Place unpeeled potatoes in a large pot and cover with water. Bring to a boil over high heat, then reduce to medium and simmer for 20-25 minutes until tender. Drain and cool with cold water. Peel and chop the potatoes.
In a large bowl, mix the chopped potatoes with diced onion and celery. Season with salt and toss to combine.
In a separate bowl, whisk together mayonnaise, mustard, celery salt, pepper, and pickle relish. Add this dressing to the potato mixture and stir gently. Fold in the diced eggs and adjust seasoning if necessary.
Garnish with paprika, cover, and chill in the refrigerator for at least one hour before serving. DEVOUR!