Downtown in the context of "Bayamón, Puerto Rico"

The barrios of Puerto Rico are the third-level administrative divisions defined with geographic boundaries serving as the primary legal subdivisions of the 78 municipalities in the archipelago and island of Puerto Rico, an unincorporated territory of the U.S. Amounting to 902 wards or boroughs equivalent to minor civil divisions in the U.S., like cities, townships, and parishes, barrios are under the governmental authority of the popularly elected strong mayor and unicameral legislature governing the municipality within which they are located. Barrios are subdivided into numerous subbarrios, districts, communities, and/or sectors.

Except for San Juan, Ponce, Florida, and Vieques, all municipalities have a barrio equivalent to a downtown area in the U.S. called pueblo, officially known as barrio-pueblo (literally "neighborhood-town"), which typically is the site of the historic Spanish colonial settlement, administrative center, and urban core of the municipality. Of the 902 barrios proper, 828 are barrios and 74 barrios-pueblos.

A city centre, also known as an urban core, is the commercial, cultural and often the historical, political, and geographic heart of a city. The term "city centre" is primarily used in British English, and closely equivalent terms that exist in other languages, such as "centre-ville" in French, Stadtzentrum in German, or shìzhōngxīn (市中心) in Chinese. In the United States, the term "downtown" is generally used, though a few cities, like Philadelphia, use the term "Center City" or "City Center".

A central business district (CBD) is the commercial and business center of a city. It contains commercial space and offices, and in larger cities will often be described as a financial district. Geographically, it often coincides with the "city centre" or "downtown". However, these concepts are not necessarily synonymous: many cities have a central business district located away from its traditional city center, and there may be multiple CBDs within a single urban area. The CBD will often be highly accessible and have a large variety and concentration of specialised goods and services compared to other parts of the city.

In Chicago, the Chicago Loop is the second-largest central business district in the United States. It is also referred to as the core of the city's downtown.

Commercial area, commercial district or commercial zone in a city is an area, district, or neighborhoods primarily composed of commercial buildings, such as a strip mall, office parks, downtown, central business district, financial district, "Main Street", or shopping centers. Commercial activity within cities includes the buying and selling of goods and services in retail businesses, wholesale buying and selling, financial establishments, and a wide variety of uses that are broadly classified as "business." While commercial activities typically take up a relatively small amount of land, they are extremely important to a community's economy. They provide employment, facilitate the circulation of money, and often serve many other roles important to the community, such as public gathering and cultural events.

A commercial area is real estate intended for use by for-profit businesses, such as office complexes, shopping malls, service stations, bars and restaurants. It may be purchased outright by a developer for future projects or leased through a real estate broker. This type of property falls somewhere between residential and industrial property.Practically every incomer must grant permission to build a new office complex or other profit-making business, the city government must determine that the chosen area is indeed commercial area. If the zones which separate commercial, industrial, and residential area are clearly zoned for commercial use, the city will allow the sale to proceed for the stated use. If any part of the property extends into a residential or industrial zone, however, then the buyer must seek a 'variance', special permission to cross over a zone boundary.

In urban planning, a historic core city or central city is the municipality with the largest 1940 population in the present metropolitan area (metropolitan statistical area). This term was retired by the US census bureau and replaced by the term principal city, which can include historic core cities and post-WWII cities. Metropolitan areas were no longer considered monocentric, but polycentric due to suburbanization of employment. A historic core city is not to be confused with the core of a metropolitan area which is defined as an urban area with a population of over 50,000 by the US census bureau.

Historic core cites in the United States often have higher detached single family housing rates, lower density, and fewer jobs than surrounding satellite cities and suburbs. A central city is usually the first settlement established in an urban region, years before the outlying districts came into existence. These cities typically contain less economic activity and more crime than their surrounding areas. Central cities often form the regional downtowns of metro areas. The term is used mainly in US context, although since the 1970s it has also become relatively common in Canada and, to a lesser extent, Europe and Australia.

Pueblo is a term primarily used in Puerto Rico to refer to the municipal district (barrio) that serves as the administrative, historic and cultural center of a municipality. The concept of pueblo is often used locally as analogous to the concept of downtown in U.S. cities. Pueblos are officially called barrio-pueblo by the United States Census since 1990.

The Loop is Chicago's central business district and one of the city's 77 municipally recognized community areas. Located at the center of downtown Chicago on the shores of Lake Michigan, it is the second-largest business district in North America, after Midtown Manhattan in New York City. It contains the world headquarters and regional offices of several global and national businesses, retail establishments, restaurants, hotels, museums, theaters, and libraries—as well as many of Chicago's most famous attractions. The district also hosts Chicago's City Hall, the seat of Cook County, offices of the state of Illinois, United States federal offices, and several foreign consulates. The intersection of State Street and Madison Street in the Loop is the origin point for the address system on Chicago's street grid, a grid system that has been adopted by numerous cities worldwide.

The Loop's definition and perceived boundaries have evolved over time. Since the 1920s, the area bounded by the Chicago River to the west and north, Lake Michigan to the east, and Roosevelt Road to the south has been called the Loop. It took its name from a somewhat smaller area, the 35 city blocks bounded on the north by Lake Street, on the west by Wells Street, on the south by Van Buren Street, and on the east by Wabash Avenue—the Union Loop formed by the 'L' in the late 1800s. Similarly, the "South Loop" and the "West Loop" historically referred to areas within the Loop proper, but in the 21st century began to refer to the entire Near South and much of the Near West Sides of the city, respectively.

The term inner city (also called the hood) has been used, especially in the United States, as a euphemism for majority-minority lower-income residential districts that often refer to rundown neighborhoods, in a downtown or city centre area. Sociologists sometimes turn the euphemism into a formal designation by applying the term inner city to such residential areas, rather than to more geographically central commercial districts, often referred to by terms such as downtown, city centre, or central business district.