Courthouses in Dunkirk, New York, the US. Courthouses locations in Dunkirk, New York. Find the nearest courthouses locations, near you. All types of business services Accounting ATM Bank Courthouse Finance Funeral home Insurance Lawyer Real estate School University All courthouses in Dunkirk Closed now Town of Sheridan Court Courthouse +1 716-672-2600 2775 U.S. 20, Dunkirk, New York 14048 Write a review Phone Hours Website Directions