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About Onset, Massachusetts

Onset is a census-designated place (CDP) in the town of Wareham in Massachusetts. The population was 1,292 at the 2000 census.

News from Onset

Onset Facts

  • Population Total: 1292
  • Square Miles: 1.1
  • Area Code: 508
  • Elevation: 10
  • Postal Codes: 02558
  • Timezone: North American Eastern