Walhachin is an unincorporated community in the Thompson Country region of south central British Columbia, Canada. The place is on a south shore bench of the Thompson River between Brassey and Jimmie creeks. The locality, off BC Highway 1, is by road about 77 kilometres (48 mi) northeast of Spences Bridge, 28 kilometres (17 mi) east of Cache Creek, and 66 kilometres (41 mi) west of Kamloops.

Gordon Muriel Flowerdew was an English-born Canadian recipient of the Victoria Cross, the highest and most prestigious award for gallantry in the face of the enemy that can be awarded to British and Commonwealth forces, received for his actions at the Battle of Moreuil Wood.