File:Albania distribution of Greeks c1900.png

English: This map outlines the regional distribution of ethnic Greeks in Albania around the turn of the 20th century, when the Ottoman Empire was collapsing.

Main sources used:
1. The Ottomon census of 1908, with data published in Destani and Psomas' works. Used for the South.
2. The Albanian census of 1918, with data referenced in Siegfriend, Seiner and etc. Used for Central and Northern regions.

Note: 1. The boundaries on this map do not contain all of the land of Leskovik district, because a large swath of what the Leskovik kaza held (perhaps a majority) is now located in Greece- this includes the city of Konitsa, for example.
2. Considering that, for the South, Psomas' source is traceable back to Nicholas J. Cassavetes' statistics presented at a "Pro-Epirotic conference" in the US, it probably overstates the numbers of Greeks in Southern Albania. Cassavetes' work, which he says come from Virgili's in 1908, contained numerous mathematical errors, as can be seen here (see page 77, https://books.google.com/books?id=pFUMAAAAYAAJ&pg=PP8&lpg=PP8&dq=Nicholas+J+Cassavetes+North+Epirus&source=bl&ots=QnVBxrV2YR&sig=J7Pj3fquXTMZE5VniS8Nt6U9fNY&hl=en&sa=X&ei=2MfOU5LWKNKryATuuYKYAg&ved=0CDMQ6AEwAg#v=onepage&q=Nicholas%20J%20Cassavetes%20North%20Epirus&f=false... he adds 72674, 10800 and 1400 to get... 64874...?). Psomas does correct many of Cassavetes' errors, but this doesn't change the fact that the source is basically a 1919 Greek propaganda organization. For that reason, unless substantial new data comes out, I don't plan to use this map (yet) for anything without noting this, and that it to a degree represents a Greek perspective on the issue in the South.

3. For the districts of Korça, Devolli, Përmeti and Erseka (all of which have low concentrations of around 1-5% of Greeks that were not noted by Virgili) modern census data is used. The rationale for this is while their presence in Korça may be a result of urbanization, it is unlikely that this applies elsewhere and these largely rural Greeks are probably not recent immigrants. For Vlora (excluding Himara), data from the census is used, as well as some sources such as James Pettifer's The Politics of National Minority Participation in Post-communist Europe.