Sakai (坂井郡, Sakai-gun) was a district located in Fukui Prefecture, Japan.

As of October 1, 2005, the district had an estimated population of 92,312 with a density of 439.77 persons per km². The total area is 209.91 km².

Prior to its dissolution, the district consisted of six towns:

• Awara^[a]
• Harue^[a]
• Kanazu^[a]
• Maruoka^[a]
• Mikuni^[a]
• Sakai^[a]

Notes

• On March 1, 2004 - The former town of Awara absorbed the town of Kanazu to form the city of Awara.
• On March 20, 2006 - The former town of Sakai absorbed the towns of Harue, Maruoka and Mikuni to form the city of Sakai. Sakai District was dissolved as a result of this merger.

• List of dissolved districts of Japan