Just replaced battery, now car wont turn over!

**No crank at all/nothing/nada when key is engage to starting position

Could be a blown fusible link, the starter, starter relay, clutch switch/park and neutral switch/transmission position switch and ignition switch assuming the battery condition and connections are good. Note:If it doesn't apply disregard.

Just to add to this one did you make sure the battery cables are clean and tight?Also did you check all the fuses?Especially the big green ones in the underhood fuse box?Do the lights dim or go out while trying to start it?Do you have a test light and know how to use one?Also do you have a automatic or manual transmission?

Alright sounds good you had a aftermarket alarm that went off and disabled your starter circuit you left that part out lol. But glad you got it all figured out. Your welcome thats what were here for to help people with there cars.