This chapter provides detail description of foot arthritis. Chapter has 92 well illustrated diagrams and pictures. Post traumatic arthritis, Hindfoot arthritis, motion of the hindfoot following arthrodesis procedures, midfoot arthritis, Schon classification of midfoot, Charcot arthropathy, hallux rigidus, Coughlin and Shurnas classification of hallux rigidus, joint sparing procedures and joint destructive procedures are described in detail covering etiopathogenesis, clinical presentation, diagnosis and management. 4 tables are included to highlight motion of hind foot following arthrodesis procedures, commonly measured radiographic parameters of foot, Schon classification and Coughlin and Shurnas classification. 198 references are included at the end of the chapter to facilitate further reading.