Congregation Etz Ahaim Sephardic (Hebrew: קהילת קודש עץ החיים, lit. 'The Tree of Life') is a Sephardic Orthodox synagogue located on Denison Street in Highland Park, New Jersey, in the United States. The congregation is a member of the American Sephardi Federation, the Sephardic Jewish Brotherhood of America (La Ermandad Sefaradi) and the Raritan Valley Orthodox Jewish Community Organization (ROCNJ). It is the only Sephardic congregation in Highland Park/Edison area.

The congregation consists of approximately 125 families. Its members and supporters have roots in Israel, Spain, Greece, Turkey, Syria, Europe, North Africa, Persia, Iraq and the United States. Prayers are offered in Hebrew, English and Ladino. It is the oldest Sephardic Jewish congregation in New Jersey.

Jewish immigrants from Salonika, Greece, Turkey and the Balkans settled in the New Brunswick, New Jersey area in the early 20th century. The congregation was originally organized in September 1916 and incorporated on June 27, 1921. However, the original congregation apparently dissolved. In the late 1920s, the congregation was reorganized into "Congregation Es Ahaim Sepharedith" (The Tree of Life), named after the oldest synagogue in Salonica, Greece, Ets ha Chaim. The Congregation was re-founded on March 12, 1927, and incorporated on April 3, 1927. In 1928, when ground was broken for the original synagogue building on July 1, it was the only Sephardic synagogue in New Jersey. The synagogue was on Richmond Street, in the Hiram Market neighborhood of New Brunswick. The name of the congregation was later officially changed to Congregation Etz Ahaim. The congregation moved to its current location in Highland Park in 1962.

The current synagogue was built in 1962, mainly of brick. The building is beautified with Jewish motifs, such as the Tree of Life carved into the wooden front door, two metal seven-branched menorahs on the front wall of the main sanctuary and the Torah Ark היכל with wooden doors carved with a Tree of Life. Tiffany-style stained glass windows in the dome above the main sanctuary bathe the space in rich, radiant colors. The windows form two themes: Jewish Holidays and The Tribes of Israel. It seats 88 in the men's section, and 60 in the women's section, with a wooden mechitza topped with glass. On High Holy Days, the seating is expanded to accommodate 240 people.

Daily prayer services are held mornings and evenings. Minyans on Shabbat number 100 people on a weekly basis. Shabbat Shacharit services are followed by a sit-down kiddush.

Child care and a children's program are offered on Shabbat and Yom Tov. Congregation Etz Ahaim organizes community outreach, philosophy classes and adult education.

It also has an active Sisterhood, the Daughters of Etz Ahaim, as old as the congregation itself. The Sisterhood has organized a cookbook, fundraising activities for the Congregation, food on Yom Tov, Purim baskets, and other activities which support and enhance life in the community.

Highland Park has New Jersey's first eruv. Congregation Etz Ahaim is located inside the eruv. Highland Park has a mikvah.