In 1966, while working on a car, Reverend Dr. Phillip W. Davis, Sr. received a direct message from God to “Go preach my gospel.” In March 1974, under the direction of the Holy Spirit, Pastor Davis and 14 members met in the home of his sister-in-law and established the Inter-denominational Church of God (ICOG).

In April 1974, Pastor Davis and devoted members worshipped in their first physical building at Rock Terrace High School, Rockville, MD. As the congregation grew, a permanent building was needed for worship. In October 1974, a church building on West Jefferson Street in Rockville, MD was leased. During this time, the church increased in membership and established ministries. Also in this year, ICOG’s Global Outreach began in Germany.

In 1980, a church building on Brookes Avenue in Gaithersburg, MD was purchased. In February 1981, Pastor Davis ordained his spiritual son, Pastor Thomas Pumphrey, as the Assistant Pastor who remained in this role for 38 years. With God’s direction, the relationship with our sister church in Germany continued to flourish and ICOG experienced an explosion of ministries and the church membership, which now represents over 15 countries.

As the need for ministries grew, Pastor Davis realized that it was time to move to a larger building and leave our Brookes Avenue location. In November 1999, Pastor Davis and his congregation moved to a temporary location on West Diamond Avenue, Gaithersburg, MD. Through faith and  belief that God would grant us favor, 30 acres of property for the future home of ICOG were purchased. On July 8, 2000, ICOG’s family celebrated a major milestone in the church’s history—the groundbreaking of a new church sanctuary! In June 2002, Pastor Davis and the ICOG congregation moved into a new custom-built church currently located on 19201 Woodfield Road, Gaithersburg, MD.

In 2012, Pastor Davis retired at the tender age of 90 and became Pastor Emeritus of ICOG, and Assistant Pastor Pumphrey was installed as the Senior Pastor of ICOG.

Pastor Pumphrey retired in 2019. He has served at ICOG since 1975 and continues to actively serve as the Pastoral Care Pastor of ICOG’s leadership team.

In 2020, Pastor Antonio Cyrus was ordained and named the Senior Pastor of ICOG. Pastor Cyrus grew up in ICOG and followed in the footsteps of his parents, Ministers Arnold and Audrey Cyrus, who also served as ministers at the church.

Over the past 50 years, ICOG has licensed over 20 ministers into the gospel of Jesus Christ. In January 2013, Pastor Kimberly Jackson was ordained into the ministry as the current Associate Pastor. Pastor Jackson and her husband Leon work with the youth through Children’s Church and the Verified Youth Ministry at ICOG.