Plainfield may refer to:

• Plainfield, Ontario

• Plainfield, California
• Plainfield, Connecticut
  • Plainfield Village, Connecticut
• Plainfield, Georgia
• Plainfield, Illinois
• Plainfield, Indiana, a town in Hendricks County
• Plainfield, St. Joseph County, Indiana, an unincorporated community
• Plainfield, Iowa
• Plainfield, Massachusetts
• Plainfield, Michigan (disambiguation), several places
• Plainfield, New Hampshire, a town
  • Plainfield (CDP), New Hampshire, a census-designated place and village in the town
• Plainfield, New Jersey
• Plainfield, New York
• Plainfield, Ohio
• Plainfield, Pennsylvania
• Plainfield, Vermont, a town
  • Plainfield (CDP), Vermont, a census-designated place and village in the town
• Plainfield (town), Wisconsin
  • Plainfield, Wisconsin, a village mostly within the town

• Plainfield (soil), a soil series found in the Midwestern US and southern Ontario, Canada

• Plainfield Academy (disambiguation)
• Plainfield High School (disambiguation)
• Plainfield Township (disambiguation)
• All pages with titles beginning with Plainfield

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