In the second half of the 15th and early 16th century borders of Croatia spread north and included the territory of the Zagreb county and its surroundings, that have already been under the same administration.
15. sajandi teisel poolel ja 16. sajandi alguses levisid Horvaatia piirid põhja poole ja haarasid Zagreb krahvkonna ja selle ümbruse territooriumi, mis on alati olnud sama haldusüksus.