Lafnitz (river)

The Lafnitz () is a river in southeastern Austria and (briefly) western Hungary.
The Lafnitz is long, and has a basin area of . It rises near the border of Styria and Lower Austria, and flows in a generally southeastern direction through the towns of Rohrbach an der Lafnitz, Lafnitz, Markt Allhau, Wolfau, Wörth an der Lafnitz, Neudau, Deutsch Kaltenbrunn, Rudersdorf, Königsdorf, and Heiligenkreuz im Lafnitztal, and it empties into the Rába less than a kilometer inside Hungary, in the town of Szentgotthárd. For much of its length it forms the border between Styria and Burgenland. Its largest tributary is the .