AP: 30 cities so recognizable, no state name needed in articles and writings

[dimondpark]

This is interesting.

Domestic Datelines
Some cities are so widely known that they are capable of standing alone in a dateline, without the name of a state for additional reference. A list of domestic cities that stand alone in datelines follows. The norms that influenced the selection were the population of the city, the population of its metropolitan region, the frequency of the city’s appearance in the news, the uniqueness of its name, and experience that has shown the name to be almost synonymous with the state of nation where it is located.

ATLANTA
BALTIMORE
BOSTON
CHICAGO
CINCINNATI
CLEVELAND
DALLAS
DENVER
DETROIT
HONOLULU
HOUSTON
INDIANAPOLIS
LAS VEGAS
LOS ANGELES
MIAMI
MILWAUKEE
MINNEAPOLIS
NEW ORLEANS
NEW YORK
OKLAHOMA CITY
PHILADELPHIA
PHOENIX
PITTSBURGH
ST. LOUIS
SALT LAKE CITY
SAN ANTONIO
SAN DIEGO
SAN FRANCISCO
SEATTLE
WASHINGTON

Stories from all other U.S. cities should have both the city and state name in the dateline, including KANSAS CITY, Mo., and KANSAS CITY, Kan. For example,

ANN ARBOR, Mich.
SACRAMENTO, Calif.

You should always spell out Alaska, Hawaii, Idaho, Iowa, Maine, Ohio, Texas, and Utah. Abbreviate all other states as they are listed on our AP Style State Abbreviations page.

https://writingexplained.org/ap-style/ap-style-datelines