Marcinkowo may refer to:

• Marcinkowo, Greater Poland Voivodeship (west-central Poland)
• Marcinkowo, Inowrocław County in Kuyavian-Pomeranian Voivodeship (north-central Poland)
• Marcinkowo, Mogilno County in Kuyavian-Pomeranian Voivodeship (north-central Poland)
• Marcinkowo, Braniewo County in Warmian-Masurian Voivodeship (north Poland)
• Marcinkowo, Mrągowo County in Warmian-Masurian Voivodeship (north Poland)
• Marcinkowo, Olsztyn County in Warmian-Masurian Voivodeship (north Poland)
• Marcinkowo, Ostróda County in Warmian-Masurian Voivodeship (north Poland)

• Highway 68 (Ontario)
• Highway 68 (Oregon)
• Highway 68 (West Virginia)
• Highway 690
• Highway 695
• Highway 69 (Arkansas)
• Highway 69 (Ontario)
• Highway 69 (West Virginia)
• Highway 6 (Arkansas)
• Highway 6 (Georgia)
• Highway 6 (Iraq)
• Highway 6 (Minnesota)
• Highway 6 (Ontario)
• Highway 6 runs both ways
• Highway 6 (West Virginia)
• Highway 701
• Highway 7042 (Ontario)
• Highway 705
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• Highway 705 (West Virginia)
• Highway 7087 (Ontario)
• Highway 7094 (Ontario)
• Highway 70 (Iowa)
• Highway 70 (Israel)
• Highway 70 (West Virginia)