Kenneth D. Witmer, an operatic and lyric baritone who taught and performed in the Baltimore area for the past decade, died Tuesday at Brandywine Hospital in Coatesville, Pa., of congestive heart failure. He was 34.

Services for Mr. Witmer, who had lived since May in Downington, Pa., will be held at 11 a.m. tomorrow at the Robert A. Harris Funeral Home in Coatesville.

Born and reared there, he received his undergraduate degree from Muhlenberg College in Pennsylvania and his master's in vocal performance in 1981 from the Peabody Institute in Baltimore.

Mr. Witmer remained in the area for the next decade, studying and performing. He had a studio in Baltimore's Hampden section, where he taught voice to local singers.

Survivors include his mother, Marybelle Reiter Witmer of Downington; a brother, Kirk H. Witmer, and a sister, Karen Caporale, both of Coatesville; his maternal grandmother, Gail O. Reiter of Parksburg, Pa.; a niece; and several nephews.

The family suggested memorial donations to the Olivet United Methodist Church, Third Avenue and Chestnut Street, Coatesville 19320, where Mr. Witmer was a member and formerly sang in youth choirs.