Town Hall Address 408 NH Route 145 Clarksville, NH 03592 United States- Coos County Town Clerk (603) 246-7751 twnclark@yahoo.com Mon 1 P.M. - 5 P.M.; Tue & Thu 9 A.M. - 4 P.M.; Wed 12:30 P.M. - 6:30 P.M. 408 NH Route 145 Clarksville, NH 03592 United States Tax Collector (603) 246-7751 twnclark@yahoo.com Mon 1 P.M. - 5 P.M.; Tue & Thu 9 A.M. - 4 P.M.; Wed 12:30 P.M. - 6:30 P.M. 408 NH Route 145 Clarksville, NH 03592 United States Assessor http://data.avitarassociates.com/ United States Town Hall Hours Mon 1 P.M. - 5 P.M.; Tue & Thu 9 A.M. - 4 P.M.; Wed 12:30 P.M. - 6:30 P.M. County Coos