New survey data finds many voters concerned about the upcoming midterm elections, though historical patterns show no clear connection between voter worry and turnout.
Central Election Commission chairwoman Ella Pamfilova said more than 67.4 million people cast ballots.
Turnout stood at 52.62% as of mid-afternoon Moscow time, according to official data.
Russia's Central Election Commission said voter turnout reached 45.1% in the latest parliamentary election, according to a statement on its website.
Russia’s Central Election Commission said voter turnout had surpassed 32.58% as of 2:00 p.m. Moscow time on election day.