Alcester Sd City Of--post Office Alcester, SD 57001 Phone : (605) 934-2450 Business Category Post Offices Government Offices & Public Schools Post Office - Alcester 111 Dakota St Alcester, SD 57001 Phone : (605) 934-2450 Business Category Government Offices-Federal Post Offices Government Offices & Public Schools Toll-Free           (800) ASK-USPS Fax           (605) 357-4906