Celery and Stilton Soup
Recipe for a chicken stock-based soup containing trimmed and finely chopped celery sticks and crumbled Stilton cheese, at The Dinner Co-op Home Page.

Cream of Lentil Soup with Celery Root Flan - Restaurant Antoine
A full recipe making five servings, at RecipeSource.

Cream of Celery Soup
Simple recipe using milk; serving six, at RecipeSource.

Tomato, Orange and Celery Soup
A full recipe making four servings, at Recipesource.