The event – organised by County Antrim Grand Black Chapter and hosted by Antrim Royal Black District Chapter 3 – involved 79 preceptories and 75 marching bands.
Around 4,500 participants, comprising 2,500 sir knights and 2,000 band members, were on parade.
Six districts attended the demonstration – Lisburn No 1, Ballymena No 2, Antrim No 3, Larne No 4, Ballymoney No 5 and Ballyclare No 6.
Assembling at Fountain Hill, the parade made its way to the demonstration field on the Randalstown Road.
The procession route is via Fountain Hill, Fountain Street, Church Street, High Street, Bridge Street, Dublin Road and on to Randalstown Road.
The Last Saturday demonstration was last held in Antrim in 2017.
17. Last Saturday
Enjoying the Royal Black Institution demonstration on Saturday. Photo: Arthur Allison / Pacemaker Press
18. Last Saturday
Stepping out along the route on Saturday in Antrim. Photo: Arthur Allison / Pacemaker Press
19. Last Saturday
Stepping out in Antrim on Saturday. Photo: Arthur Allison / Pacemaker
20. Last Saturday
Stepping out in Antrim on Saturday. Photo: Arthur Allison / Pacemaker