Xystocheir is a genus of millipedes in the family Xystodesmidae. The genus is endemic to California in the United States, where it is distributed in the Coast Ranges and the Sierra Nevada.

Since a 1996 revision there have been 9 species classified in the genus:

• Xystocheir bistipita
• Xystocheir brachymacris
• Xystocheir dissecta
• Xystocheir modestior
• Xystocheir prolixorama
• Xystocheir reducta
• Xystocheir solenofurcata
• Xystocheir stenomacris
• Xystocheir stolonifera

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