Kathryn B. Stewart of Vineyard Haven died on Friday, March 20, at the Martha’s Vineyard Hospital. She was 90.

The daughter of Frank and Eleanor Baptiste, Kathryn was born on Feb. 15, 1925 in a house on Beech street in Vineyard Haven. She graduated from Tisbury School in 1942. An active member of her class, she participated in the basketball and softball teams, and numerous musical events.

Kathryn attended Boston University during the war years, completing her bachelor of music degree with music education certification in 1946. She was a member of the Mu Phi Epsilon Sorority, whose mission states what Kathryn demonstrated throughout her life: “to provide support for music in the community in whatever way possible.”

During summers of the war years she was active with the USO as a singer, and socialized and jitter-bugged with troops stationed on the Island.

Her first music teaching job was in a junior high school in Lewiston, Maine.

In 1948, after a longtime summer romance, she married A. Douglas Stewart after he completed his service in the Navy.

The first years of their marriage were spent in New Rochelle, N.Y., and Kathryn taught in Pellham, N.Y.

Daughter Carolee was born in 1950, and the family moved to the Island in 1951, when Douglas was hired to teach in Edgartown. Barbara was born that same year.

During the mid 1950s, Kathryn began teaching one day a week in the three up-Island schools — Gay Head, Chilmark and West Tisbury. Over time, this expanded to full time in West Tisbury and Chilmark. She is remembered fondly for writing songs for the three up-Island towns.

Kathryn was well known for her soprano voice in the Martha’s Vineyard Chorus and Abendmusik, often serving as the soloist. She directed the Martha’s Vineyard Chorus during the late 1950s and later started the Scottish Society singers. After she retired from teaching up-Island, she accompanied for and toured with the Minnesingers in the early 1970s.

Kathryn was an excellent bridge player and was a founding member of the Bridgettes in the 1950s, a bridge club that still exists.

She and her husband were well traveled and they enjoyed many trips with friends and relatives around the world and across the U.S.

A lifelong member of the First Baptist Church of Vineyard Haven, she held membership in many of its organizations, was active in missions and served as financial secretary. She was a member of the choir and succeeded her mother as organist, holding that position along with the post of organist at the Gay Head Community Baptist Church for some 30 years. She had a strong interest in Island history and compiled a history of the Baptist church.

In addition, she held leadership positions in Plymouth Bay Girl Scout Council and was very active with the Red Stocking fund.

Kathryn was predeceased by her husband in March of 2005. In addition to her daughters, Carolee Stewart and Barbara S. Lopes, she is survived by son in law Carl F. Lopes and three grandchildren, Dorian Lopes, Nathan Lopes and Robyn Lopes-Beaulieu.

Visiting hours were held March 23 in the Chapman, Cole and Gleason Funeral Home in Oak Bluffs. Her funeral service was held in the First Baptist Church in Vineyard Haven on Tuesday, March 24. Interment followed in the Oak Grove Cemetery in Vineyard Haven.

Donations may be made in her memory to the First Baptist Church, P.O. Box 806 or to the Island Community Chorus, P.O. Box 4157, both in Vineyard Haven, MA 02568.