usa marriage records

Hi

 I am from England  and not  used  to  looking for   Usa  connections.

I am looking  for a  marriage  between James Joseph Kehoe(keogh) born 1869   and Elizathen (Bessie) M Woodward  Born 1883      The  had  first  child  in Hartford  New York in 1906   so looking  for a marriage  before  that.   Can anyone  advise  me where  to  look  thanks.

Andrea