​The Democratic and Republican Primary Runoff Elections in Collin County are being held as two separate elections. The Democratic Party Primary Runoff Election is only in State Senate District 30, and will only be conducted at polling locations within that district. Only eligible voters who reside within State Senate District 30 may vote in the Democratic Party Primary Runoff Election. The Republican Party Primary Election contains multiple countywide contests, and will be conducted at polling locations throughout Collin County​