Yes Agnetta, there are several Presbyterian Church in Ballymoney and lots just outside.
1st Ballymoney, 2nd Ballymoney (Trinity- started as a Seceder church) & 3rd Ballymoney (St. James'-once known as 2nd Ballymoney but a split from 1st in 1834, so not the correct church). Also Ballymoney Reformed Presbyterian on Charlotte St.
Nearby (just from memory)- Mosside, Toberkeigh (1830), Roseyards (also known as Derrykeighan), Armoy, Drumreagh, Benvarden (don't think it goes back far enough), Dervock (also known as Derrykeighan), Dunloy (too recent), Finvoy, 1st Kilraught, Rasharkin (only started 1830).
I see the IGI has 3 entries listing David Rosborough m.1820 Ballymoney to Elizabeth. Unfortunately none of the records give the source of this information. David is listed as being born at Drumart but usually (although not always) the marriage would have taken place at the bride's church.
P.S. name often spelt Roxborough, Roxborrow, Rosborrow, etc.