No, Mississippi does not have an official state amphibian.
Minnesota does not have an official state amphibian. The best candidate is the Northern Lepoard Frog, which was proposed as the Minnesota state amphibian by HF737 in 1999 and by HF3471/SF3103 in 1998.
The state amphibian of Louisiana is the green tree frog. The amphibian was chosen as the state amphibian in 1993.
The state of California currently does not have a state amphibian.
Kentucky currently does not have a state amphibian.
No, Oregon does not currently have a state amphibian.
The North American Bullfrog is the state amphibian of Missouri.
The Eastern Tiger Salamander is the state amphibian of Illinois.
The state amphibian of New Mexico is the New Mexico Spadefoot Toad.
Maryland does not have (at this present time) a state amphibian.
The Pacific Chorus Frog is the state amphibian of Washington.
Not all states have a state amphibian. Hawaii is one of them.
The Tennessee Cave Salamander is the state amphibian of Tennessee.