Maps

Arcanum Maps — Maps are georeferenced and users can toggle transparency between the historical and modern maps. Includes maps of Prussia (1877), Russia (1872), and the First, Second, and Third Military Surveys of the Hapsburg Empire (including Galicia). Places in the Russian Empire can be searched by Polish names (with or without diacritics), even though Russian is used on the map. Note that available cadastral maps do not extend as far north as Poland.
Austria-Hungary Empire c. 1911 (Distribution of Races)
Austro-Hungarian Empire with Modern-day Administrative Boundaries
Bureau of Land Management — U.S. Land Grants 
/ Land Entry Case Files – How to Order Land Grant Papers
Cadastral Maps (Inventory of Cadastral Maps and Landowner Records held in the Rzeszów State Archive)
Cadastral Maps (Link to Fond # 29 / Collection 280 – Archiwum Narodowe w Krakowie)
Cadastral Maps (Link to Fond # 126 – Inventory of Cadastral Maps in  Archiwum Państwowe w Przemyślu)
Cadastral Maps (Szukajwarchiwach.pl_key word kataster)
Churches in Kreis Schlochau
Counties of Lithuania — Map
David Rumsey Historical Map Collection
Detroit City Map Plan c. 1881
Detroit City Map c. 1891
Detroit City Map c. 1904 (with Wards & Election Districts)
Detroit City Map c. 1915
Detroit City Map c. 1919
Detroit West; Detroit East c. 1966
Detroit City Street Conversion — 1921 (Old and New House Numbers)
Detroit Diocese Deanery Map
Die Gemeinden der Evangelisch-Augsburgische Kirche in Polen am 1.9.1939 (page 333)
East Prussia
Emigrant Map to North America c. 1853 (Auswanderer-karte und wegweiser nach Nordamerika)
Ethnographic Map of Poland (current day)
FEEFHS Map Library
Forgotten Galicia
Galician Cadastral Maps — Discussion on where to find them and how to use them
Galicia Geography and History
Galician Map
General Land Office (GLO) Plat Maps
Geographical Names
Geoportal.gov.pl
German Empire — 1871-1918
German Empire — 1871
Gesher Galicia Map Room
Google Maps
Grodno Governorate — c. 1834
Historical Atlases and Maps of U.S. and States
Historic Map Works
Historical Maps of Germany
Holy Cross Cemetery – Detroit, Michigan – Map
Interactive Modern Map of Poland
Kaszuby
Kingdom of Poland and the Grand Duchy of Lithuania — c. 1799
Kreis Schlochau, West Prussia — c. 1914
Library of Congress — Map Collection
List of the Villages in Poland (with link to maps & demographics circa 2012)
Lithuania
Lithuania — 1931-1938
Lithuania — Counties of Lithuania
Lithuania — Major Cities
Lithuania — Wilno Diocesan Map (late 19th century)
Lithuanian Maps (Historic)
Lithuanian Places in other languages
Lithuanian Political Map — c. 2010
Locate My Name
Map Archive of Wojskowy Instytut Geograficzny — 1919-1939
Map of Poland with Plans of Cities (mapa.szukacz.pl)
Map of religious denominations other than Roman Catholic (as of 2015)
Map of Roman Catholic parishes of the Republic of Poland AD 1772
Mapa.Szukacz.pl
Mapire – The Historical Map Portal
Mapster
Mapywig
Metryki.GenBaza (Map)
Meyers Gazetteer of the German Empire (Map)
Michigan County Histories and Atlases
Michigan Railway Maps (1828-1900); Lake Shore & Michigan Southern Railway (1876)
Michigan Related Maps (various sources)
Military Mapping Survey of Austria-Hungary c. 1910
Oder–Neisse line
Old Maps of Lithuania and the Baltics
Old Maps of Poland and Central Europe
Old Maps Online
Optional Map Selections
Poland’s Roman Catholic Diocese
Poland’s Territorial Changes from 1635-2009
Polona Maps (16th – 20th centuries) — National Library of Poland
Polish Voivodships
Pomerania
Ravenstein — The Atlas des Deutschen Reichs by Ludwig Ravenstein Village Name Index
Roman Catholic Parishes and Member Villages in Eastern Galicia
Romania and surrounding countries
Rural Property Inventories — Library of Michigan Collection
Sanborn Maps
Slovakia
Surname Distribution Map_Kazimierz Rymut
Surname Distribution Maps_FamilySearch
Surname Map of Modern Poland
Surname Map of Modern Poland (alternate)
Topographic Map of Galicia (1779–1783) from War Archives in Vienna
Topographic Maps of Eastern Europe
United States Enumeration District Maps — 1900-1940
United States Indexed County Land Ownership Maps (Plat Maps) — 1860-1918 (ancestry.com)
Virtuelles Kartenforum 2.0  — Georeference to Historic Maps
West Prussia
West Prussia Land Records —1772-1773

