The Far Masovian dialect (Polish: gwary Mazowsza dalszego) belongs to the Masovian dialect group and is located in an area just north of the capital of Poland, Warsaw. It borders the Near Mazovian dialect to the south, the Podlachia dialect to the east, the Kurpie dialect and Masurian dialects to the north and the Greater Polish Chełmno-Dobrzyń dialect to the west. Generally, this dialect is fading, and many typical Masovian features are being replaced with Standard Polish features.

Typical of Masovian dialects, devoicing of word-final consonants before vowels and liquids is present here, including before clitics. This does not affect prepositions. Also typical of Masovian dialects is the presence of masuration, but it is now a sporadic change, and forms not having undergone masuration are more common. Hypercorrections may also occur.

The shift of initial ja-, ra- > je-, re- is present but limited to particular words: jek (jak), remię (ramię). Often this process is undone, as well. The shift of medial -ar- to -er- is found only in forms of the verbs trzeć, drzeć, żreć, umrzeć, uprzeć się, zaprzeć, zawrzeć and the nouns tartak, tarcica, umarlak, darń. This process is also being undone, particularly in the north. The shift of final -aj to -ej is rare here. Ablaut is sometimes levelled here, but often forms that of Standard Polish are preferred. y sometimes merges with i, but inconsistently, and usually the Standard Polish pronunciation of y is preferred. i can sometimes lower before liquids, but this is generally restricted to certain words. Otherwise, i may merge with y after m or w, especially in the first person dative singular pronoun my (mi), the instrumental plural endings for adjectives, pronouns, and nouns, and some other words: śwynia, gmyna. e may be inserted in certain consonant clusters: wiater.

Slanted á was generally retained as á until at least the 1950s, and could sometimes raise to ó, or u before a nasal, but in recent years is generally realized as a, as in Standard Polish. Slanted é is usually merged with e due to influence from Standard Polish but, in the past, merged with i or y. e often raises to é in words ending in -ej, before final -rz, -r, and voiced consonants. The group irC often shifts to érzC: sierzp. The group éj may shift to i after soft consonants and y after hard consonants: boski (boskiej), dobry (dobrej). Slanted ó may be retained as ó, more frequently merge with u, or rarely merge with o, and o may become ó before nasals, except in the dative plural ending -om, and words ending in -o often shift to -ój.

ę tends to be realized like in Standard Polish: it decomposes medially except before sibilants (with exceptions). Medial ę sometimes lowers, but this is fading, it also sporadically raises to yN or iN, but this is also uncommon. Final -ę generally denasalizes to -e. Medial ą tends to also decompose to oN, and sometimes then rises to óN or uN. Final -ą often denasalizes to -o or sometimes -oł, and sporadically raises to -ó or -u. However, before sonorants, both ę and ą may lose nasality and/or gain j or ł: gęjśor, gołsior (gęsior), cięłżkie (ciężkie), ciełzar (ciężar). They may also sometimes decompose: krawenżnik (krawężnik), dzionsła (dziąsła). The group eN sometimes lowers to aN, or sometimes raises to éN or yN/iN. However, this is a realization of Standard Polish that is becoming more common. The group oN also frequently raises to óN, uN. o may sporadically raise before r in certain words. y may lower to e before m and n, and shifts to ó before rz. u may lower to o before m and n. Sporadic secondary nasalization may occur. Future forms of być often lose nasality.

Initial i- sometimes takes prothetic j-, but more common are forms without this prothesis. Initial o- may labialize to ô-, but weakly, and this is often avoided, sometimes leading to hypercorrections: okieć (łokieć). Even less frequently, initial u- may also undergo weak labialization to û-. Initial a- may take a prothetic h- or j- and may rarely labialize. Initial e- may gain a prothetic w or j, and words beginning with je- often shift to e-: esce (jeszcze).

Soft labials tend to decompose here, and in various ways. The most common ways is for the palatal element to become stronger and become j, but soft ḿ may become mń, or rarely a palatal consonant may be inserted. The result consonant clusters can then sometimes further reduce: ofiara > ofsiara > osiara; miasto > mniasto > niasto. This final shift is rare here, but hypercorrections can occur: śmjodanie (śniadanie). Similarly, ń may shift to mń initially before e: mnieuk (nieuk). Soft w between vowels often shifts to j: cłojek (człowiek), spojedź (spowiedź). The groups śf’, ćf’, and dźw’ may also harden: śfynie (świnie). However, this change is limited to the word świnia and its derivatives. źw- may shift to dźw-: dźwierzyna (zwierzyna). m may also harden in the instrumental plural ending -ami or -ymi/-imi: wołamy (wołami), takymy (takimi). The group li may harden to ly, but this is rare, and has been rare since after World War II. In the northwest, kie, gie, ki, gi tend to remain soft; elsewhere, they tend to harden: cukerek (cukierek), takymy (takimi). chy may also soften: chiba (chyba). The groups chrz, chw sometimes change to krz, kw or f: krzan (chrzan), kwasty (chwasty), fytać (chwytać). The group kt tends to shift to cht — chto (kto) — and, similarly, kł to chł. The group kk tends to reduce to k: lekki i (lekkie), mjenkie (miękkie). tk may shift to tch. Initial ju-, ja-, and je- often shifts to u-, a-, and e-. Masuration is common in this dialect. Final -ł is often lost in the past tense of verbs whose stems end in a consonant: jad (jadł). d may shift to g before ł or l: mgły (mdły), jeglina (jedlina). rd- shifts to drd-: drdzeń (rdzeń). The clusters kć, kp shift to kść, kśp: kśpić (kpić). śćk is often retained: śćkło (szkło), and śćklep was formed from sklep via analogy to this. Final -z is lost in certain adverbs: tera, zara.

Uncontracted forms often exist and can raise: stojać, postojić.