Thomas Benjamin Kay (February 28, 1864 – April 29, 1931) was an American politician and businessman in the state of Oregon.

[2] After the younger Thomas was born, his mother and the rest of the family immigrated to Oregon via the Isthmus of Panama route, arriving in 1864.

[6] He represented district 1 that included Marion County, and was the chairman of the ways and means committee.

[8] He again represented district 1 as a Republican, and served through the 1909 special session of the Oregon Legislative Assembly.

[9] Kay did not run for re-election to the Senate in 1910, and instead was the Republican nominee for Oregon State Treasurer.

[1] He returned to state politics in 1920 and was elected back to the Oregon House, again representing district 1.

[1][3] Additionally, he was on the board of directors of the YMCA, the Illihee Club, the Portland Manufacturers' Association, and at Willamette University in Salem.

[1][3] He also served as director of Oregon's chamber of commerce and president of the state's board of trade.