Lake Killarney is a subdivision surrounding a private lake located near the Fox River in unincorporated Cary, Illinois, Algonquin Township. It is located 45 miles (72 km) northwest of Chicago. Residents have lake rights to an 80-acre (320,000 m2) spring fed lake. Fishing is productive. Sail, row, and paddle boats can easily navigate the lake for fun or for fishing.
Lake Killarney is a 80-acre (320,000 m2) glacial lake located in McHenry County, northwest of Cary, Illinois. The lake has a maximum depth of 40 feet (12 m), an average of 10 feet (3.0 m), and a storage capacity of 345 acre feet (426,000 m3). Lake Killarney serves as a recreational lake. The lake is stocked yearly with Walleye, Large Mouth Bass, Small Mouth Bass, and Northern Pike. Residents practice catch and release to assure the fish stay plentiful. A valid Illinois Fishing license is required. Swimming, fishing, row-boating or canoeing, and sail-boating are the major uses of the lake. Access is limited to organization members only. No motors of any kind are allowed on the lake.
The Lake Killarney Home Owners Association was incorporated March 15, 1962, and is the sole owner of the "Common Properties" known as Lake Killarney (the lake itself), its two beaches, parkland areas, along with various sections of property surrounding the lake.
Lake Killarney residents enjoy several annual events including a Christmas tree burn in January, an Easter Egg Hunt at Easter time, an annual neighborhood garage sale in May, a pig roast and fishing contest in August each year and a Halloween party in October. Residents participate in Beach cleanup for East and West beach in May. Board meetings are held each month and there are 2 general membership meetings each year to decide on budget and other issues.