WNYC 820 AM is the latest New York station to hit the century mark. The station debuted on July 7, 1924. WNYC is planning special programs on Saturday for its 100th birthday. As I count it, it was the sixth radio station to sign on in New York that's still on the air. There were several other stations you could hear in NYC 100 years ago that are now lost to history. 

Here's the list of earliest New York stations that survive to this day...

.
1) WABC 770 ... October 7, 1921 ... It began as WJZ at the Westinghouse plant in Newark. After Westinghouse put KDKA on the air in Pittsburgh, it added several more radio stations so people who bought Westinghouse radios would have something to listen to. WJZ moved to New York in 1923 and became WABC in 1953. 

.
2) WOR 710 ... February 2, 1922 ... It also began in Newark, at Bamberger's Department Store. Like WJZ, it was set up to give customers something to listen to when they bought a radio, this time to benefit the store that sold them. It moved to New York City in 1941. It was the flagship station of the Mutual Broadcasting System from 1934 to 1957.

.
3) WEPN 1050 ... March 19, 1922 ... It began as WHN, owned by the "Ridgewood Times" newspaper in Ridgewood, Queens. It later spent time as WMGM, briefly as WFAN and as WEVD.

.
4) WBBR 1130 ... April 10, 1922 ... Another station that began in Newark, this time as WAAM. It later merged with WODA in Paterson and moved to New York. It spent time at 1280 kHz, later moving to 1130 kHz, for decades as WNEW, and today as WBBR. 

.
5) WFAN 660 ... May 1922 ... It began as WEAF, owned by AT&T. It started as a "toll" radio station, similar to today's brokered programming stations. Individuals would pay AT&T for a block of time and could sing, play an instrument, do a dramatic reading or discuss their business. It spent a few years as WRCA and was WNBC for decades as the flagship of the NBC Radio Network before becoming WFAN in 1988.

.
6) WNYC 820 ... July 7, 1924 ... This was set up by the City of New York, one of the first radio stations established by a municipality. It shared time on 570 kHz with WMCA before moving to 830 kHz for decades but required to go off the air at night to avoid interference with WCCO Minneapolis. WNYC served as a way for the city to communicate with workers and residents, with shows devoted to police officers, firefighters and other employees. During a newspaper strike, Mayor Fiorello LaGuardia used it to read to children the comic strips they were missing. It moved to 820 kHz in 1989.

.
7) WCBS 880 ... September 20, 1924 ... It originally had the call sign WAHG for Arthur H. Grebe, a pioneering broadcaster. It later became WABC, set up by the Atlantic Broadcasting Company but no relation to today's WABC. It was bought by CBS in 1939 and became WCBS in 1946. It celebrates its 100th birthday in 2 1/2 months.

.
8) WINS 1010 ... 1924 ... The actual sign-on date is uncertain. But we know WINS began about 100 years ago as a way for Gimbel's Department Store to sell radio as WGBS (Gimbel Brothers Store). It was later acquired by William Randolph Hearst as the flagship of his International News Service, hence the call letters. In 1965, it became the first successful All-News station in the U.S. I haven't heard if Audacy has any 100th anniversary celebration planned for this year for either WCBS or WINS.

.
Other early NYC stations: WMCA 570 and WZRC 1480 (1925), WWRL 1600 (1926), WKDM 1380 and WWRV 1330 (1927), WADO 1280 (1930) and WFME 1560 (1936).