The first post office in Arnold was established in about 1902.[4] It was discontinued in 2006.[5]
Education
The community is served by Western Plains USD 106 public school district.[6] The Western Plains High School mascot is Bobcats.
Arnold became a part of the Ransom school district in 1960. The Arnold School closed in 1969.[7] USD 106 formed in 2004 by the consolidation of Ransom USD 302 and Bazine USD 304.[8]