Kelly Grimes reviewed Jonril: Gateway to the Sunken Lands in The Space Gamer No. 61.[1] Grimes commented that "Jonril is a very worthwhile setup. It is well put together, and can be used without too much pregame planning. It's well worth the money."[1]
Anders Swenson reviewed Jonril: Gateway to the Sunken Lands for Different Worlds magazine and stated that "Jonril is a well-done, workmanlike adventure aid. it provides a complex, realistic city adequate to most role-playing needs I've come across. The authors have outdone themselves in weaving a net of relationships between the major inhabitants of Jonril. The town is well laid-out, and the businesses are realistically selected, placed, and described."[2]
