Thomas Daniel Danner was an American politician from Pennsylvania who represented Northampton County in the Pennsylvania Senate in the 18th district as a Democrat for one term from 1903 to 1906.

He attended Weaversville Academy in East Allen Township, Pennsylvania and then Keystone State Normal School in Kutztown, Pennsylvania, where he completed his undergraduate degree.

He was elected chair of the Northampton County Democratic Committee, serving from 1901 to 1904.

After retiring from politics he resumed his law practice in Easton and served as the Northampton County Orphan's court Clerk.

Danner died from liver cancer in Easton, Pennsylvania, on September 19, 1929, at the age of 78.