This is a list of properties and districts listed on the National Register of Historic Places in Maine. There are approximately 1,500 listed sites in Maine. Each of the state's 16 counties has more than forty listings on the National Register.

Current listings by county

The following are approximate tallies of current listings by county. These counts are based on entries in the National Register Information Database as of April 24, 2008 and new weekly listings posted since then on the National Register of Historic Places web site. There are frequent additions to the listings and occasional delistings and the counts here are approximate and not official. New entries are added to the official Register on a weekly basis. Also, the counts in this table exclude boundary increase and decrease listings which only modify the area covered by an existing property or district, although carrying a separate National Register reference number.

	County	# of Sites
1	Androscoggin National Register of Historic Places listings in Androscoggin County, Maine This is a list of the National Register of Historic Places listings in Androscoggin County, Maine.This is intended to be a complete list of the properties and districts on the National Register of Historic Places in Androscoggin County, Maine, United States...	101
2	Aroostook National Register of Historic Places listings in Aroostook County, Maine This is a list of the National Register of Historic Places listings in Aroostook County, Maine.This is intended to be a complete list of the properties and districts on the National Register of Historic Places in Aroostook County, Maine, United States...	59
3.1	Cumberland: Portland National Register of Historic Places listings in Portland, Maine This is a list of the National Register of Historic Places listings in Portland, Maine.This is intended to be a complete list of the properties and districts on the National Register of Historic Places in Cumberland County, Maine, United States...	85
3.2	Cumberland: Other	136
3.3	Cumberland: Total	221
4	Franklin National Register of Historic Places listings in Franklin County, Maine This is a list of the National Register of Historic Places listings in Franklin County, Maine.This is intended to be a complete list of the properties and districts on the National Register of Historic Places in Franklin County, Maine, United States...	43
5	Hancock National Register of Historic Places listings in Hancock County, Maine This is a list of the National Register of Historic Places listings in Hancock County, Maine.This is intended to be a complete list of the properties and districts on the National Register of Historic Places in Hancock County, Maine, United States...	121
6	Kennebec National Register of Historic Places listings in Kennebec County, Maine This is a list of the National Register of Historic Places listings in Kennebec County, Maine.This is intended to be a complete list of the properties and districts on the National Register of Historic Places in Kennebec County, Maine, United States...	118
7	Knox National Register of Historic Places listings in Knox County, Maine This is a list of the National Register of Historic Places listings in Knox County, Maine.This is intended to be a complete list of the properties and districts on the National Register of Historic Places in Knox County, Maine, United States...	91
8	Lincoln National Register of Historic Places listings in Lincoln County, Maine This is a list of the National Register of Historic Places listings in Lincoln County, Maine.This is intended to be a complete list of the properties and districts on the National Register of Historic Places in Lincoln County, Maine, United States...	101
9	Oxford National Register of Historic Places listings in Oxford County, Maine This is a list of the National Register of Historic Places listings in Oxford County, Maine.This is intended to be a complete list of the properties and districts on the National Register of Historic Places in Oxford County, Maine, United States...	89
10	Penobscot National Register of Historic Places listings in Penobscot County, Maine This is a list of the National Register of Historic Places listings in Penobscot County, Maine.This is intended to be a complete list of the properties and districts on the National Register of Historic Places in Penobscot County, Maine, United States...	102
11	Piscataquis National Register of Historic Places listings in Piscataquis County, Maine This is a list of the National Register of Historic Places listings in Piscataquis County, Maine.This is intended to be a complete list of the properties and districts on the National Register of Historic Places in Piscataquis County, Maine, United States...	52
12	Sagadahoc National Register of Historic Places listings in Sagadahoc County, Maine This is a list of the National Register of Historic Places listings in Sagadahoc County, Maine.This is intended to be a complete list of the properties and districts on the National Register of Historic Places in Sagadahoc County, Maine, United States...	57
13	Somerset National Register of Historic Places listings in Somerset County, Maine This is a list of the National Register of Historic Places listings in Somerset County, Maine.This is intended to be a complete list of the properties and districts on the National Register of Historic Places in Somerset County, Maine, United States...	57
14	Waldo National Register of Historic Places listings in Waldo County, Maine This is a list of the National Register of Historic Places listings in Waldo County, Maine.This is intended to be a complete list of the properties and districts on the National Register of Historic Places in Waldo County, Maine, United States...	58
15	Washington National Register of Historic Places listings in Washington County, Maine This is a list of the National Register of Historic Places listings in Washington County, Maine.This is intended to be a complete list of the properties and districts on the National Register of Historic Places in Washington County, Maine, United States...	96
16	York National Register of Historic Places listings in York County, Maine This is a list of the National Register of Historic Places listings in York County, Maine.This is intended to be a complete list of the properties and districts on the National Register of Historic Places in York County, Maine, United States...	171
(duplicates)		(7)
Total:		1,530