The Würtemberg I was a class of tender locomotives of the Royal Württemberg State Railways (Königlich Württembergischen Staats-Eisenbahnen, K.W.St.E).
The three locomotives were of the 4-4-0 wheel arrangement and were manufactured by the Norris Locomotive Works in Philadelphia.
They had a round-topped firebox, which sat between the two pairs of driving wheels.
The open cab was level with the outer edge of the frame and was therefore rather narrow.
The locomotives were rebuilt during their service lives and were withdrawn in 1861.