Wood v. Fort Wayne is a United States Supreme Court case that was decided in 1886. The case involved a dispute between the city of Fort Wayne, Indiana and the Fort Wayne and Wabash Valley Railway Company. The city had passed an ordinance that required the railway company to build a bridge over a certain street in the city. The railway company refused to comply with the ordinance, arguing that it was unconstitutional. The Supreme Court ultimately sided with the railway company, ruling that the ordinance was unconstitutional. The Court held that the ordinance was an unconstitutional taking of private property without just compensation. The Court reasoned that the ordinance was an exercise of the city's police power, which was limited to the regulation of the use of property, not the taking of it. The Court also held that the ordinance was an unreasonable exercise of the city's police power, as it was not necessary to protect the public health, safety, or welfare. The decision in Wood v. Fort Wayne established the principle that the government cannot take private property without just compensation. This principle is still in effect today and is an important part of the Fifth Amendment to the United States Constitution.

In the case of Wood v. Fort Wayne, Justice Field delivered a dissenting opinion in which he argued that the city had no authority to pass an ordinance requiring property owners to construct sidewalks at their own expense. He maintained that such an ordinance was not within the scope of police power granted by state law and thus violated constitutional protections against taking private property for public use without just compensation. Furthermore, he noted that if cities were allowed to impose such requirements on individuals, it would lead to arbitrary and oppressive regulations with little or no benefit for citizens as a whole. In conclusion, Justice Field concluded that while municipalities may have some limited powers over local matters related to health and safety, they do not possess absolute control over all aspects of life within their jurisdiction; instead they must act in accordance with both state laws and constitutional principles when making decisions regarding private property rights.