Justice White wrote the opinion of the Court:
In March 7, 1980, a teacher at Piscataway High School in Middlesex County, N. J., discovered two girls smoking in a lavatory. One of the two girls was the respondent T. L. O., who at that time was a 14-year-old high school freshman. Because smoking in the lavatory was a violation of a school rule, the teacher took the two girls to the Principal’s office, where they met with Assistant Vice Principal Theodore Choplick. In response to questioning by Mr. Choplick, T. L. O.’s companion admitted that she had violated the rule. T. L. O., however, denied that she had been smoking in the lavatory and claimed that she did not smoke at all.
Mr. Choplick asked T. L. O. to come into his private office and demanded to see her purse. Opening the purse, he found a pack of cigarettes, which he removed from the purse and held before T. L. O. as he accused her of having lied to him. As he reached into the purse for the cigarettes, Mr. Choplick also noticed a package of cigarette rolling papers. In his experience, possession of rolling papers by high school students was closely associated with the use of marihuana. Suspecting that a closer examination of the purse might yield further evidence of drug use, Mr. Choplick proceeded to search the purse thoroughly. The search revealed a small amount of marihuana, a pipe, a number of empty plastic bags, a substantial quantity of money in one-dollar bills, an index card that appeared to be a list of students who owed T. L. O. money, and two letters that implicated T. L. O. in marihuana dealing.
Mr. Choplick notified T. L. O.’s mother and the police, and turned the evidence of drug dealing over to the police. At the request of the police, T. L. O.’s mother took her daughter to police headquarters, where T. L. O. confessed that she had been selling marihuana at the high school. On the basis of the confession and the evidence seized by Mr. Choplick, the State brought delinquency charges against T. L. O. in the Juvenile and Domestic Relations Court of Middlesex County. Contending that Mr. Choplick’s search of her purse violated the Fourth Amendment, T. L. O. moved to suppress the evidence found in her purse as well as her confession, which, she argued, was tainted by the allegedly unlawful search.
The court concluded that the search conducted by Mr. Choplick was a reasonable one. The court on March 23, 1981, found T. L. O. to be a delinquent and on January 8, 1982, sentenced her to a year’s probation.
In determining whether the search at issue in this case violated the Fourth Amendment, we are faced initially with the question whether that Amendment’s prohibition on unreasonable searches and seizures applies to searches conducted by public school officials. We hold that it does.
It is now beyond dispute that “the Federal Constitution, by virtue of the Fourteenth Amendment, prohibits unreasonable searches and seizures by state officers.” Equally indisputable is the proposition that the Fourteenth Amendment protects the rights of students against encroachment by public school officials.
These two propositions – that the Fourth Amendment applies to the States through the Fourteenth Amendment, and that the actions of public school officials are subject to the limits placed on state action by the Fourteenth Amendment – might appear sufficient to answer the suggestion that the Fourth Amendment does not proscribe unreasonable searches by school officials. However, the State of New Jersey has argued that the history of the Fourth Amendment indicates that the Amendment was intended to regulate only searches and seizures carried out by law enforcement officers; accordingly, although public school officials are concededly state agents for purposes of the Fourteenth Amendment, the Fourth Amendment creates no rights enforceable against them.
We have held school officials subject to the commands of the First Amendment, see Tinker v. Des Moines Independent Community School District, and the Due Process Clause of the Fourteenth Amendment, see Goss v. Lopez. If school authorities are state actors for purposes of the constitutional guarantees of freedom of expression and due process, it is difficult to understand why they should be deemed to be exercising parental rather than public authority when conducting searches of their students. More generally, the Court has recognized that “the concept of parental delegation” as a source of school authority is not entirely “consonant with compulsory education laws.” In carrying out searches and other disciplinary functions pursuant to such policies, school officials act as representatives of the State, not merely as surrogates for the parents, and they cannot claim the parents’ immunity from the strictures of the Fourth Amendment.
To hold that the Fourth Amendment applies to searches conducted by school authorities is only to begin the inquiry into the standards governing such searches. Although the underlying command of the Fourth Amendment is always that searches and seizures be reasonable, what is reasonable depends on the context within which a search takes place. The determination of the standard of reasonableness governing any specific class of searches requires “balancing the need to search against the invasion which the search entails.” On one side of the balance are arrayed the individual’s legitimate expectations of privacy and personal security; on the other, the government’s need for effective methods to deal with breaches of public order.
We have recognized that even a limited search of the person is a substantial invasion of privacy. We have also recognized that searches of closed items of personal luggage are intrusions on protected privacy interests, for “the Fourth Amendment provides protection to the owner of every container that conceals its contents from plain view.” A search of a child’s person or of a closed purse or other bag carried on her person, no than a similar search carried out on an adult, is undoubtedly a severe violation of subjective expectations of privacy.
