Katy Railroad

Missouri–Kansas–Texas Railroad

Katy system as of 1918; many of the outlying lines left the system in the 1923 reorganization
Reporting mark	MKT
Locale	Kansas, Missouri, Oklahoma, and Texas
Dates of operation	1870–1988
Successor	Union Pacific
Track gauge	4 ft 8 1⁄2 in (1,435 mm) standard gauge
Headquarters	Dallas, Texas

The Missouri–Kansas–Texas Railroad (reporting mark MKT) is a former Class I railroad company in the United States, with its last headquarters in Dallas. Established in 1865 under the name Union Pacific Railway, Southern Branch, it came to serve an extensive rail network in Texas, Oklahoma, Kansas, and Missouri. In 1988, it merged with the Missouri Pacific Railroad and is now part of Union Pacific Railroad.

In its earliest days the MKT was commonly referred to as "the K-T", which was its stock exchange symbol; this common designation soon evolved into "the Katy".

The Katy was the first railroad to enter Texas from the north. Eventually the Katy's core system would grow to link Parsons, Fort Scott, Junction City, Olathe, and Kansas City, Kansas; Kansas City, Joplin, Columbia, Jefferson City, and St. Louis, Missouri; Tulsa and Oklahoma City, Oklahoma; Dallas, Fort Worth, Waco, Temple, Austin, San Antonio, Houston, and Galveston, Texas. An additional mainline between Fort Worth and Salina, Kansas, was added in the 1980s after the collapse of the Chicago, Rock Island and Pacific Railroad; this line was operated as the Oklahoma, Kansas and Texas Railroad (OKKT).