Boston voters will take to the polls on Tuesday to narrow a burgeoning field of candidates for a number of open City Council seats ahead of the Nov. 5 election.

Voters will look to narrow a field of 38 candidates vying for seats across four districts and four at-large seats during Tuesday’s preliminary municipal election. Fifteen candidates are competing for the at-large seats, including incumbents Michelle Wu, Althea Garrison, Annissa Essaibi George and Michael Flaherty.

District 5, which includes Roslindale, Mattapan and Hyde Park, will see seven challengers, including Ricardo Arroyo, the younger brother of former at-large councilor Felix G. Arroyo, who stepped down in 2013 to join Boston Mayor Martin J. Walsh’s administration. Outgoing councilor Timothy McCarthy announced his retirement earlier this year.

Ricardo Arroyo said that he hopes to be a voice for the Latino community, which makes up about a fifth the population of Boston, according to WBUR.

In District 7, incumbent Kim Janey will face two competitors; the district includes Roxbury, parts of the South End, Dorchester and the Fenway.

Five candidates are looking to fill the District 8 seat left by incumbent Josh Zakim, who earlier this year told The Boston Globe he was not going to run for re-election to spend more time with his family. District 8 includes Fenway, Mission Hill, Back Bay and Beacon Hill.

There are seven candidates vying for a seat representing District 9, which includes Allston, Brighton and part of the Back Bay, after outgoing councilor Mark Ciommo told supporters he would not seek re-election in April after serving for more than a decade on the legislative panel.

With McCarthy, Zakim and Ciommo set to depart, the 13-member council could see significant gender and racial diversity shifts. The field also includes a number of candidates in their 20s and 30s from professions ranging teaching in public schools, to an electrician and a physical therapist.

There are no preliminary elections in other districts. Polling locations across the city will be open from 7 a.m. until 8 p.m.