US 33 continues into Harrisonburg as Market Street, a four-lane divided highway. The road becomes an undivided highway and then reduces to two lanes at its intersection with SR 42 (High Street) in downtown Harrisonburg, after which the highway intersects a branch of the Norfolk Southern Railway's Roanoke District at grade. US 33 meets the southbound direction of US 11 (Liberty Street), then splits to pass along a two-lane, one-way street surrounding Court Square, the site of the Rockingham County courthouse. The eastern side of the square, Main Street, is followed by northbound US 11. Both directions of US 33 therefore have short but separate concurrencies with each direction of US 11 around the Courthouse, before US 33 exits the downtown Harrisonburg area as Market Street.