Robert Martin Lusk (January 25, 1851 – February 21, 1913) was a lawyer, politician and judge in Texas and California.

He attended Hiwassee College and was graduated from the law department at Cumberland University, both in Tennessee.

He practiced law in Dalton, Georgia, and in Bonham, Texas, where he was elected mayor and was then prosecuting attorney for the county.

In 1905 he was appointed to the council to fill the unexpired term of John D. Works, who was running for the U.S. Senate.

[2] He died in his Los Angeles home at 147 North Soto Street on February 21, 1913, and a funeral service was held two days later at Boyle Heights Presbyterian Church, conducted by the Reverend L. C. Kirkes, pastor.