Wisconsin
Wisconsin to the north of Chicago has some 10 000 Lithuanians most of whom are descendants of those who arrived before World War 2 and the rest - shortly after World War 2. Therefore Lithuanian buildings of Wisconsin are old and in many cases closed, with only some inscriptions remaining. All of them are located in the old cities and towns on Lake Michigan shores. In this article, they are listed north-to-south.
Their exact locations are marked on this online interactive map of Wisconsin Lithuanian sites.
Sheboygan Lithuanian church, cemetery, and Vaitkus grave
Sheboygan is the Wisconsin's oldest Lithuanian community, dating to the 19th century. It has an Immaculate Conception Lithuanian church (2705 S. 14th St.) and cemetery (land acquired in 1929). While the church with such name still exists, it is a new building that was constructed together with a school in 1960 when the parish was already on the verge of becoming non-Lithuanian; the old church has been destroyed and nothing Lithuanian exists in the new church. Likewise, while the Lithuanian burials still predominate in the cemetery (which is thus the sole Lithuanian cemetery in the entire state of Winsconsin), there is nothing more Lithuanian there. Older Lithuanian burials (the ones with more Lithuanian inscriptions) are located in Southside cemetery.
In its suburb of Kohler the Lithuanian Transatlantic flight pioneer Feliksas (Felix) Vaitkus (Waitkus) is buried. He flew successfully from New York to Ireland in 1935, that way doing the first successful Lithuanian landing after the Transatlantic flight, something the pilots Darius and Girėnas had failed to do. However, Darius and Girėnas have actually passed over Ireland as well - it is just that they chose to continue their flight to Lithuania (ultimately leading to their demise in what is now Poland) while Vaitkus chose to abandon further attempts to reach Lithuania due to bad weather. For this reason, while Vaitkus received hero's welcome at Lithuania at the time, he is far less known than Darius and Girėnas. Still, he was the only person to cross the Atlantic this way in 1935, notorious for bad weathers, and the sixth person in the world to do it alone in a single-engine plane (this is even marked on his grave). Vaitkus is buried in the family zone of a rich local family he married into. Unlike that of many Lithuanian immigrants', Vaitkus's (who was born in the USA to Lithuanian parents) life has been far more affluent: he served in the air force and he completed university studies, and he had a wife from a major local family. Later in life, he worked for Boeing.
Port Washington Lithuanian heritage
While the cute town of Port Washington seemingly has nothing Lithuanian today, it once boasted a small St. Ambrose Lithuanian church (~100 seats) which had a congregation of 30 families and 50 singles. The church was closed in 1964 and demolished in 1965, replaced by apartments.
Milwaukee Lithuanian church and museum
In Wisconsin's largest city of Milwaukee, the Public Museum includes a "European village" exhibit full of houses that represent the European countryside cultures of 1875-1925 (at the time when European villagers would immigrate to Milwaukee en-masse). Among the 32 cultures represented the Lithuanian ethnicity is exhibited as well. The village is dedicated to "All past, present and future immigrants in appreciation of their contributions to American culture". A small Lithuanian hut has been recreated there, with an interior stuffed with Lithuanian things and its exterior decorated in Lithuanian wooden carvings. Compared to the homes of the larger communities it is smaller, as Lithuanians were not among the city's major communities. Other Lithuanian details in the "Village" are the word "Lietuviai " near the entrance and a Lithuanian doll in the gallery of ethnic costumes. In general, the museum is a universal one that covers nearly everything, from animals to Native Americans to history to the planets.
A building of St. Gabriel Lithuanian church still stands in Milwaukee as well (construction began at 1913). It is now used, however, by the Congregation of the Great Spirit, effectively a Native American Catholic parish. No Lithuanian details remain outside.
Racine Lithuanian church
Racine once had a St. Casimir church. It has been closed down in 1998 (merging it with Irish, Slovak, German and Polish parishes). The building (815 Park Ave) currently serves as a Baptist chapel. The inscription "St. Casimir RC Church" over the door has been removed and so was the statue of St. Casimir over it, with nothing Lithuanian remaining.
Kenosha Lithuanian church
Kenosha has a St. Peter Lithuanian church (2224 30th Ave) - the current building dating to 1966. Like in Sheboygan, it has been constructed together with a school, replacing the older Lithuanian church, with a plans to add new church later. The plans never became a reality, however, leaving Kenosha with a church that looks more like a school hall from the outside.
Unlike in Sheboygan, however, in Kenosha the Lithuanian heritage has been preserved far better: there are Lithuanian details such as Lithuanian anthem in the church, while the underground church hall has a large mural dedicated to the parish's Lithuanian roots that has been unveiled in 2001, long since the parish is no longer Lithuanian. It includes ethnic symbols of Lithuania such as the flag, Vytis, as well as Lithuania's religious buildings: the Hill of Crosses, the Three Crosses in Vilnius, a traditional roadside cross and Lithuanian ethnic patterns. Once, the church hall also served as a school cafeteria, however, the school has been closed in the early 2010s and the premises rented out.
Lithuanian anthem, pictures of Lithuanian priests are also available near the church entrance, while outside one may see the Divine Mercy symbol that has originated in Vilnius, Lithuania.
Since 1926 the church is being cared for by Maryan fathers; however, as of 2018, they are Polish rather than Lithuanian.
 
The map
All the Lithuanian locations, described in this article, are marked on this interactive map, made by the "Destination Lithuanian America" expedition (click the link):
Map of Lithuanian heritage in western Midwest
More info in Lithuanian heritage in Illinois, Indiana, Wisconsin.