Milan Assessor. Find Milan Illinois assessor, assessment, auditor's, and appraiser's office, revenue commissions, GIS, and tax equalization departments. Assessors provide information on property and land tax assessment, property listings, values, valuations, property search, and records. Milan Assessor.
1. San Bernadino, California (20,105 square miles) San Bernardino County in California is the largest county in the United States, at 20,105 square miles including both land and water surface area. San Bernardino is also the fifth largest county in terms of population, with 2,035,210 people as of the 2010 census.
With an area of 20,105 square miles, San Bernardino County is the largest county in the United States by area, although some of Alaska's boroughs and census areas are larger.