Of course, the Fourth Amendment does not protect subjective expectations of privacy that are unreasonable or otherwise “illegitimate. To receive the protection of the Fourth Amendment, an expectation of privacy must be one that society is “prepared to recognize as legitimate.” The State of New Jersey has argued that because of the pervasive supervision to which children in the schools are necessarily subject, a child has virtually no legitimate expectation of privacy in articles of personal property “unnecessarily” carried into a school. This argument has two factual premises: (1) the fundamental incompatibility of expectations of privacy with the maintenance of a sound educational environment; and (2) the minimal interest of the child in bringing any items of personal property into the school. Both premises are severely flawed.
Against the child’s interest in privacy must be set the substantial interest of teachers and administrators in maintaining discipline in the classroom and on school grounds. Maintaining order in the classroom has never been easy, but in recent years, school disorder has often taken particularly ugly forms: drug use and violent crime in the schools have become major social problems. Even in schools that have been spared the most severe disciplinary problems, the preservation of order and a proper educational environment requires close supervision of schoolchildren, as well as the enforcement of rules against conduct that would be perfectly permissible if undertaken by an adult.
How, then, should we strike the balance between the schoolchild’s legitimate expectations of privacy and the school’s equally legitimate need to maintain an environment in which learning can take place? It is evident that the school setting requires some easing of the restrictions to which searches by public authorities are ordinarily subject. The warrant requirement, in particular, is unsuited to the school environment: requiring a teacher to obtain a warrant before searching a child suspected of an infraction of school rules (or of the criminal law) would unduly interfere with the maintenance of the swift and informal disciplinary procedures needed in the schools. Just as we have in other cases dispensed with the warrant requirement when “the burden of obtaining a warrant is likely to frustrate the governmental purpose behind the search,” we hold today that school officials need not obtain a warrant before searching a student who is under their authority.
The school setting also requires some modification of the level of suspicion of illicit activity needed to justify a search. Ordinarily, a search – even one that may permissibly be carried out without a warrant – must be based upon “probable cause” to believe that a violation of the law has occurred. However, “probable cause” is not an irreducible requirement of a valid search. The fundamental command of the Fourth Amendment is that searches and seizures be reasonable, and although “both the concept of probable cause and the requirement of a warrant bear on the reasonableness of a search, . . . in certain limited circumstances neither is required.” Thus, we have in a number of cases recognized the legality of searches and seizures based on suspicions that, although “reasonable,” do not rise to the level of probable cause.
We join the majority of courts that have examined this issue in concluding that the accommodation of the privacy interests of schoolchildren with the substantial need of teachers and administrators for freedom to maintain order in the schools does not require strict adherence to the requirement that searches be based on probable cause to believe that the subject of the search has violated or is violating the law. Rather, the legality of a search of a student should depend simply on the reasonableness, under all the circumstances, of the search. Determining the reasonableness of any search involves a twofold inquiry: first, one must consider “whether the . . . action was justified at its inception,”; second, one must determine whether the search as actually conducted “was reasonably related in scope to the circumstances which justified the interference in the first place,”. Under ordinary circumstances, a search of a student by a teacher or other school official will be “justified at its inception” when there are reasonable grounds for suspecting that the search will turn up evidence that the student has violated or is violating either the law or the rules of the school. Such a search will be permissible in its scope when the measures adopted are reasonably related to the objectives of the search and not excessively intrusive in light of the age and sex of the student and the nature of the infraction.
There remains the question of the legality of the search in this case. Our review of the facts surrounding the search leads us to conclude that the search was in no sense unreasonable for Fourth Amendment purposes.
The incident that gave rise to this case actually involved two separate searches, with the first – the search for cigarettes – providing the suspicion that gave rise to the second – the search for marihuana. Although it is the fruits of the second search that are at issue here, the validity of the search for marihuana must depend on the reasonableness of the initial search for cigarettes, as there would have been no reason to suspect that T. L. O. possessed marihuana had the first search not taken place. Accordingly, it is to the search for cigarettes that we first turn our attention.
Because the hypothesis that T. L. O. was carrying cigarettes in her purse was itself not unreasonable, it is irrelevant that other hypotheses were also consistent with the teacher’s accusation. Accordingly, it cannot be said that Mr. Choplick acted unreasonably when he examined T. L. O.’s purse to see if it contained cigarettes.
Our conclusion that Mr. Choplick’s decision to open T. L. O.’s purse was reasonable brings us to the question of the further search for marihuana once the pack of cigarettes was located. The suspicion upon which the search for marihuana was founded was provided when Mr. Choplick observed a package of rolling papers in the purse as he removed the pack of cigarettes. Although T. L. O. does not dispute the reasonableness of Mr. Choplick’s belief that the rolling papers indicated the presence of marihuana, she does contend that the scope of the search Mr. Choplick conducted exceeded permissible bounds when he seized and read certain letters that implicated T. L. O. in drug dealing. This argument, too, is unpersuasive.
Accordingly, the judgment of the Supreme Court of New Jersey is