Research by era

1940–1950

The 1940 and 1950 federal censuses are public; later schedules remain restricted. Use directories, newspapers and official request routes for other periods.

Build the period checklist

Illustration of an archive table with a fictional portrait, map, ledger and magnifying glass — Illustration · An imagined historical research table

Record ladder

Search the period, not today’s interface.

Place and jurisdiction

Locate the boundary, county, parish, ward, district or institution that existed then.

Household and community

Use censuses, tax lists, directories or neighbors when the period supports them.

Event record

Target the record created by the event: land, probate, court, church, vital, military or immigration.

Context and cross-check

Use maps, newspapers and a second independent record to test identity.

Source notePublic U.S. federal population census schedules currently run from 1790 through 1950; later schedules remain restricted under the 72-year rule.

Illustration of a historic reading room with fictional ledgers, manifests and newspaper pages — Illustration · Historical atmosphere, not a particular archive

Period worksheet

Carry these five fields into every catalog.

Field	Question
Person	What spelling and relationship clues are known?
Place	What was the jurisdiction at the time?
Period	What date window is supported by evidence?
Event	What action might have created a record?
Gap	Which missing source requires a substitute?

Official starting points