Biblical Eldership/All New Testament Churches Had Elders
From Gospel Translations
Elders in All the Churches that Paul Founded
When they had appointed elders for them in every church, having prayed with fasting, they commended them to the Lord in whom they had believed.
Elders in the Church at Jerusalem
And when Paul and Barnabas had great dissension and debate with them, the brethren determined that Paul and Barnabas and some others of them should go up to Jerusalem to the apostles and elders concerning this issue.
Elders in Ephesus
From Miletus he sent to Ephesus and called to him the elders of the church.
Elders in All the Churches of Crete
For this reason I left you in Crete, that you would set in order what remains and appoint elders in every city as I directed you.
Elders in All the Churches of the Dispersion of the Roman Empire
James 1:1; 5:14
James, a bond-servant of God and of the Lord Jesus Christ, To the twelve tribes who are dispersed abroad: Greetings. . . . Is anyone among you sick? Then he must call for the elders of the church and they are to pray over him, anointing him with oil in the name of the Lord.
Elders in All the Churches in Pontus, Galatia, Cappadocia, Asia, and Bithynia
1 Peter 1:1; 5:1
Peter, an apostle of Jesus Christ, To those who reside as aliens, scattered throughout Pontus, Galatia, Cappadocia, Asia, and Bithynia, who are chosen. . . . Therefore, I exhort the elders among you, as your fellow elder and witness of the sufferings of Christ, and a partaker also of the glory that is to be revealed, shepherd the flock of God.