canvasser

(noun) a petitioner who solicits contributions or trade or votes. Synonyms: solicitor.

(noun) someone who examines votes at an election. Synonyms: scrutineer.

(noun) someone who conducts surveys of public opinion. Synonyms: pollster, poll taker, headcounter. Examples: "A pollster conducts public opinion polls." "A headcounter counts heads."

(noun) a person who takes or counts votes.