Your Collin County Democratic Party office provides a wide range of resources throughout the year to our candidates and communities. Your contributions allow us to have a central location for candidates and voters during elections. Strengthen the Democratic Party in your city by becoming a sustaining donor to the Collin County Democratic Party. Donate with FastAction or with automatic payments from your bank to the Collin County Democratic Party 1915 Central Expy #150, Plano, TX 75075.