Tualatin may refer to:

• Tualatin, Oregon, a city in the Tualatin Valley
• Tualatin Academy, a building and former school in Forest Grove
• Tuality Community Hospital, a hospital in Hillsboro
• Tualatin Mountains, a section of the Oregon Coast Range
• Tualatin Plains, a lowland section of the Tualatin Valley
• Tualatin River, a tributary of the Willamette River
• Tualatin Station, a commuter rail station in Tualatin
• Tualatin Valley, the region surrounding the Tualatin River
• Tualatin Valley Highway, a state highway
• Tualatin Valley Fire and Rescue, a regional fire district

• Tualatin (people), a part of the Kalapuya Native American tribe in western Oregon, US
• Tualatin (microprocessor), the final generation of Intel's Pentium III processor

• Tualatin Plains Presbyterian Church, a church near Hillsboro