The Cambridge Election Commission has mailed the annual city census form to all households. Residents are urged to fill out and return the form in the postage-prepaid envelope sent with it.

The city is required to conduct the annual census by state law. It provides residents with their only official proof of city residency, and all residents – regardless of citizenship and voter registration status – are required to answer it; voters who don’t will be taken off the active voting list and may be taken off voter registration rolls.

The census mailing includes the form, instructions in five languages and a voter registration request form. For information, call the Election Commission at (617) 349-4361 during city office hours: Mondays from 8:30 a.m. to 8 p.m.; Tuesdays through Thursdays from 8:30 a.m. to 5p.m..; and Fridays from 8:30 a.m. to noon.