The Haverhill Democratic City Committee is scheduled to host a meet-and-greet session at 6:30 p.m. Monday with the Democratic candidates for Essex County sheriff in the Haverhill Public Library auditorium. The current sheriff, Frank G. Cousins Jr., is retiring after 20 years in the post. Among the 13 candidates running, the six Democrats are William Castro of Methuen; Kevin Coppinger and Michael Marks of Lynn; Edward J. O’Reilly of Wenham; Jerry Robito of Lawrence; and Paul Russell Jr. of Andover. The meeting is open to the public. For information, call 978-374-6297.Brenda J. Buote can be reached at firstname.lastname@example.org.