U.S. Census Bureau

American Community Survey: understand the measure

Survey documentation for community-level demographic and housing research.

Read the primary source

Data documentation / Varies by release

Data documentation · U.S. Census Bureau

Read with context.

Start with the survey documentation, then select a release and geography that match your question.

Record whether estimates are one-year or five-year and keep margins of error in the evidence pack.

Limits to keep in view

Do not compare incompatible survey products as if they were a simple year-to-year trend.

Connect evidence to action

Choose a question, verify the relevant jurisdiction, and explain the action you are asking someone to take. A source-backed draft is a starting point—not a message sent on your behalf.

Use this in an advocacy brief

Research sources

Source text supports this summary. Human editorial approval, service availability and eligibility are separate checks.

Source-linked reference · Baseline source-linked record; editorial review pending

Related policy & program records

Shared topic, not a claim of causation or eligibility.

Housing

State transition-age support

Extended foster care: AB 12

A pathway to continued support for eligible young adults transitioning from foster care.

California; county child-welfare / probation systems · source checked Sep 6, 2026

Read the policy record batch-02

Your working notes

Keep the context with the claim.

Write the question first

What are you trying to understand? Identify the population and place before looking for a number that might support your position.

Capture the measure

Record the source title, table or indicator, units, reference period and any stated uncertainty. Preserve the original wording of technical definitions.

Distinguish observation from explanation

A difference between groups can prompt further inquiry. It does not, by itself, identify the cause or establish the effect of a particular policy.