United Kingdom
Both clubs below publish a public list that includes the Schnauzer, the FCI medium size. The entries that could be read are members’ names and areas, not kennel names. This directory does not turn those names into kennels.

Black 
Sitting 
Carrying a stick
- Schnauzer Club of Great Britain: breeders. The page says the lists cover all three sizes. No kennel names were readable in the page text.
- Northern Schnauzer Club: list of breeders. A section headed Schnauzers sits apart from Miniature Schnauzer and Giant Schnauzer. Each row is a member’s name, a county, and an area.