Nine-Tailed Demon Fox

Name: Nine-tailed Demon Fox, "Demon Fox", English TV "The Nine-Tailed Fox Spirit/Demon"
Creature type: Kitsune (Fox)
Host: Naruto Uzumaki
Unique traits: Near-limitless chakra, incredible strength
Status: Active, sealed in host
The nine-tailed demon fox is a truly powerful beast; a single swipe of one of its nine tails can raise tsunamis and flatten mountains. After the demon fox attacked Konohagakure, the Fourth Hokage sealed it into the newborn Naruto by using the Dead Demon Consuming Seal, sacrificing his own life to do so.

Eight-Tailed Beast

Name: Eight-Tails (Hachibi)
Creature Type: An Ox and an Octopus
Host: Kira Hachi
Unique Traits: Unknown
Status: Active, sealed in host

Seven-Tailed Demon

Name: Seven Tails
Host: Unnamed Waterfall ninja
Unique traits: Unknown
Status: Captured and sealed by AkatsukiInformation: Akatsuki captured this Waterfall Jinchuuriki and its Bijuu at some point in the past. 

Six-Tailed Demon

Name: Six Tails
Host: Unnamed ninja
Unique traits: Unknown
Status: Captured and sealed by Akatsuki
Information: Akatsuki captured this Jinchuuriki and its Bijuu at some point in the past.

Five-Tailed Demon

 Name: Five Tails
Host: Unnamed Rock ninja
Unique traits: Unknown
Status: Captured and sealed by Akatsuki
Information: Akatsuki captured this Rock Jinchuuriki and its Bijuu at some point in the past. It is unknown what animal the tailed demon was or which Akatsuki member captured it. Two of the unseen captured Jinchuuriki's were outcasts, who were abandoned by their village when Akatsuki came to capture them.

Four-Tailed Demon

Name: Four Tails
Host: Unnamed elderly man
Unique traits: Access to many types of paraelemental chakra
Status: Captured and sealed by Akatsuki

Three-Tailed Demon Turtle

Name: Three Tails
Creature type: Unknown (turtle-like creature)
Host: None
Unique traits: Unknown
Status: Captured and sealed by Akatsuki