Daily AncestorInsur.
Insur. means insurance, as in Agt., Insur. for an insurance agent; it was an approved abbreviation in the 1900 census occupation column.
Insur. is one of the twenty abbreviations the 1900 census instructions allowed in the occupation column. The same instructions asked enumerators to tell apart a real estate agent, an insurance agent and other kinds of agents, so Agt., Insur. is a typical entry.
City directory abbreviation keys often shorten the word further, to ins. Read the word before it: Agt. is the agent who sold policies, while Secy. or Treas. names an officer of an insurance company.
As seen in a recordOccupation column of the 1900 census
Agt., Insur.
Sources
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Daily Ancestor. "Insur.." Dictionary of Old Record Words. https://dailyancestor.com/dictionary/abbreviations/insur. Last checked 2026-10-12.