Like probate records, church records often provide some of the earliest genealogical information available through baptismal records, marriage records, church membership information, and death records.  The Niagara Falls Public Library has a number of  materials which will help you in your search, but due to the nature and rarity of the materials they may only be viewed at the Victoria Avenue Library Reference Department. These items will not be made available through the InterLibrary Loan system.

LHC 971.3 Ont
Carnochan, Janet.
Early Churches in the Niagara Peninsula, Stamford and Chippawa, with Marriage Records of Thomas Cummings and Extracts from the Cummings Papers, (1820-1837).
Ontario Historical Society Papers and Records, Vol 8, (1907).
p. 149-225.
reprinted LHC 929.37133 CarE, with Index

LHC 929.37133 Car
Carnochan, Janet.
Index to Early Records of Churches in the Niagara Car Peninsula, 1901-1907.
Ontario Historical Society Papers and Records. Vol. 3, (1901), and
Vol 8, (1907)

LHC 929.371339 Chi Microfilm
Chippawa Presbyterian Church.
Welland County Presbyterian Church of Chippawa 1842-1923.

LHC 929.3 Chu Microfiche
Church of Jesus Christ of Latter-Day Saints. Parish and Vital Records List. 1988.

LHC971.3 Ont
Cruikshank, Ernest Alexander.
The Register of Saint Paul's Church at Fort Erie, 1836-1844.
Ontario Historical Society Papers and Records, Vol. 27, 1931,
p. 77-192D

LHC 285.271339 Dru Microfilm
Drummondville Presbyterian Church (Niagara Falls) Church Records, 1843-1901.

LHC 971.339 N577
Enumerator's Roll, St. Mark's Church (1848).
Niagara Historical Society No. 27, p. 51-54

LHC 929.3713 Hol
Holy Trinity Church, Chippawa, Ontario, Parish Registers, (incomplete) 1840-1920.

LHC929.37133 HolB
Holy Trinity Church Baptisms, Marriages, Burials 1828-1927. 1992

LHC 929.371351 Imm
Immaculeé Conception (St. Catharines). Baptêmes, Mariages et Sépultures, 1924-1985.

LHC 971.339 N577
List of Mennonites, Quakers or Junkers in 2nd Riding, District of Niagara 1838.
Niagara Historical Society No. 27, p. 46

LHC 929.371016 Lis
List of Parish Registers held at the Public Archives of Canada. 1985.

LHC 929.371339 Mil
Miller, F.W. Registers of St. George's Church (Drummondville).l Baptisms: 1836-1844
Marriages:1840-1844

LHC 929.371339 Ont
Ontario Genealogical Society. Niagara Peninsula Branch.
Anglican Church Records Niagara Falls, Coloured Extractions. 1993.

LHC 929.3 Pub
Public Archives of Canada. Checklist of Parish Registers, 1981.

LHC Periodical
Records of the Presbyterian Church, Clinton and Grimsby, 1819-1870. Families, vol. 26, #1, Feb. 1981, p. 26-32

LHC 929.371338 Sac
Sacré-Coeur (Welland). Baptêmes, Mariages et Sepultures, 1919-1984.

LHC 971.339 N577
St. Andrew's Church Subscribers, 1794-1829.
Niagara Historical Society No. 27.
1794: p. 8-9
1796: p. 10
1802: p. 10-11
1803: p. 21-24
1826: p. 29-31
1829: p. 34-36

LHC 929.371339 Sta
St. Antoine de Padou (Niagara Falls).
Baptêmes, Mariages et Sépultures, 1955-1985

LHC 929.371338 Sai
Saint Jean-de-Brébeuf (Port Colborne).
Baptêmes, Mariages et Sai Sépultures, 1951-1983

LHC 929.371338 For
St. Paul's Anglican Church (Fort Erie).
The Register....1836-1844.

LHC 971.339 N577
St. Vincent de Paul's Church Subscribers 1839-1841.
Niagara Historical Society No. 27, p. 38-39