I was in Santo Domingo and I didn't see any of the flags [shown on Wikipedia]; the city flag in the historic center was hoisted only in a few buildings. I see the flag only with arms (about 8/10 of the flag) and with arms below and the inscripcion "AYUNTAMIENTO DEL DISTRITO NACIONAL" (in two lines). Jaume Ollé, 18 April 2015
Regarding which flag is the right one, I've only come across pictures where the flag is partially displayed, as seen in the following images: here, here, and here.
My best guess is that, based on the names of the Administrative divisions, and based on the graphic evidence that each Municipality has its own flag with the CoA/logo featured on it (as I will send another e-mail later with my findings regarding the Santo Domingo Province and its respective Municipalities' flags), I think that the official flag has actually the name of the government entity as here. Esteban Rivera, 18 April 2015
I came across a photograph that may be showing the flag of the capital, Santo Domingo de Guzmán. The photograph can be seen here, and appears to show the newly appointed foreign minister sitting in front of a white flag bearing the arms of Santo Domingo. I remember Jaume Ollé saying on 18 April that the flag he saw flying in Santo Domingo was white with the city arms displayed and the inscription "AYUNTAMIENTO DEL DISTRITO NACIONAL" in two lines. Does what we can see of the flag in this online article match with what we believe to be the city flag of Santo Domingo de Guzmán? Randy Young, 12 October 2015
The flags is very similar that I see, but the letters were of equal size in both lines, occupying exactly the same length, but I believe that there's not a regulation and flags with minor variations can exist. One variation includes the words "REPUBLICA DOMINICANA" at the bottom of the inscription, while another has the inscription in a cursive-like script. Jaume Ollé, 14 January 2016
The current government administrative organization of the city is based on Law No. 163-01 of October 16, 2001, which establishes the Provincia de Santo Domingo (Santo Domingo Province) and modifies the boundaries of the Distrito Nacional (National District). Thus, the Distrito Nacional is an enclave within the Provicinia de Santo Domingo (geographically speaking) but in practice it acts as a Province of its own (for budget purposes). This Law split the Provincia de Santo Domingo to form the Distrito Nacional. So, all in all the Distrito Nacional is conformed solely by the Ciudad de Santo Domingo, and its Executive authority is called Ayuntamiento de Distrito Nacional (National District City Council) and its ruler is called Síndico or Alcalde (Major), and the legislative body is called Concejo Municipal (Municipal Council).
Sources: Santo Domingo Province Wikipedia article; Santo Domingo Este website; Distrito Nacional website Esteban Rivera, 18 April 2015
Realizing that the Distrito Nacional is synonymous with the city of Santo Domingo de Guzmán, is there a difference in governing bodies and therefore in representative flags? In other words, is there a Distrito Nacional provincial government that's separate from the Santo Domingo de Guzmán municipal government, or is the situation more like that of Washington, DC, where the Washington city council doubles as the governing authority for the entire District of Columbia? Randy Young, 15 January 2016
The municipality of Santo Domingo existed before the creation of the Distrito Nacional and I believe that remain as local (city) administration under name of Ayuntamiento (alternate name of "municipality" in Spanish) del Distrito Nacional (called Santo Domingo de Guzman, 1936-1955), while Distrito Nacional is as a provincial administration, with different competences but over same territory, but in fact I don't know. Jaume Ollé, 15 January 2016