Whitemarsh Township | 2021 Primary Election | Sample Ballots and How to Vote April 30th, 2021 | By Kevin Tierney The primary election is quickly approaching. It is scheduled for Tuesday, May 18th. Below are sample ballots and polling locations for each district in Whitemarsh Township. If you do not know your ward, you can determine your polling location here. To vote in the primary election, you must be registered by May 3rd. If you want to vote by mail, the deadline is May 11th and instructions can be found here. If you are planning to drop your ballot at one of the 11 drop boxes in the county, details on locations can be found here.