Voters across Pennsylvania will choose Democratic and Republican nominees May 21 for a variety of races; in Philly, that includes mayor and City Council; in other counties, row offices, district attorneys, and county commissioners.

April 22 was the last day to register to vote, and this week the Pennsylvania Department of State released its latest numbers on voters across the state.

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Here’s a look at some of the numbers.

How Blue Is Philly? Very.

Philadelphia has nearly 1,700 precincts, and in almost all of them, registered Democrats outnumber registered Republicans. Click on the map for an interactive version.

Where Philly’s Republicans Live

Philly’s registered Republicans are outnumbered by Democrats, but there are still more than 117,000 of them. They are particularly strong in Northeast Philadelphia. Click on the map for an interactive version.

Philadelphia suburbs have grown bluer over time

The suburban counties — Bucks, Chester, Delaware, Montgomery — have shifted in Democrats’ favor over time, and the change is clear in both election results and in voter registrations. Note: In the four charts below, numbers are as of the November elections of each year except 2019, which uses current registrations.