It’s Primary Day in New York. Here’s What to Know.

Tuesday is Primary Day in New York.

A number of high-profile races are on the ballot, including an expensive and bitterly fought Democratic contest between Representative Jamaal Bowman and George Latimer in a district covering parts of Westchester County and the Bronx.

Other congressional contests have also drawn interest, including one in eastern Long Island, where a media and political luminary made a late entry into the Democratic primary against an established candidate.

The Democratic-led State Legislature is also up for election in November, and a number of Assembly primary races are expected to be close.

Here’s what to know.

Finding out where to vote

Polls will open at 6 a.m. and close at 9 p.m. Voters can find their local polling places on the Board of Elections website.

New York is a closed primary state, meaning Democrats and Republicans can vote only in their own parties’ primaries. Unaffiliated or independent voters cannot participate in the primary. The last day to register to vote ahead of the primaries was June 15, and early voting ended Sunday.

All absentee ballots must be dropped off at a polling place by 9 p.m. or postmarked June 25.

The heavyweight matchup

The results of Tuesday’s contest in the 16th Congressional District between Mr. Bowman and Mr. Latimer may serve as harbingers of many political benchmarks.