Passport Application Services - Henniker 10 Post Office Pl Henniker, NH 03242 Phone : (603) 428-3285 Business Category Passport Application Services Toll-Free           (800) ASK-USPS Post Office - Henniker 10 Post Office Pl Henniker, NH 03242 Phone : (603) 428-3285 Business Category Post Offices Toll-Free           (800) ASK-USPS United States Postal Service , Phone : (603) 428-3285 United States Postal Service Business Category