Turnout appears to be very light in Tuesday’s special election to replace Edward J. Markey in the US House.

In Cambridge, just 4 percent of eligible voters had showed up as of 11 a.m., according to Lesley Waxman, assistant director of the city’s Election Commission. In Melrose, city clerk Mary Rita O’Shea estimated that turnout was about 10 percent as of 3:30 p.m. Or, as she put it, “It’s low.”

Secretary of State William F. Galvin had predicted that as few as 10 percent of eligible voters might show up in the Fifth Congressional District, which reaches from Woburn to Watertown and from Winthrop to Southborough.

Advertisement - Continue Reading Below

Brian McNiff, Galvin’s spokesman, said Tuesday that he had not heard any reports of lines at polling places. “I don’t think it’s changed from the low-turnout predictions,” he said.

State Senator Katherine M. Clark, a Melrose Democrat, is heavily favored to win the election. She faces three little-known candidates: Frank J. Addivinola, Jr., a Republican, James V. Aulenti, an independent, and James O. Hall of the Justice Peace Security Party.

The district is heavily Democratic and favored President Obama over Mitt Romney by more than 30 percentage points in 2012. Markey held the seat from 1976 until his election to the US Senate this summer.