Rudy R. Lyle (March 17, 1930 – February 11, 1985) was an American bluegrass banjo player, mostly known for being a member of Bill Monroe's Blue Grass Boys in the period 1949–1954.
When Lyle was young he was taught to play the banjo by Lawrence Wright, a banjoist who hailed from Rocky Mount, Virginia.
In his teens, he joined "Uncle Joe Johnson's band" and appeared on WPAQ radio in Mount Airy, North Carolina.
The band consisted of Monroe, Lyle, Mac Wiseman, Chubby Wise, and Jack Thompson.
In 1954, he worked with Jimmy Dean and later also with artists such as Roy Clark, Claude King, Patsy Cline, Cas Walker and Red Rector.