Saint John's On The Lake Assisted LivingApartments Saint John's On The Lake Visit Website Request Info 1840 N Prospect Ave Milwaukee, WI 53202 (414) 272-2022 Facebook About Map About Saint John's On The Lake is an open and vibrant senior living community with a history of innovation, striving for diversity and inclusion. Saint John's offers all levels of care. What's Nearby? Distance: 5 10 15 20 25 50 mi.