Michigan Counties

Bay County, MI_1916_Township, City, and Village Maps
Berrien and Cass Counties, MI_1893_Portrait and Biographical Record
Berrien and Van Buren Counties, MI_1880_History and Biographical Sketches
Branch County, MI_1879_History and Biographical Sketches
Calhoun County, MI_1891_Portrait and Biographical Album
Cass County, MI_1882_History and Biographical Sketches
Clinton and Shiawassee Counties, MI_1891_Portrait and Biographical Album
Detroit and Wayne County, MI_1890_History of Detroit, Wayne County, and early MI: [Vol. 1]
Detroit and Wayne County, MI_1890_History of Detroit, Wayne County, and early MI: [Vol. 2]
Genesee County, MI_1908_Biographical Sketch
Gratiot County, MI_1882_Portrait and Biographical Album
Gratiot County, MI_1913_Historical, Biographical, Statistical
Hillsdale County, MI_1879_History and Biographical Sketches
Houghton, Baraga, and Marquette Counties, MI_1903_Biographical Record
Huron County, MI_1904_Plat Book with Biographical Sketches
Huron County, MI_1954_Plat Book
Ingham and Eaton Counties, MI_1880_History and Biographical Sketches
Ingham and Livingston Counties, MI_1891_Portrait and Biographical Album
Ionia and Montcalm Counties, MI_1881_History and Biographical Sketches
Ionia and Montcalm Counties, MI_1891_Portrait and Biographical Album
Isabella County, MI_1899_Plat Book
Jackson County, MI_1881_History and Biographical Sketches
Kalamazoo County, MI_1880_History and Biographical Sketches
Kent County, MI_1876_Illustrated Historical Atlas
Lake Huron Shore, MI_1883_History and Biographical Sketches
Lenawee County, MI_1903_History and Biographical Record
Livingston County, MI_1880_History and Biographical Sketches
Macomb County, MI_1905_Past and Present with Biographical Sketches
Muskegon County_1882_History and Biographical Sketches

Muskegon and Ottawa Counties, MI_1893_Portrait and Biographical Record
Northern Michigan, MI_1895_Portrait and Biographical Record
Northern Michigan, MI_1905_Biographical History
Oakland County, MI_1877_History
Oakland County, MI_1891_Portrait and Biographical Album
Oceana County, MI_1895_Topography, Biography, History, Art Folio
Ottawa and Kent Counties, MI_1876_Illustrated Historical Atlas
Ottawa County, MI_1882_History and Biographical Sketches
Saginaw and Bay Counties, MI_1892_Portrait and Biographical Record
Sanilac County, MI_1906_Plat book of the villages, cities, and townships of the County
Shiawassee and Clinton Counties, MI_1880_History and Biographical Sketches
St. Clair County, MI_1883_History
St. Clair County, MI_1897_Plat book of the villages, cities, and township of the County
The Traverse Region_MI_1884_History with Portraits and Biographical Sketches
Tuscola and Bay Counties, MI_1883_History and Biographical Sketches
Tuscola County, MI_1902_Plat Book with Biographical Sketches
Upper Peninsula, MI_1883_History and Biographical Sketches

WPA – Michigan Rural Property Inventories (Description / Link)