A Pakistani American is any citizen or resident of the United States who has Pakistani heritage.

Muslim immigrants from areas that are now part of Pakistan have been migrating to America and first entered the United States as early as the eighteenth century, working in agriculture, logging, and mining in the western states of California, Oregon, and Washington. The passage of the Luce-Celler Act of 1946 allowed these immigrants to acquire U.S. citizenship through naturalization. Between 1947 and 1965, only 2,500 Pakistani immigrants entered the United States; most of them were students who chose to settle in the United States after graduating from American universities, according to reports from the U.S. Immigration and Naturalization Service. This marked the beginning of a distinct 'Pakistani' community in America. However after President Lyndon Johnson signed the INS Act of 1965 into law, eliminating per-country immigration quotas and introducing immigration on the basis of professional experience and education, the number of Pakistanis immigrating to USA increased dramatically. By 1990, the U.S. Census bureau indicated that there were about 100,000 Pakistani Americans in the United States and by 2005 their population had grown to 210,000.

Pakistani people or Pakistanis (Urdu: پاکستانی قوم) (Pakistani Qaum) are a nationality and pan-ethnic group who are the native citizens and residents of Pakistan. Pakistan's estimated population in 2011 is over 187 million making it the world's sixth most-populous country. Pakistan is in essence a multi-ethnic and multilingual nation that is home to people of diverse regional ethnicities and nationalities, reflecting the rich and complex demographics and history of Pakistan. As a result, Pakistanis do not consider their nationality as an ethnicity but as a citizenship of a Muslim state with various ethnicities comprising the "Pakistani people".

Pakistan has one of the world's fastest growing populations. Being a land mass that is transitionally localed both in South Asian, the Greater Middle East and Central Asia, the Pakistani people are a mixture of various ethnic groups. Furthermore, various ethnic groups, invading armies and the migrations to the region by people passing through on their way to and from South Asia have left their imprint on the population.

A police officer (also known as a policeman or policewoman, and constable in some forces, particularly in the United Kingdom and other Commonwealth nations) is a warranted employee of a police force. In the United States, "officer" is the formal name of the lowest police rank; in many other countries "officer" is a generic term not specifying a particular rank, and the lowest rank is often "constable". Police officers are generally charged with the apprehension of criminals and the prevention and detection of crime, and the maintenance of public order. Police officers may be sworn to an oath, and have the power to arrest people and detain them for a limited time, along with other duties and powers.

Some police officers may also be trained in special duties, such as counter-terrorism, surveillance, child protection, VIP protection, and investigation techniques into major crime, including fraud, rape, murder and drug trafficking.

Responsibilities of a police officer are varied, and may differ greatly from within one political context to another. Typical duties relate to keeping the peace, law enforcement, protection of people and property, and the investigation of crimes. Officers are expected to respond to a variety of situations that may arise while they are on duty. Rules and guidelines dictate how an officer should behave within the community, and in many contexts restrictions are placed on what the uniformed officer wears. In some countries, rules and procedures dictate that a police officer is obliged to intervene in a criminal incident, even if they are off-duty. Police officers in nearly all countries retain their lawful powers, while off duty.