In a large bowl, use your hands to mix together with the ground chicken, breadcrumbs, Greek yogurt, ranch seasoning, lemon juice, lemon zest, salt, and pepper. Make sure not to overmix. If the mixture is too wet, add more breadcrumbs.
Cook the chicken burgers on the grill or in a pan, about 4-5 minutes per side until cooked through. Brush the burgers with olive oil before cooking on the grill so they don’t stick. If cooking in a pan, add some olive oil or cooking spray to prevent sticking.