The city of Crystal Lake is located in McHenry County about 50 miles northwest of Chicago. The city has grown…More significantly throughout the years with the population expanding from 14,000 in the early 1970's to more than 40,000 today. Crystal Lake is the largest city in McHenry County. Crystal Lake is best known for its parks and lakes. More than 1,600 acres of parks and open land are located in the city as well as the 230-acre Crystal Lake, which is enjoyed by the residents for swimming, boating, fishing and even skating in the winter. Crystal Lake has two large school districts within its borders, Elementary School District 47 and Community High School District 155. The city also offers a number of private schools and preschools. The Crystal Lake government is comprised of a mayor, city manager and city council. The city council meetings take place the first and third Tuesday of every month at 7:30 p.m. at the City Council Chambers inside City Hall. The city offers police, fire and rescue, buildings and grounds and a parks department.