- 99 = Imputation table for any subject
3. The next 2 or 3 digits are a sequential number, such as 001 or 002, that uniquely identifies 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 is available 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. (For example, the ACS asks “When did this person come to live in the United States?” whereas the PRCS asks “When did this person come to live in Pueto Rico?”) The comparable United States table has the same ID but without the trailing "PR" (e.g., B06014 and B06014PR).